feat: 增强日月食搜索、沙罗周期与内行星凌日
- 使用压缩表加速查找日月食沙罗周期信息 - 优化日月食搜索跳步，减少非食季朔望月扫描 - 新增本地日全食、日环食、月全食搜索接口，返回 ok 区分未找到结果 - 新增水星、金星地心凌日查询及测试
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70
README.en.md
70
README.en.md
@ -46,7 +46,7 @@ go get b612.me/astro
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- Lunar position, rise/set, Earth distance, phase, new/full/quarter times, apparent diameter, bright-limb angle, parallactic angle, geocentric/topocentric libration, apsides, nodes, maximum declination
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- Lunar position, rise/set, Earth distance, phase, new/full/quarter times, apparent diameter, bright-limb angle, parallactic angle, geocentric/topocentric libration, apsides, nodes, maximum declination
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- `lite/sun` and `lite/moon` lightweight approximation chains for watches, frontends, mini programs, and other resource-constrained environments
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- `lite/sun` and `lite/moon` lightweight approximation chains for watches, frontends, mini programs, and other resource-constrained environments
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- Global and local solar/lunar eclipses, solar central paths, partial footprints, visible local lunar eclipses, Saros metadata, and SVG diagrams
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- Global and local solar/lunar eclipses, solar central paths, partial footprints, visible local lunar eclipses, Saros metadata, and SVG diagrams
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- Seven major planets with positions, rise/set, conjunction/opposition/station events, quadratures, elongations, nodes, phase, apparent magnitude, apparent diameter, parallactic angle, and physical ephemerides
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- Seven major planets with positions, rise/set, conjunction/opposition/station events, quadratures, elongations, Mercury/Venus geocentric transits, nodes, phase, apparent magnitude, apparent diameter, parallactic angle, and physical ephemerides
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- 9100+ star catalog entries, constellation lookup, proper-motion propagation, rise/set, parallactic angle, and apparent altitude
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- 9100+ star catalog entries, constellation lookup, proper-motion propagation, rise/set, parallactic angle, and apparent altitude
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- Coordinate transforms, topocentric coordinates, sidereal time, precession, nutation, angular distance, refraction, airmass, parallactic angle, and Galactic coordinates
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- Coordinate transforms, topocentric coordinates, sidereal time, precession, nutation, angular distance, refraction, airmass, parallactic angle, and Galactic coordinates
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- Standalone formulas for blackbody radiation, synodic periods, photometry, telescope limiting magnitude, stellar radius/temperature/luminosity relations, and airmass models
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- Standalone formulas for blackbody radiation, synodic periods, photometry, telescope limiting magnitude, stellar radius/temperature/luminosity relations, and airmass models
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@ -63,7 +63,7 @@ go get b612.me/astro
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| `moon` | Lunar position, rise/set, phases, new/full/quarter times, apparent altitude, parallactic angle, diameter, bright-limb angle, geocentric/topocentric libration, apsides, nodes, maximum declination |
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| `moon` | Lunar position, rise/set, phases, new/full/quarter times, apparent altitude, parallactic angle, diameter, bright-limb angle, geocentric/topocentric libration, apsides, nodes, maximum declination |
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| `lite/sun` / `lite/moon` | Lightweight Sun/Moon approximation chains for minute-level rise/set, lightweight sky position, and lunar-phase work |
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| `lite/sun` / `lite/moon` | Lightweight Sun/Moon approximation chains for minute-level rise/set, lightweight sky position, and lunar-phase work |
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| `eclipse` / `eclipse/svg` | Global/local solar and lunar eclipses, solar central paths, partial footprints, local visibility filtering, Saros metadata, SVG output |
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| `eclipse` / `eclipse/svg` | Global/local solar and lunar eclipses, solar central paths, partial footprints, local visibility filtering, Saros metadata, SVG output |
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| `mercury` / `venus` | Positions, rise/set, conjunctions, stations, elongations, phase, parallactic angle, magnitude, diameter, nodes, physical ephemerides |
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| `mercury` / `venus` | Positions, rise/set, conjunctions, stations, elongations, geocentric transits, phase, parallactic angle, magnitude, diameter, nodes, physical ephemerides |
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| `mars` / `jupiter` / `saturn` / `uranus` / `neptune` | Positions, rise/set, conjunction/opposition, stations, quadratures, phase, parallactic angle, magnitude, diameter, nodes, physical ephemerides |
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| `mars` / `jupiter` / `saturn` / `uranus` / `neptune` | Positions, rise/set, conjunction/opposition, stations, quadratures, phase, parallactic angle, magnitude, diameter, nodes, physical ephemerides |
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| `earth` | Earth orbital eccentricity, perihelion, aphelion |
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| `earth` | Earth orbital eccentricity, perihelion, aphelion |
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| `star` | Constellation lookup, star catalog, proper motion / precession / nutation correction, stellar rise/set, parallactic angle, apparent altitude |
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| `star` | Constellation lookup, star catalog, proper motion / precession / nutation correction, stellar rise/set, parallactic angle, apparent altitude |
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@ -674,6 +674,8 @@ Common entry points:
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- `LastSolarEclipse` / `NextSolarEclipse` / `ClosestSolarEclipse`: search global solar eclipses
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- `LastSolarEclipse` / `NextSolarEclipse` / `ClosestSolarEclipse`: search global solar eclipses
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- `LocalSolarEclipseOnDate`: detect whether a site can see a local solar eclipse on that date
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- `LocalSolarEclipseOnDate`: detect whether a site can see a local solar eclipse on that date
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- `LastLocalSolarEclipse` / `NextLocalSolarEclipse` / `ClosestLocalSolarEclipse`: search locally visible solar eclipses
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- `LastLocalSolarEclipse` / `NextLocalSolarEclipse` / `ClosestLocalSolarEclipse`: search locally visible solar eclipses
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- `LastLocalTotalSolarEclipse` / `NextLocalTotalSolarEclipse` / `ClosestLocalTotalSolarEclipse`: search locally visible total solar eclipses, returning `(info, ok)`
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- `LastLocalAnnularSolarEclipse` / `NextLocalAnnularSolarEclipse` / `ClosestLocalAnnularSolarEclipse`: search locally visible annular solar eclipses, returning `(info, ok)`
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- `SolarEclipseCentralPath`: compute central line, northern/southern limits, and greatest-eclipse point
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- `SolarEclipseCentralPath`: compute central line, northern/southern limits, and greatest-eclipse point
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- `SolarEclipsePartialFootprints`: compute the partial-eclipse penumbral footprint on Earth
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- `SolarEclipsePartialFootprints`: compute the partial-eclipse penumbral footprint on Earth
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- `eclipse/svg.LocalSolarEclipseSVG`: render a local solar-disk SVG
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- `eclipse/svg.LocalSolarEclipseSVG`: render a local solar-disk SVG
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@ -925,6 +927,7 @@ Common entry points:
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- `LastLunarEclipse` / `NextLunarEclipse` / `ClosestLunarEclipse`: search global lunar eclipses
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- `LastLunarEclipse` / `NextLunarEclipse` / `ClosestLunarEclipse`: search global lunar eclipses
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- `LocalLunarEclipseOnDate`: detect whether a visible lunar eclipse is visible from a site on a local date
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- `LocalLunarEclipseOnDate`: detect whether a visible lunar eclipse is visible from a site on a local date
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- `LastLocalLunarEclipse` / `NextLocalLunarEclipse` / `ClosestLocalLunarEclipse`: search visible local lunar eclipses
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- `LastLocalLunarEclipse` / `NextLocalLunarEclipse` / `ClosestLocalLunarEclipse`: search visible local lunar eclipses
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- `LastLocalTotalLunarEclipse` / `NextLocalTotalLunarEclipse` / `ClosestLocalTotalLunarEclipse`: search visible local total lunar eclipses, returning `(info, ok)`
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- `GeometricLocalLunarEclipseOnDate`: detect geometric lunar eclipse overlap without filtering by whether the Moon is above the horizon
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- `GeometricLocalLunarEclipseOnDate`: detect geometric lunar eclipse overlap without filtering by whether the Moon is above the horizon
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- `eclipse/svg.LunarEclipseSVG`: render a lunar-eclipse shadow-path SVG
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- `eclipse/svg.LunarEclipseSVG`: render a lunar-eclipse shadow-path SVG
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@ -1191,6 +1194,67 @@ For `date := 2020-01-01 08:08:08 CST`, the output is:
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76.86008484515058 256.8600848451506 // Venus ascending-node and descending-node longitudes, degrees
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76.86008484515058 256.8600848451506 // Venus ascending-node and descending-node longitudes, degrees
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```
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```
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Mercury and Venus also expose `NextTransit` / `LastTransit` / `ClosestTransit` for geocentric planetary transits. "Geocentric" means the planet disk crosses the solar disk as seen from Earth's center; it does not test whether the Sun is above the horizon at a particular observing site. For observing plans, combine this with local solar altitude and weather.
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```go
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package main
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import (
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"fmt"
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"time"
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"b612.me/astro/mercury"
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"b612.me/astro/venus"
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)
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func main() {
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// Next geocentric Mercury transit after the beginning of 2019.
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mercuryTransit := mercury.NextTransit(time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC))
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fmt.Println(mercuryTransit.Valid)
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fmt.Println(mercuryTransit.Start)
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fmt.Println(mercuryTransit.InternalStart)
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fmt.Println(mercuryTransit.Greatest)
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fmt.Println(mercuryTransit.InternalEnd)
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fmt.Println(mercuryTransit.End)
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fmt.Println(mercuryTransit.Duration)
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fmt.Println(mercuryTransit.MinimumSeparationArcsec)
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fmt.Println(mercuryTransit.SunSemidiameterArcsec)
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fmt.Println(mercuryTransit.PlanetSemidiameterArcsec)
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// Next geocentric Venus transit after the beginning of 2012.
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venusTransit := venus.NextTransit(time.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC))
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fmt.Println(venusTransit.Valid)
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fmt.Println(venusTransit.Start)
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fmt.Println(venusTransit.InternalStart)
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fmt.Println(venusTransit.Greatest)
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fmt.Println(venusTransit.InternalEnd)
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fmt.Println(venusTransit.End)
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fmt.Println(venusTransit.Duration)
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}
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```
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Output:
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```text
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true // a valid geocentric Mercury transit was found
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2019-11-11 12:35:31.637522578 +0000 UTC // first contact: Mercury externally enters the solar disk
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2019-11-11 12:37:12.887506484 +0000 UTC // second contact: Mercury is fully inside the solar disk
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2019-11-11 15:19:48.430488109 +0000 UTC // greatest transit: Mercury center is closest to the Sun center
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2019-11-11 18:02:29.246907234 +0000 UTC // third contact: Mercury starts leaving the solar disk
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2019-11-11 18:04:10.707873702 +0000 UTC // fourth contact: Mercury externally leaves the solar disk
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5h28m39.070351124s // geocentric transit duration from first to fourth contact
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75.92460219695154 // minimum Mercury-Sun center separation at greatest transit, arcseconds
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968.8881521396688 // solar semidiameter at greatest transit, arcseconds
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4.978442856283907 // Mercury semidiameter at greatest transit, arcseconds
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true // a valid geocentric Venus transit was found
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2012-06-05 22:09:47.581470608 +0000 UTC // first contact: Venus externally enters the solar disk
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2012-06-05 22:27:35.979940295 +0000 UTC // second contact: Venus is fully inside the solar disk
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2012-06-06 01:29:35.686955451 +0000 UTC // greatest transit: Venus center is closest to the Sun center
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2012-06-06 04:31:35.18302828 +0000 UTC // third contact: Venus starts leaving the solar disk
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2012-06-06 04:49:23.581457734 +0000 UTC // fourth contact: Venus externally leaves the solar disk
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6h39m35.999987126s // geocentric transit duration from first to fourth contact
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```
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#### Outer planets
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#### Outer planets
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```go
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```go
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@ -1767,7 +1831,7 @@ Notes:
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- `lite/sun` and `lite/moon` lightweight Sun/Moon chains for minute-level rise/set, lightweight position, and lunar-phase work
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- `lite/sun` and `lite/moon` lightweight Sun/Moon chains for minute-level rise/set, lightweight position, and lunar-phase work
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- Earth eccentricity, Sun-Earth distance, perihelion, aphelion
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- Earth eccentricity, Sun-Earth distance, perihelion, aphelion
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- Apparent/mean sidereal time, constellation lookup, common coordinate transforms, refraction, airmass, parallactic angle, Galactic coordinates
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- Apparent/mean sidereal time, constellation lookup, common coordinate transforms, refraction, airmass, parallactic angle, Galactic coordinates
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- Seven major-planet coordinates, Sun/body and Earth/body distances, special events, physical ephemerides, apparent diameters, phases, parallactic angles, and nodes
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- Seven major-planet coordinates, Sun/body and Earth/body distances, special events, Mercury/Venus geocentric transits, physical ephemerides, apparent diameters, phases, parallactic angles, and nodes
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- Chinese lunisolar calendar conversion from 104 BCE to 3000 CE
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- Chinese lunisolar calendar conversion from 104 BCE to 3000 CE
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- 9100+ star catalog
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- 9100+ star catalog
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- Generic small-body orbit propagation, H-G apparent magnitude, visual-binary position angle and separation
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- Generic small-body orbit propagation, H-G apparent magnitude, visual-binary position angle and separation
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70
README.md
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README.md
@ -44,7 +44,7 @@ go get b612.me/astro
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- 🌙 **月亮计算**：天球位置、月出月落、地月距离、月相、朔望时间、视直径、亮边位置角、视差角、地心/站心天平动、近远地点、交点、最大赤纬等
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- 🌙 **月亮计算**：天球位置、月出月落、地月距离、月相、朔望时间、视直径、亮边位置角、视差角、地心/站心天平动、近远地点、交点、最大赤纬等
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- 🪶 **轻量链路**：`lite/sun` 与 `lite/moon` 提供面向手表、前端、小程序和其它资源受限环境的轻量近似太阳/月亮算法，覆盖天球位置、升落和月相
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- 🪶 **轻量链路**：`lite/sun` 与 `lite/moon` 提供面向手表、前端、小程序和其它资源受限环境的轻量近似太阳/月亮算法，覆盖天球位置、升落和月相
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- 🌗 **日月食**：全局日食、站心日食、中心线/偏食足迹、月食、地方可见月食与 SVG 示意图
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- 🌗 **日月食**：全局日食、站心日食、中心线/偏食足迹、月食、地方可见月食与 SVG 示意图
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- 🪐 **行星计算**：七大行星天球位置、升落时间、合冲留等特殊天象时间、升交点/降交点、视直径/视半径、相位、视差角、节点、视星等与物理星历
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- 🪐 **行星计算**：七大行星天球位置、升落时间、合冲留、大距、水星/金星地心凌日等特殊天象时间、升交点/降交点、视直径/视半径、相位、视差角、节点、视星等与物理星历
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- ⭐ **恒星计算**：指定天球坐标所属星座；同时包含9100颗恒星数据库，可计算升降时间、视差角和视高度角，获取指定日期的恒星坐标信息
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- ⭐ **恒星计算**：指定天球坐标所属星座；同时包含9100颗恒星数据库，可计算升降时间、视差角和视高度角，获取指定日期的恒星坐标信息
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- 🧭 **坐标工具**：黄道/赤道/地平坐标转换、站心坐标、恒星时、岁差、章动、角距离、大气折射、大气质量、视差角、银道坐标
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- 🧭 **坐标工具**：黄道/赤道/地平坐标转换、站心坐标、恒星时、岁差、章动、角距离、大气折射、大气质量、视差角、银道坐标
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- 🔭 **研究公式**：黑体辐射、会合周期、星等距离换算、望远镜极限星等、恒星半径/温度/光度换算、大气质量模型
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- 🔭 **研究公式**：黑体辐射、会合周期、星等距离换算、望远镜极限星等、恒星半径/温度/光度换算、大气质量模型
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@ -61,7 +61,7 @@ go get b612.me/astro
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| `moon` | 月亮位置、月出月落、月相、朔望弦、视高度角、视差角、视直径、亮边位置角、地心/站心天平动、近远地点、交点、最大赤纬 |
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| `moon` | 月亮位置、月出月落、月相、朔望弦、视高度角、视差角、视直径、亮边位置角、地心/站心天平动、近远地点、交点、最大赤纬 |
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| `lite/sun` / `lite/moon` | 轻量太阳/月亮近似链路，面向分钟级升落、轻量天球位置和月相计算 |
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| `lite/sun` / `lite/moon` | 轻量太阳/月亮近似链路，面向分钟级升落、轻量天球位置和月相计算 |
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| `eclipse` / `eclipse/svg` | 全局/局地日月食、日食中心线与偏食足迹、局地可见性筛选、日月食 SVG |
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| `eclipse` / `eclipse/svg` | 全局/局地日月食、日食中心线与偏食足迹、局地可见性筛选、日月食 SVG |
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| `mercury` / `venus` | 水星、金星位置、升落、合日、留、大距、相位、视差角、视星等、视直径、节点和物理星历 |
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| `mercury` / `venus` | 水星、金星位置、升落、合日、留、大距、地心凌日、相位、视差角、视星等、视直径、节点和物理星历 |
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| `mars` / `jupiter` / `saturn` / `uranus` / `neptune` | 外行星位置、升落、合冲、留、方照、相位、视差角、视星等、视直径、节点和物理星历 |
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| `mars` / `jupiter` / `saturn` / `uranus` / `neptune` | 外行星位置、升落、合冲、留、方照、相位、视差角、视星等、视直径、节点和物理星历 |
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| `earth` | 地球轨道偏心率、近日点、远日点 |
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| `earth` | 地球轨道偏心率、近日点、远日点 |
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| `star` | 星座判定、恒星数据库、恒星自行/岁差/章动修正、恒星升落、视差角、视高度角 |
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| `star` | 星座判定、恒星数据库、恒星自行/岁差/章动修正、恒星升落、视差角、视高度角 |
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- `LastSolarEclipse` / `NextSolarEclipse` / `ClosestSolarEclipse`：搜索全局日食
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- `LastSolarEclipse` / `NextSolarEclipse` / `ClosestSolarEclipse`：搜索全局日食
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- `LocalSolarEclipseOnDate`：判断某地当天是否能看到站心日食
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- `LocalSolarEclipseOnDate`：判断某地当天是否能看到站心日食
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- `LastLocalSolarEclipse` / `NextLocalSolarEclipse` / `ClosestLocalSolarEclipse`：搜索某地可见的站心日食
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- `LastLocalSolarEclipse` / `NextLocalSolarEclipse` / `ClosestLocalSolarEclipse`：搜索某地可见的站心日食
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- `LastLocalTotalSolarEclipse` / `NextLocalTotalSolarEclipse` / `ClosestLocalTotalSolarEclipse`：搜索某地可见的日全食，返回 `(info, ok)`
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- `LastLocalAnnularSolarEclipse` / `NextLocalAnnularSolarEclipse` / `ClosestLocalAnnularSolarEclipse`：搜索某地可见的日环食，返回 `(info, ok)`
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- `SolarEclipseCentralPath`：计算中心线、南北界和食甚点
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- `SolarEclipseCentralPath`：计算中心线、南北界和食甚点
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- `SolarEclipsePartialFootprints`：计算偏食半影在地球表面的足迹
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- `SolarEclipsePartialFootprints`：计算偏食半影在地球表面的足迹
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- `eclipse/svg.LocalSolarEclipseSVG`：生成某地的日面视圆 SVG
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- `eclipse/svg.LocalSolarEclipseSVG`：生成某地的日面视圆 SVG
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@ -995,6 +997,7 @@ true 13424 // 北京日全食 SVG 生成成功，长度 13424 字节
|
|||||||
- `LastLunarEclipse` / `NextLunarEclipse` / `ClosestLunarEclipse`：搜索全局月食
|
- `LastLunarEclipse` / `NextLunarEclipse` / `ClosestLunarEclipse`：搜索全局月食
|
||||||
- `LocalLunarEclipseOnDate`：判断某地当天是否能看到可见月食
|
- `LocalLunarEclipseOnDate`：判断某地当天是否能看到可见月食
|
||||||
- `LastLocalLunarEclipse` / `NextLocalLunarEclipse` / `ClosestLocalLunarEclipse`：搜索某地可见月食
|
- `LastLocalLunarEclipse` / `NextLocalLunarEclipse` / `ClosestLocalLunarEclipse`：搜索某地可见月食
|
||||||
|
- `LastLocalTotalLunarEclipse` / `NextLocalTotalLunarEclipse` / `ClosestLocalTotalLunarEclipse`：搜索某地可见月全食，返回 `(info, ok)`
|
||||||
- `GeometricLocalLunarEclipseOnDate`：判断某地当天是否发生几何月食，不做“月亮在地平线上方”的可见性过滤
|
- `GeometricLocalLunarEclipseOnDate`：判断某地当天是否发生几何月食，不做“月亮在地平线上方”的可见性过滤
|
||||||
- `eclipse/svg.LunarEclipseSVG`：生成月食穿影图 SVG
|
- `eclipse/svg.LunarEclipseSVG`：生成月食穿影图 SVG
|
||||||
|
|
||||||
@ -1267,6 +1270,67 @@ fmt.Println(venus.AscendingNode(date), venus.DescendingNode(date))
|
|||||||
76.86008484515058 256.8600848451506 // 金星升交点、降交点黄经，单位度
|
76.86008484515058 256.8600848451506 // 金星升交点、降交点黄经，单位度
|
||||||
```
|
```
|
||||||
|
|
||||||
|
水星和金星还提供 `NextTransit` / `LastTransit` / `ClosestTransit` 地心凌日查询。这里的“地心”指从地球中心看到的行星圆面经过太阳圆面，不判断某个地点当时太阳是否在地平线上；如果要做观测计划，还需要结合本地太阳高度角和天气条件。
|
||||||
|
|
||||||
|
```go
|
||||||
|
package main
|
||||||
|
|
||||||
|
import (
|
||||||
|
"fmt"
|
||||||
|
"time"
|
||||||
|
|
||||||
|
"b612.me/astro/mercury"
|
||||||
|
"b612.me/astro/venus"
|
||||||
|
)
|
||||||
|
|
||||||
|
func main() {
|
||||||
|
// 查询 2019 年之后下一次地心水星凌日。
|
||||||
|
mercuryTransit := mercury.NextTransit(time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC))
|
||||||
|
fmt.Println(mercuryTransit.Valid)
|
||||||
|
fmt.Println(mercuryTransit.Start)
|
||||||
|
fmt.Println(mercuryTransit.InternalStart)
|
||||||
|
fmt.Println(mercuryTransit.Greatest)
|
||||||
|
fmt.Println(mercuryTransit.InternalEnd)
|
||||||
|
fmt.Println(mercuryTransit.End)
|
||||||
|
fmt.Println(mercuryTransit.Duration)
|
||||||
|
fmt.Println(mercuryTransit.MinimumSeparationArcsec)
|
||||||
|
fmt.Println(mercuryTransit.SunSemidiameterArcsec)
|
||||||
|
fmt.Println(mercuryTransit.PlanetSemidiameterArcsec)
|
||||||
|
|
||||||
|
// 查询 2012 年之后下一次地心金星凌日。
|
||||||
|
venusTransit := venus.NextTransit(time.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC))
|
||||||
|
fmt.Println(venusTransit.Valid)
|
||||||
|
fmt.Println(venusTransit.Start)
|
||||||
|
fmt.Println(venusTransit.InternalStart)
|
||||||
|
fmt.Println(venusTransit.Greatest)
|
||||||
|
fmt.Println(venusTransit.InternalEnd)
|
||||||
|
fmt.Println(venusTransit.End)
|
||||||
|
fmt.Println(venusTransit.Duration)
|
||||||
|
}
|
||||||
|
```
|
||||||
|
|
||||||
|
输出结果：
|
||||||
|
|
||||||
|
```text
|
||||||
|
true // 找到一次有效的地心水星凌日
|
||||||
|
2019-11-11 12:35:31.637522578 +0000 UTC // 一触：水星外切进入太阳圆面
|
||||||
|
2019-11-11 12:37:12.887506484 +0000 UTC // 二触：水星完全进入太阳圆面
|
||||||
|
2019-11-11 15:19:48.430488109 +0000 UTC // 凌甚：水星中心最接近太阳中心
|
||||||
|
2019-11-11 18:02:29.246907234 +0000 UTC // 三触：水星开始离开太阳圆面
|
||||||
|
2019-11-11 18:04:10.707873702 +0000 UTC // 四触：水星外切离开太阳圆面
|
||||||
|
5h28m39.070351124s // 一触到四触的地心凌日持续时间
|
||||||
|
75.92460219695154 // 凌甚时水星中心与太阳中心的最小角距离，单位角秒
|
||||||
|
968.8881521396688 // 凌甚时太阳视半径，单位角秒
|
||||||
|
4.978442856283907 // 凌甚时水星视半径，单位角秒
|
||||||
|
true // 找到一次有效的地心金星凌日
|
||||||
|
2012-06-05 22:09:47.581470608 +0000 UTC // 一触：金星外切进入太阳圆面
|
||||||
|
2012-06-05 22:27:35.979940295 +0000 UTC // 二触：金星完全进入太阳圆面
|
||||||
|
2012-06-06 01:29:35.686955451 +0000 UTC // 凌甚：金星中心最接近太阳中心
|
||||||
|
2012-06-06 04:31:35.18302828 +0000 UTC // 三触：金星开始离开太阳圆面
|
||||||
|
2012-06-06 04:49:23.581457734 +0000 UTC // 四触：金星外切离开太阳圆面
|
||||||
|
6h39m35.999987126s // 一触到四触的地心凌日持续时间
|
||||||
|
```
|
||||||
|
|
||||||
#### 外行星
|
#### 外行星
|
||||||
|
|
||||||
```go
|
```go
|
||||||
@ -1849,7 +1913,7 @@ func main() {
|
|||||||
- ✅ `lite/sun`、`lite/moon` 轻量太阳/月亮链路：面向分钟级升落、轻量位置和月相计算
|
- ✅ `lite/sun`、`lite/moon` 轻量太阳/月亮链路：面向分钟级升落、轻量位置和月相计算
|
||||||
- ✅ 地球偏心率、日地距离、近日点、远日点
|
- ✅ 地球偏心率、日地距离、近日点、远日点
|
||||||
- ✅ 真平恒星时、星座计算、常用坐标转换、大气折射、大气质量、视差角、银道坐标
|
- ✅ 真平恒星时、星座计算、常用坐标转换、大气折射、大气质量、视差角、银道坐标
|
||||||
- ✅ 七大行星坐标、距日距地距离、特殊天象、物理星历、视直径、相位、视差角与节点
|
- ✅ 七大行星坐标、距日距地距离、特殊天象、水星/金星地心凌日、物理星历、视直径、相位、视差角与节点
|
||||||
- ✅ 公农历转换（公元前104年-公元3000年）
|
- ✅ 公农历转换（公元前104年-公元3000年）
|
||||||
- ✅ 9100+恒星数据库
|
- ✅ 9100+恒星数据库
|
||||||
- ✅ 通用小天体轨道传播、H-G 视星等、视双星位置角/角距
|
- ✅ 通用小天体轨道传播、H-G 视星等、视双星位置角/角距
|
||||||
|
|||||||
520
basic/planet_transit.go
Normal file
520
basic/planet_transit.go
Normal file
@ -0,0 +1,520 @@
|
|||||||
|
package basic
|
||||||
|
|
||||||
|
import (
|
||||||
|
"math"
|
||||||
|
|
||||||
|
. "b612.me/astro/tools"
|
||||||
|
)
|
||||||
|
|
||||||
|
const (
|
||||||
|
planetTransitMeanSolarMotionDegPerDay = 360.0 / 365.2422
|
||||||
|
planetTransitTropicalYearDays = 365.2422
|
||||||
|
planetTransitSeasonProbeStepDays = 20.0
|
||||||
|
planetTransitSearchLimit = 2400
|
||||||
|
planetTransitSearchEpsilonDays = 1.0 / 86400.0
|
||||||
|
planetTransitGreatestWindowDays = 1.2
|
||||||
|
planetTransitGreatestToleranceDays = 0.25 / 86400.0
|
||||||
|
planetTransitContactStepDays = 0.02
|
||||||
|
planetTransitContactSpanDays = 1.0
|
||||||
|
planetTransitContactToleranceDays = 0.25 / 86400.0
|
||||||
|
planetTransitCoarseN = 16
|
||||||
|
)
|
||||||
|
|
||||||
|
// PlanetTransitResult 表示一次地心行星凌日结果。
|
||||||
|
//
|
||||||
|
// Valid 为 false 时表示没有找到有效凌日。所有时刻字段均为 UT 儒略日。
|
||||||
|
// MinimumSeparationArcsec、SunSemidiameterArcsec、PlanetSemidiameterArcsec 的单位均为角秒。
|
||||||
|
type PlanetTransitResult struct {
|
||||||
|
Valid bool
|
||||||
|
|
||||||
|
// PlanetIndex 为行星序号，1 表示水星，2 表示金星。
|
||||||
|
PlanetIndex int
|
||||||
|
|
||||||
|
// ExternalIngress / ExternalEgress 为一触 / 四触。
|
||||||
|
ExternalIngress float64
|
||||||
|
ExternalEgress float64
|
||||||
|
// InternalIngress / InternalEgress 为二触 / 三触。掠凌没有内切接触时为 0。
|
||||||
|
InternalIngress float64
|
||||||
|
InternalEgress float64
|
||||||
|
// Greatest 为凌甚，即行星中心最接近太阳中心的时刻。
|
||||||
|
Greatest float64
|
||||||
|
|
||||||
|
MinimumSeparationArcsec float64
|
||||||
|
SunSemidiameterArcsec float64
|
||||||
|
PlanetSemidiameterArcsec float64
|
||||||
|
|
||||||
|
HasExternal bool
|
||||||
|
HasInternal bool
|
||||||
|
}
|
||||||
|
|
||||||
|
type planetTransitConfig struct {
|
||||||
|
planetIndex int
|
||||||
|
|
||||||
|
synodicPeriodDays float64
|
||||||
|
anchorInferiorTT float64
|
||||||
|
|
||||||
|
seasonWindowDays float64
|
||||||
|
latitudePrefilter float64
|
||||||
|
conjunctionStepDay float64
|
||||||
|
|
||||||
|
apparentLoN func(float64, int) float64
|
||||||
|
apparentBoN func(float64, int) float64
|
||||||
|
apparentRaDecN func(float64, int) (float64, float64)
|
||||||
|
semidiameterN func(float64, int) float64
|
||||||
|
earthDistanceN func(float64, int) float64
|
||||||
|
nodeN func(float64, int) float64
|
||||||
|
}
|
||||||
|
|
||||||
|
type planetTransitState struct {
|
||||||
|
jdTT float64
|
||||||
|
separationArcsec float64
|
||||||
|
separationSquared float64
|
||||||
|
sunSemidiameter float64
|
||||||
|
planetSemidiameter float64
|
||||||
|
externalContactMetric float64
|
||||||
|
internalContactMetric float64
|
||||||
|
}
|
||||||
|
|
||||||
|
func mercuryTransitConfig() planetTransitConfig {
|
||||||
|
return planetTransitConfig{
|
||||||
|
planetIndex: 1,
|
||||||
|
synodicPeriodDays: MERCURY_S_PERIOD,
|
||||||
|
anchorInferiorTT: TD2UT(JDECalc(2019, 11, 11+(15+21.0/60+40.0/3600)/24), true),
|
||||||
|
seasonWindowDays: 12,
|
||||||
|
latitudePrefilter: 1.0,
|
||||||
|
conjunctionStepDay: 0.00001,
|
||||||
|
apparentLoN: MercuryApparentLoN,
|
||||||
|
apparentBoN: MercuryApparentBoN,
|
||||||
|
apparentRaDecN: MercuryApparentRaDecN,
|
||||||
|
semidiameterN: MercurySemidiameterN,
|
||||||
|
earthDistanceN: EarthMercuryAwayN,
|
||||||
|
nodeN: MercuryAscendingNodeN,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func venusTransitConfig() planetTransitConfig {
|
||||||
|
return planetTransitConfig{
|
||||||
|
planetIndex: 2,
|
||||||
|
synodicPeriodDays: VENUS_S_PERIOD,
|
||||||
|
anchorInferiorTT: TD2UT(JDECalc(2012, 6, 6+(1+29.0/60)/24), true),
|
||||||
|
seasonWindowDays: 8,
|
||||||
|
latitudePrefilter: 0.8,
|
||||||
|
conjunctionStepDay: 0.00001,
|
||||||
|
apparentLoN: VenusApparentLoN,
|
||||||
|
apparentBoN: VenusApparentBoN,
|
||||||
|
apparentRaDecN: VenusApparentRaDecN,
|
||||||
|
semidiameterN: VenusSemidiameterN,
|
||||||
|
earthDistanceN: EarthVenusAwayN,
|
||||||
|
nodeN: VenusAscendingNodeN,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// NextMercuryTransit 返回给定时刻之后的下一次地心水星凌日。
|
||||||
|
func NextMercuryTransit(jde float64) PlanetTransitResult {
|
||||||
|
result, _ := searchPlanetTransit(jde, mercuryTransitConfig(), 1, false)
|
||||||
|
return result
|
||||||
|
}
|
||||||
|
|
||||||
|
// LastMercuryTransit 返回给定时刻之前的上一次地心水星凌日。
|
||||||
|
func LastMercuryTransit(jde float64) PlanetTransitResult {
|
||||||
|
result, _ := searchPlanetTransit(jde, mercuryTransitConfig(), -1, true)
|
||||||
|
return result
|
||||||
|
}
|
||||||
|
|
||||||
|
// ClosestMercuryTransit 返回距给定时刻最近的一次地心水星凌日。
|
||||||
|
func ClosestMercuryTransit(jde float64) PlanetTransitResult {
|
||||||
|
return closestPlanetTransit(jde, mercuryTransitConfig())
|
||||||
|
}
|
||||||
|
|
||||||
|
// NextVenusTransit 返回给定时刻之后的下一次地心金星凌日。
|
||||||
|
func NextVenusTransit(jde float64) PlanetTransitResult {
|
||||||
|
result, _ := searchPlanetTransit(jde, venusTransitConfig(), 1, false)
|
||||||
|
return result
|
||||||
|
}
|
||||||
|
|
||||||
|
// LastVenusTransit 返回给定时刻之前的上一次地心金星凌日。
|
||||||
|
func LastVenusTransit(jde float64) PlanetTransitResult {
|
||||||
|
result, _ := searchPlanetTransit(jde, venusTransitConfig(), -1, true)
|
||||||
|
return result
|
||||||
|
}
|
||||||
|
|
||||||
|
// ClosestVenusTransit 返回距给定时刻最近的一次地心金星凌日。
|
||||||
|
func ClosestVenusTransit(jde float64) PlanetTransitResult {
|
||||||
|
return closestPlanetTransit(jde, venusTransitConfig())
|
||||||
|
}
|
||||||
|
|
||||||
|
func closestPlanetTransit(jde float64, cfg planetTransitConfig) PlanetTransitResult {
|
||||||
|
last, hasLast := searchPlanetTransit(jde, cfg, -1, true)
|
||||||
|
next, hasNext := searchPlanetTransit(jde, cfg, 1, false)
|
||||||
|
switch {
|
||||||
|
case hasLast && !hasNext:
|
||||||
|
return last
|
||||||
|
case !hasLast && hasNext:
|
||||||
|
return next
|
||||||
|
case !hasLast && !hasNext:
|
||||||
|
return PlanetTransitResult{}
|
||||||
|
}
|
||||||
|
if math.Abs(last.Greatest-jde) <= math.Abs(next.Greatest-jde) {
|
||||||
|
return last
|
||||||
|
}
|
||||||
|
return next
|
||||||
|
}
|
||||||
|
|
||||||
|
func searchPlanetTransit(jde float64, cfg planetTransitConfig, direction int, includeCurrent bool) (PlanetTransitResult, bool) {
|
||||||
|
if !isFiniteFloat(jde) || direction == 0 {
|
||||||
|
return PlanetTransitResult{}, false
|
||||||
|
}
|
||||||
|
|
||||||
|
targetTT := TD2UT(jde, true)
|
||||||
|
probeTT := targetTT
|
||||||
|
for i := 0; i < planetTransitSearchLimit; i++ {
|
||||||
|
seasonTT, ok := nextPlanetTransitSeasonTT(probeTT, cfg, direction)
|
||||||
|
if !ok {
|
||||||
|
return PlanetTransitResult{}, false
|
||||||
|
}
|
||||||
|
|
||||||
|
seedTT := nearestPlanetTransitInferiorSeedTT(seasonTT, cfg)
|
||||||
|
if math.Abs(seedTT-seasonTT) <= cfg.seasonWindowDays {
|
||||||
|
conjunctionTT := refinePlanetTransitInferiorConjunctionTT(seedTT, cfg)
|
||||||
|
if math.Abs(conjunctionTT-seasonTT) <= cfg.seasonWindowDays+1 && isPotentialPlanetTransit(conjunctionTT, cfg) {
|
||||||
|
resultTT, ok := planetTransitAtInferiorConjunctionTT(conjunctionTT, cfg)
|
||||||
|
if ok && planetTransitMatchesDirection(resultTT.Greatest, targetTT, direction, includeCurrent) {
|
||||||
|
return planetTransitResultTTToUT(resultTT), true
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
probeTT = seasonTT + float64(direction)*planetTransitSeasonProbeStepDays
|
||||||
|
}
|
||||||
|
|
||||||
|
return PlanetTransitResult{}, false
|
||||||
|
}
|
||||||
|
|
||||||
|
func nextPlanetTransitSeasonTT(jdTT float64, cfg planetTransitConfig, direction int) (float64, bool) {
|
||||||
|
best := math.NaN()
|
||||||
|
for nodeOffset := 0; nodeOffset <= 1; nodeOffset++ {
|
||||||
|
candidate := estimatePlanetTransitSeasonTT(jdTT, cfg, nodeOffset, direction)
|
||||||
|
candidate = refinePlanetTransitSeasonTT(candidate, cfg, nodeOffset)
|
||||||
|
for !planetTransitMatchesDirection(candidate, jdTT, direction, false) {
|
||||||
|
candidate += float64(direction) * planetTransitTropicalYearDays
|
||||||
|
candidate = refinePlanetTransitSeasonTT(candidate, cfg, nodeOffset)
|
||||||
|
}
|
||||||
|
if !isFiniteFloat(best) || math.Abs(candidate-jdTT) < math.Abs(best-jdTT) {
|
||||||
|
best = candidate
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if !isFiniteFloat(best) {
|
||||||
|
return 0, false
|
||||||
|
}
|
||||||
|
return best, true
|
||||||
|
}
|
||||||
|
|
||||||
|
func estimatePlanetTransitSeasonTT(jdTT float64, cfg planetTransitConfig, nodeOffset int, direction int) float64 {
|
||||||
|
sunLongitude := HSunApparentLoN(jdTT, planetTransitCoarseN)
|
||||||
|
nodeLongitude := planetTransitNodeLongitude(jdTT, cfg, nodeOffset, planetTransitCoarseN)
|
||||||
|
if direction > 0 {
|
||||||
|
delta := Limit360(nodeLongitude - sunLongitude)
|
||||||
|
if delta <= planetTransitSearchEpsilonDays {
|
||||||
|
delta += 360
|
||||||
|
}
|
||||||
|
return jdTT + delta/planetTransitMeanSolarMotionDegPerDay
|
||||||
|
}
|
||||||
|
delta := Limit360(sunLongitude - nodeLongitude)
|
||||||
|
if delta <= planetTransitSearchEpsilonDays {
|
||||||
|
delta += 360
|
||||||
|
}
|
||||||
|
return jdTT - delta/planetTransitMeanSolarMotionDegPerDay
|
||||||
|
}
|
||||||
|
|
||||||
|
func refinePlanetTransitSeasonTT(seedTT float64, cfg planetTransitConfig, nodeOffset int) float64 {
|
||||||
|
current := seedTT
|
||||||
|
for i := 0; i < 8; i++ {
|
||||||
|
prev := current
|
||||||
|
value := planetTransitSunNodeLongitudeDelta(prev, cfg, nodeOffset)
|
||||||
|
slope := (planetTransitSunNodeLongitudeDelta(prev+0.5, cfg, nodeOffset) -
|
||||||
|
planetTransitSunNodeLongitudeDelta(prev-0.5, cfg, nodeOffset)) / 1.0
|
||||||
|
if slope == 0 || !isFiniteFloat(slope) {
|
||||||
|
break
|
||||||
|
}
|
||||||
|
current = prev - value/slope
|
||||||
|
if math.Abs(current-prev) <= 0.00001 {
|
||||||
|
break
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return current
|
||||||
|
}
|
||||||
|
|
||||||
|
func planetTransitSunNodeLongitudeDelta(jdTT float64, cfg planetTransitConfig, nodeOffset int) float64 {
|
||||||
|
return planetTransitAngleDelta(HSunApparentLoN(jdTT, planetTransitCoarseN) -
|
||||||
|
planetTransitNodeLongitude(jdTT, cfg, nodeOffset, planetTransitCoarseN))
|
||||||
|
}
|
||||||
|
|
||||||
|
func planetTransitNodeLongitude(jdTT float64, cfg planetTransitConfig, nodeOffset int, n int) float64 {
|
||||||
|
return Limit360(cfg.nodeN(jdTT, n) + float64(nodeOffset)*180)
|
||||||
|
}
|
||||||
|
|
||||||
|
func nearestPlanetTransitInferiorSeedTT(seasonTT float64, cfg planetTransitConfig) float64 {
|
||||||
|
k := math.Round((seasonTT - cfg.anchorInferiorTT) / cfg.synodicPeriodDays)
|
||||||
|
return cfg.anchorInferiorTT + k*cfg.synodicPeriodDays
|
||||||
|
}
|
||||||
|
|
||||||
|
func refinePlanetTransitInferiorConjunctionTT(seedTT float64, cfg planetTransitConfig) float64 {
|
||||||
|
current := seedTT
|
||||||
|
for i := 0; i < 4; i++ {
|
||||||
|
prev := current
|
||||||
|
value := planetTransitLongitudeDeltaN(prev, cfg, planetTransitCoarseN)
|
||||||
|
slope := (planetTransitLongitudeDeltaN(prev+cfg.conjunctionStepDay, cfg, planetTransitCoarseN) -
|
||||||
|
planetTransitLongitudeDeltaN(prev-cfg.conjunctionStepDay, cfg, planetTransitCoarseN)) / (2 * cfg.conjunctionStepDay)
|
||||||
|
if slope == 0 || !isFiniteFloat(slope) {
|
||||||
|
break
|
||||||
|
}
|
||||||
|
current = prev - value/slope
|
||||||
|
if math.Abs(current-prev) <= 30.0/86400.0 {
|
||||||
|
break
|
||||||
|
}
|
||||||
|
}
|
||||||
|
for i := 0; i < 8; i++ {
|
||||||
|
prev := current
|
||||||
|
value := planetTransitLongitudeDeltaN(prev, cfg, -1)
|
||||||
|
slope := (planetTransitLongitudeDeltaN(prev+cfg.conjunctionStepDay, cfg, -1) -
|
||||||
|
planetTransitLongitudeDeltaN(prev-cfg.conjunctionStepDay, cfg, -1)) / (2 * cfg.conjunctionStepDay)
|
||||||
|
if slope == 0 || !isFiniteFloat(slope) {
|
||||||
|
break
|
||||||
|
}
|
||||||
|
current = prev - value/slope
|
||||||
|
if math.Abs(current-prev) <= cfg.conjunctionStepDay {
|
||||||
|
break
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return current
|
||||||
|
}
|
||||||
|
|
||||||
|
func planetTransitLongitudeDeltaN(jdTT float64, cfg planetTransitConfig, n int) float64 {
|
||||||
|
return planetTransitAngleDelta(cfg.apparentLoN(jdTT, n) - HSunApparentLoN(jdTT, n))
|
||||||
|
}
|
||||||
|
|
||||||
|
func isPotentialPlanetTransit(conjunctionTT float64, cfg planetTransitConfig) bool {
|
||||||
|
if cfg.earthDistanceN(conjunctionTT, planetTransitCoarseN) > EarthAwayN(conjunctionTT, planetTransitCoarseN) {
|
||||||
|
return false
|
||||||
|
}
|
||||||
|
return math.Abs(cfg.apparentBoN(conjunctionTT, planetTransitCoarseN)) <= cfg.latitudePrefilter
|
||||||
|
}
|
||||||
|
|
||||||
|
func planetTransitAtInferiorConjunctionTT(conjunctionTT float64, cfg planetTransitConfig) (PlanetTransitResult, bool) {
|
||||||
|
greatestTT := greatestPlanetTransitTT(conjunctionTT, cfg)
|
||||||
|
greatestState := planetTransitStateAt(greatestTT, cfg, -1)
|
||||||
|
if !isFiniteFloat(greatestState.externalContactMetric) || greatestState.externalContactMetric > 0 {
|
||||||
|
return PlanetTransitResult{}, false
|
||||||
|
}
|
||||||
|
|
||||||
|
result := PlanetTransitResult{
|
||||||
|
Valid: true,
|
||||||
|
PlanetIndex: cfg.planetIndex,
|
||||||
|
Greatest: greatestTT,
|
||||||
|
MinimumSeparationArcsec: greatestState.separationArcsec,
|
||||||
|
SunSemidiameterArcsec: greatestState.sunSemidiameter,
|
||||||
|
PlanetSemidiameterArcsec: greatestState.planetSemidiameter,
|
||||||
|
HasExternal: true,
|
||||||
|
HasInternal: greatestState.internalContactMetric <= 0,
|
||||||
|
}
|
||||||
|
|
||||||
|
externalIngress, ok := refinePlanetTransitContactTT(greatestTT, cfg, -1, false)
|
||||||
|
if !ok {
|
||||||
|
return PlanetTransitResult{}, false
|
||||||
|
}
|
||||||
|
externalEgress, ok := refinePlanetTransitContactTT(greatestTT, cfg, 1, false)
|
||||||
|
if !ok || externalEgress <= externalIngress {
|
||||||
|
return PlanetTransitResult{}, false
|
||||||
|
}
|
||||||
|
result.ExternalIngress = externalIngress
|
||||||
|
result.ExternalEgress = externalEgress
|
||||||
|
|
||||||
|
if result.HasInternal {
|
||||||
|
internalIngress, ok := refinePlanetTransitContactTT(greatestTT, cfg, -1, true)
|
||||||
|
if ok {
|
||||||
|
result.InternalIngress = internalIngress
|
||||||
|
}
|
||||||
|
internalEgress, ok := refinePlanetTransitContactTT(greatestTT, cfg, 1, true)
|
||||||
|
if ok && internalEgress > internalIngress {
|
||||||
|
result.InternalEgress = internalEgress
|
||||||
|
}
|
||||||
|
result.HasInternal = result.InternalIngress != 0 && result.InternalEgress != 0
|
||||||
|
}
|
||||||
|
|
||||||
|
return result, true
|
||||||
|
}
|
||||||
|
|
||||||
|
func greatestPlanetTransitTT(seedTT float64, cfg planetTransitConfig) float64 {
|
||||||
|
left := seedTT - planetTransitGreatestWindowDays
|
||||||
|
right := seedTT + planetTransitGreatestWindowDays
|
||||||
|
goldenRatio := (math.Sqrt(5) - 1) / 2
|
||||||
|
|
||||||
|
x1 := right - goldenRatio*(right-left)
|
||||||
|
x2 := left + goldenRatio*(right-left)
|
||||||
|
f1 := planetTransitStateAt(x1, cfg, planetTransitCoarseN).separationSquared
|
||||||
|
f2 := planetTransitStateAt(x2, cfg, planetTransitCoarseN).separationSquared
|
||||||
|
|
||||||
|
for i := 0; i < 80 && right-left > planetTransitGreatestToleranceDays; i++ {
|
||||||
|
if f1 <= f2 {
|
||||||
|
right = x2
|
||||||
|
x2 = x1
|
||||||
|
f2 = f1
|
||||||
|
x1 = right - goldenRatio*(right-left)
|
||||||
|
f1 = planetTransitStateAt(x1, cfg, planetTransitCoarseN).separationSquared
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
left = x1
|
||||||
|
x1 = x2
|
||||||
|
f1 = f2
|
||||||
|
x2 = left + goldenRatio*(right-left)
|
||||||
|
f2 = planetTransitStateAt(x2, cfg, planetTransitCoarseN).separationSquared
|
||||||
|
}
|
||||||
|
|
||||||
|
center := (left + right) / 2
|
||||||
|
left = center - 2.0/24.0
|
||||||
|
right = center + 2.0/24.0
|
||||||
|
x1 = right - goldenRatio*(right-left)
|
||||||
|
x2 = left + goldenRatio*(right-left)
|
||||||
|
f1 = planetTransitStateAt(x1, cfg, -1).separationSquared
|
||||||
|
f2 = planetTransitStateAt(x2, cfg, -1).separationSquared
|
||||||
|
for i := 0; i < 80 && right-left > planetTransitGreatestToleranceDays; i++ {
|
||||||
|
if f1 <= f2 {
|
||||||
|
right = x2
|
||||||
|
x2 = x1
|
||||||
|
f2 = f1
|
||||||
|
x1 = right - goldenRatio*(right-left)
|
||||||
|
f1 = planetTransitStateAt(x1, cfg, -1).separationSquared
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
left = x1
|
||||||
|
x1 = x2
|
||||||
|
f1 = f2
|
||||||
|
x2 = left + goldenRatio*(right-left)
|
||||||
|
f2 = planetTransitStateAt(x2, cfg, -1).separationSquared
|
||||||
|
}
|
||||||
|
return (left + right) / 2
|
||||||
|
}
|
||||||
|
|
||||||
|
func planetTransitStateAt(jdTT float64, cfg planetTransitConfig, n int) planetTransitState {
|
||||||
|
planetRA, planetDec := cfg.apparentRaDecN(jdTT, n)
|
||||||
|
sunRA, sunDec := HSunApparentRaDecN(jdTT, n)
|
||||||
|
separationArcsec := StarAngularSeparation(planetRA, planetDec, sunRA, sunDec) * 3600
|
||||||
|
sunSemidiameter := SunSemidiameterN(jdTT, n)
|
||||||
|
planetSemidiameter := cfg.semidiameterN(jdTT, n)
|
||||||
|
return planetTransitState{
|
||||||
|
jdTT: jdTT,
|
||||||
|
separationArcsec: separationArcsec,
|
||||||
|
separationSquared: separationArcsec * separationArcsec,
|
||||||
|
sunSemidiameter: sunSemidiameter,
|
||||||
|
planetSemidiameter: planetSemidiameter,
|
||||||
|
externalContactMetric: separationArcsec - (sunSemidiameter + planetSemidiameter),
|
||||||
|
internalContactMetric: separationArcsec - (sunSemidiameter - planetSemidiameter),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func refinePlanetTransitContactTT(greatestTT float64, cfg planetTransitConfig, direction int, internal bool) (float64, bool) {
|
||||||
|
if direction != -1 && direction != 1 {
|
||||||
|
return 0, false
|
||||||
|
}
|
||||||
|
metric := func(jdTT float64) float64 {
|
||||||
|
state := planetTransitStateAt(jdTT, cfg, -1)
|
||||||
|
if internal {
|
||||||
|
return state.internalContactMetric
|
||||||
|
}
|
||||||
|
return state.externalContactMetric
|
||||||
|
}
|
||||||
|
|
||||||
|
nearJD := greatestTT
|
||||||
|
nearValue := metric(nearJD)
|
||||||
|
if !isFiniteFloat(nearValue) || nearValue > 0 {
|
||||||
|
return 0, false
|
||||||
|
}
|
||||||
|
maxSteps := int(math.Ceil(planetTransitContactSpanDays / planetTransitContactStepDays))
|
||||||
|
for i := 1; i <= maxSteps; i++ {
|
||||||
|
farJD := greatestTT + float64(direction)*planetTransitContactStepDays*float64(i)
|
||||||
|
farValue := metric(farJD)
|
||||||
|
if !isFiniteFloat(farValue) {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
if farValue >= 0 {
|
||||||
|
return bisectPlanetTransitContactTT(nearJD, nearValue, farJD, farValue, metric)
|
||||||
|
}
|
||||||
|
nearJD = farJD
|
||||||
|
nearValue = farValue
|
||||||
|
}
|
||||||
|
return 0, false
|
||||||
|
}
|
||||||
|
|
||||||
|
func bisectPlanetTransitContactTT(leftJD, leftValue, rightJD, rightValue float64, metric func(float64) float64) (float64, bool) {
|
||||||
|
if leftJD > rightJD {
|
||||||
|
leftJD, rightJD = rightJD, leftJD
|
||||||
|
leftValue, rightValue = rightValue, leftValue
|
||||||
|
}
|
||||||
|
if leftValue == 0 {
|
||||||
|
return leftJD, true
|
||||||
|
}
|
||||||
|
if rightValue == 0 {
|
||||||
|
return rightJD, true
|
||||||
|
}
|
||||||
|
if leftValue*rightValue > 0 {
|
||||||
|
return 0, false
|
||||||
|
}
|
||||||
|
|
||||||
|
for i := 0; i < 80 && rightJD-leftJD > planetTransitContactToleranceDays; i++ {
|
||||||
|
midJD := (leftJD + rightJD) / 2
|
||||||
|
midValue := metric(midJD)
|
||||||
|
if !isFiniteFloat(midValue) {
|
||||||
|
return 0, false
|
||||||
|
}
|
||||||
|
if midValue == 0 {
|
||||||
|
return midJD, true
|
||||||
|
}
|
||||||
|
if leftValue*midValue <= 0 {
|
||||||
|
rightJD = midJD
|
||||||
|
rightValue = midValue
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
leftJD = midJD
|
||||||
|
leftValue = midValue
|
||||||
|
}
|
||||||
|
return (leftJD + rightJD) / 2, true
|
||||||
|
}
|
||||||
|
|
||||||
|
func planetTransitResultTTToUT(result PlanetTransitResult) PlanetTransitResult {
|
||||||
|
result.Greatest = TD2UT(result.Greatest, false)
|
||||||
|
result.ExternalIngress = TD2UT(result.ExternalIngress, false)
|
||||||
|
result.ExternalEgress = TD2UT(result.ExternalEgress, false)
|
||||||
|
if result.InternalIngress != 0 {
|
||||||
|
result.InternalIngress = TD2UT(result.InternalIngress, false)
|
||||||
|
}
|
||||||
|
if result.InternalEgress != 0 {
|
||||||
|
result.InternalEgress = TD2UT(result.InternalEgress, false)
|
||||||
|
}
|
||||||
|
return result
|
||||||
|
}
|
||||||
|
|
||||||
|
func planetTransitMatchesDirection(eventJDE, targetJDE float64, direction int, includeCurrent bool) bool {
|
||||||
|
delta := eventJDE - targetJDE
|
||||||
|
if math.Abs(delta) <= planetTransitSearchEpsilonDays {
|
||||||
|
return includeCurrent
|
||||||
|
}
|
||||||
|
if direction > 0 {
|
||||||
|
return delta > 0
|
||||||
|
}
|
||||||
|
return delta < 0
|
||||||
|
}
|
||||||
|
|
||||||
|
func planetTransitAngleDelta(diff float64) float64 {
|
||||||
|
diff = Limit360(diff)
|
||||||
|
if diff > 180 {
|
||||||
|
diff -= 360
|
||||||
|
}
|
||||||
|
if diff < -180 {
|
||||||
|
diff += 360
|
||||||
|
}
|
||||||
|
return diff
|
||||||
|
}
|
||||||
|
|
||||||
|
func isFiniteFloat(value float64) bool {
|
||||||
|
return !math.IsNaN(value) && !math.IsInf(value, 0)
|
||||||
|
}
|
||||||
145
basic/planet_transit_test.go
Normal file
145
basic/planet_transit_test.go
Normal file
@ -0,0 +1,145 @@
|
|||||||
|
package basic
|
||||||
|
|
||||||
|
import (
|
||||||
|
"math"
|
||||||
|
"testing"
|
||||||
|
"time"
|
||||||
|
)
|
||||||
|
|
||||||
|
func TestKnownMercuryTransits(t *testing.T) {
|
||||||
|
tests := []struct {
|
||||||
|
name string
|
||||||
|
query time.Time
|
||||||
|
greatest time.Time
|
||||||
|
}{
|
||||||
|
{
|
||||||
|
name: "2016 May",
|
||||||
|
query: time.Date(2016, 1, 1, 0, 0, 0, 0, time.UTC),
|
||||||
|
greatest: time.Date(2016, 5, 9, 14, 57, 0, 0, time.UTC),
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "2019 Nov",
|
||||||
|
query: time.Date(2019, 1, 1, 0, 0, 0, 0, time.UTC),
|
||||||
|
greatest: time.Date(2019, 11, 11, 15, 20, 0, 0, time.UTC),
|
||||||
|
},
|
||||||
|
}
|
||||||
|
|
||||||
|
for _, tc := range tests {
|
||||||
|
t.Run(tc.name, func(t *testing.T) {
|
||||||
|
result := NextMercuryTransit(Date2JDE(tc.query))
|
||||||
|
if !result.Valid {
|
||||||
|
t.Fatal("expected valid transit")
|
||||||
|
}
|
||||||
|
got := JDE2DateByZone(result.Greatest, time.UTC, false)
|
||||||
|
t.Logf("start=%s greatest=%s end=%s min=%.3f sun=%.3f planet=%.3f",
|
||||||
|
JDE2DateByZone(result.ExternalIngress, time.UTC, false),
|
||||||
|
got,
|
||||||
|
JDE2DateByZone(result.ExternalEgress, time.UTC, false),
|
||||||
|
result.MinimumSeparationArcsec,
|
||||||
|
result.SunSemidiameterArcsec,
|
||||||
|
result.PlanetSemidiameterArcsec,
|
||||||
|
)
|
||||||
|
if math.Abs(got.Sub(tc.greatest).Seconds()) > 20*60 {
|
||||||
|
t.Fatalf("greatest mismatch: got %s want near %s", got, tc.greatest)
|
||||||
|
}
|
||||||
|
if !result.HasInternal {
|
||||||
|
t.Fatalf("expected internal contacts")
|
||||||
|
}
|
||||||
|
if !(result.ExternalIngress < result.InternalIngress &&
|
||||||
|
result.InternalIngress < result.Greatest &&
|
||||||
|
result.Greatest < result.InternalEgress &&
|
||||||
|
result.InternalEgress < result.ExternalEgress) {
|
||||||
|
t.Fatalf("contacts out of order: %+v", result)
|
||||||
|
}
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestKnownVenusTransits(t *testing.T) {
|
||||||
|
tests := []struct {
|
||||||
|
name string
|
||||||
|
query time.Time
|
||||||
|
greatest time.Time
|
||||||
|
}{
|
||||||
|
{
|
||||||
|
name: "2004 Jun",
|
||||||
|
query: time.Date(2004, 1, 1, 0, 0, 0, 0, time.UTC),
|
||||||
|
greatest: time.Date(2004, 6, 8, 8, 20, 0, 0, time.UTC),
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "2012 Jun",
|
||||||
|
query: time.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
|
||||||
|
greatest: time.Date(2012, 6, 6, 1, 29, 0, 0, time.UTC),
|
||||||
|
},
|
||||||
|
}
|
||||||
|
|
||||||
|
for _, tc := range tests {
|
||||||
|
t.Run(tc.name, func(t *testing.T) {
|
||||||
|
result := NextVenusTransit(Date2JDE(tc.query))
|
||||||
|
if !result.Valid {
|
||||||
|
t.Fatal("expected valid transit")
|
||||||
|
}
|
||||||
|
got := JDE2DateByZone(result.Greatest, time.UTC, false)
|
||||||
|
t.Logf("start=%s greatest=%s end=%s min=%.3f sun=%.3f planet=%.3f",
|
||||||
|
JDE2DateByZone(result.ExternalIngress, time.UTC, false),
|
||||||
|
got,
|
||||||
|
JDE2DateByZone(result.ExternalEgress, time.UTC, false),
|
||||||
|
result.MinimumSeparationArcsec,
|
||||||
|
result.SunSemidiameterArcsec,
|
||||||
|
result.PlanetSemidiameterArcsec,
|
||||||
|
)
|
||||||
|
if math.Abs(got.Sub(tc.greatest).Seconds()) > 20*60 {
|
||||||
|
t.Fatalf("greatest mismatch: got %s want near %s", got, tc.greatest)
|
||||||
|
}
|
||||||
|
if !result.HasInternal {
|
||||||
|
t.Fatalf("expected internal contacts")
|
||||||
|
}
|
||||||
|
if !(result.ExternalIngress < result.InternalIngress &&
|
||||||
|
result.InternalIngress < result.Greatest &&
|
||||||
|
result.Greatest < result.InternalEgress &&
|
||||||
|
result.InternalEgress < result.ExternalEgress) {
|
||||||
|
t.Fatalf("contacts out of order: %+v", result)
|
||||||
|
}
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestTransitSearchSkipsSparseEvents(t *testing.T) {
|
||||||
|
mercuryResult := NextMercuryTransit(Date2JDE(time.Date(2026, 1, 1, 0, 0, 0, 0, time.UTC)))
|
||||||
|
if !mercuryResult.Valid {
|
||||||
|
t.Fatal("expected Mercury transit")
|
||||||
|
}
|
||||||
|
mercuryGreatest := JDE2DateByZone(mercuryResult.Greatest, time.UTC, false)
|
||||||
|
if mercuryGreatest.Year() != 2032 || mercuryGreatest.Month() != time.November {
|
||||||
|
t.Fatalf("unexpected next Mercury transit: %s", mercuryGreatest)
|
||||||
|
}
|
||||||
|
|
||||||
|
venusResult := NextVenusTransit(Date2JDE(time.Date(2026, 1, 1, 0, 0, 0, 0, time.UTC)))
|
||||||
|
if !venusResult.Valid {
|
||||||
|
t.Fatal("expected Venus transit")
|
||||||
|
}
|
||||||
|
venusGreatest := JDE2DateByZone(venusResult.Greatest, time.UTC, false)
|
||||||
|
if venusGreatest.Year() != 2117 || venusGreatest.Month() != time.December {
|
||||||
|
t.Fatalf("unexpected next Venus transit: %s", venusGreatest)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func BenchmarkNextMercuryTransitFrom2026(b *testing.B) {
|
||||||
|
jd := Date2JDE(time.Date(2026, 1, 1, 0, 0, 0, 0, time.UTC))
|
||||||
|
for i := 0; i < b.N; i++ {
|
||||||
|
result := NextMercuryTransit(jd)
|
||||||
|
if !result.Valid {
|
||||||
|
b.Fatal("expected valid transit")
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func BenchmarkNextVenusTransitFrom2026(b *testing.B) {
|
||||||
|
jd := Date2JDE(time.Date(2026, 1, 1, 0, 0, 0, 0, time.UTC))
|
||||||
|
for i := 0; i < b.N; i++ {
|
||||||
|
result := NextVenusTransit(jd)
|
||||||
|
if !result.Valid {
|
||||||
|
b.Fatal("expected valid transit")
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
@ -279,7 +279,7 @@ func searchLunarEclipse(
|
|||||||
return lunarEclipseInfoFromBasic(result, date.Location()), true
|
return lunarEclipseInfoFromBasic(result, date.Location()), true
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
candidateTT = basic.CalcMoonSHByJDE(candidateTT+float64(direction)*lunarEclipseSynodicMonthDays, 1)
|
candidateTT = nextEclipseSearchCandidateTT(candidateTT, 1, direction, lunarEclipseSynodicMonthDays)
|
||||||
}
|
}
|
||||||
|
|
||||||
return LunarEclipseInfo{}, false
|
return LunarEclipseInfo{}, false
|
||||||
|
|||||||
@ -147,6 +147,12 @@ func LastLocalLunarEclipse(date time.Time, lon, lat, height float64) LocalLunarE
|
|||||||
return LastLocalLunarEclipseDanjon(date, lon, lat, height)
|
return LastLocalLunarEclipseDanjon(date, lon, lat, height)
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// LastLocalTotalLunarEclipse 上次可见月全食 / previous visible local total lunar eclipse.
|
||||||
|
// Previous visible local total lunar eclipse, using Danjon by default.
|
||||||
|
func LastLocalTotalLunarEclipse(date time.Time, lon, lat, height float64) (LocalLunarEclipseInfo, bool) {
|
||||||
|
return searchLocalTotalLunarEclipse(date, lon, lat, height, -1, true, basic.LunarEclipseDanjon, localLunarEclipseQueryVisible)
|
||||||
|
}
|
||||||
|
|
||||||
// LastLocalLunarEclipseDanjon 上次可见月食（Danjon） / previous visible local lunar eclipse with Danjon model.
|
// LastLocalLunarEclipseDanjon 上次可见月食（Danjon） / previous visible local lunar eclipse with Danjon model.
|
||||||
// Previous visible local lunar eclipse with the Danjon model.
|
// Previous visible local lunar eclipse with the Danjon model.
|
||||||
func LastLocalLunarEclipseDanjon(date time.Time, lon, lat, height float64) LocalLunarEclipseInfo {
|
func LastLocalLunarEclipseDanjon(date time.Time, lon, lat, height float64) LocalLunarEclipseInfo {
|
||||||
@ -187,6 +193,12 @@ func NextLocalLunarEclipse(date time.Time, lon, lat, height float64) LocalLunarE
|
|||||||
return NextLocalLunarEclipseDanjon(date, lon, lat, height)
|
return NextLocalLunarEclipseDanjon(date, lon, lat, height)
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// NextLocalTotalLunarEclipse 下次可见月全食 / next visible local total lunar eclipse.
|
||||||
|
// Next visible local total lunar eclipse, using Danjon by default.
|
||||||
|
func NextLocalTotalLunarEclipse(date time.Time, lon, lat, height float64) (LocalLunarEclipseInfo, bool) {
|
||||||
|
return searchLocalTotalLunarEclipse(date, lon, lat, height, 1, false, basic.LunarEclipseDanjon, localLunarEclipseQueryVisible)
|
||||||
|
}
|
||||||
|
|
||||||
// NextLocalLunarEclipseDanjon 下次可见月食（Danjon） / next visible local lunar eclipse with Danjon model.
|
// NextLocalLunarEclipseDanjon 下次可见月食（Danjon） / next visible local lunar eclipse with Danjon model.
|
||||||
// Next visible local lunar eclipse with the Danjon model.
|
// Next visible local lunar eclipse with the Danjon model.
|
||||||
func NextLocalLunarEclipseDanjon(date time.Time, lon, lat, height float64) LocalLunarEclipseInfo {
|
func NextLocalLunarEclipseDanjon(date time.Time, lon, lat, height float64) LocalLunarEclipseInfo {
|
||||||
@ -227,6 +239,14 @@ func ClosestLocalLunarEclipse(date time.Time, lon, lat, height float64) LocalLun
|
|||||||
return ClosestLocalLunarEclipseDanjon(date, lon, lat, height)
|
return ClosestLocalLunarEclipseDanjon(date, lon, lat, height)
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// ClosestLocalTotalLunarEclipse 最近一次可见月全食 / closest visible local total lunar eclipse.
|
||||||
|
// Closest visible local total lunar eclipse, using Danjon by default.
|
||||||
|
func ClosestLocalTotalLunarEclipse(date time.Time, lon, lat, height float64) (LocalLunarEclipseInfo, bool) {
|
||||||
|
last, hasLast := searchLocalTotalLunarEclipse(date, lon, lat, height, -1, true, basic.LunarEclipseDanjon, localLunarEclipseQueryVisible)
|
||||||
|
next, hasNext := searchLocalTotalLunarEclipse(date, lon, lat, height, 1, false, basic.LunarEclipseDanjon, localLunarEclipseQueryVisible)
|
||||||
|
return closestLocalLunarEclipseResult(date, last, hasLast, next, hasNext)
|
||||||
|
}
|
||||||
|
|
||||||
// ClosestLocalLunarEclipseDanjon 最近一次可见月食（Danjon） / closest visible local lunar eclipse with Danjon model.
|
// ClosestLocalLunarEclipseDanjon 最近一次可见月食（Danjon） / closest visible local lunar eclipse with Danjon model.
|
||||||
// Closest visible local lunar eclipse with the Danjon model.
|
// Closest visible local lunar eclipse with the Danjon model.
|
||||||
func ClosestLocalLunarEclipseDanjon(date time.Time, lon, lat, height float64) LocalLunarEclipseInfo {
|
func ClosestLocalLunarEclipseDanjon(date time.Time, lon, lat, height float64) LocalLunarEclipseInfo {
|
||||||
@ -272,21 +292,32 @@ func closestLocalLunarEclipse(
|
|||||||
next LocalLunarEclipseInfo,
|
next LocalLunarEclipseInfo,
|
||||||
hasNext bool,
|
hasNext bool,
|
||||||
) LocalLunarEclipseInfo {
|
) LocalLunarEclipseInfo {
|
||||||
|
info, _ := closestLocalLunarEclipseResult(date, last, hasLast, next, hasNext)
|
||||||
|
return info
|
||||||
|
}
|
||||||
|
|
||||||
|
func closestLocalLunarEclipseResult(
|
||||||
|
date time.Time,
|
||||||
|
last LocalLunarEclipseInfo,
|
||||||
|
hasLast bool,
|
||||||
|
next LocalLunarEclipseInfo,
|
||||||
|
hasNext bool,
|
||||||
|
) (LocalLunarEclipseInfo, bool) {
|
||||||
switch {
|
switch {
|
||||||
case hasLast && !hasNext:
|
case hasLast && !hasNext:
|
||||||
return last
|
return last, true
|
||||||
case !hasLast && hasNext:
|
case !hasLast && hasNext:
|
||||||
return next
|
return next, true
|
||||||
case !hasLast && !hasNext:
|
case !hasLast && !hasNext:
|
||||||
return LocalLunarEclipseInfo{}
|
return LocalLunarEclipseInfo{}, false
|
||||||
}
|
}
|
||||||
|
|
||||||
lastDistance := math.Abs(date.Sub(last.Maximum).Seconds())
|
lastDistance := math.Abs(date.Sub(last.Maximum).Seconds())
|
||||||
nextDistance := math.Abs(next.Maximum.Sub(date).Seconds())
|
nextDistance := math.Abs(next.Maximum.Sub(date).Seconds())
|
||||||
if lastDistance <= nextDistance {
|
if lastDistance <= nextDistance {
|
||||||
return last
|
return last, true
|
||||||
}
|
}
|
||||||
return next
|
return next, true
|
||||||
}
|
}
|
||||||
|
|
||||||
func searchLocalLunarEclipse(
|
func searchLocalLunarEclipse(
|
||||||
@ -311,7 +342,35 @@ func searchLocalLunarEclipse(
|
|||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
candidateTT = basic.CalcMoonSHByJDE(candidateTT+float64(direction)*lunarEclipseSynodicMonthDays, 1)
|
candidateTT = nextEclipseSearchCandidateTT(candidateTT, 1, direction, lunarEclipseSynodicMonthDays)
|
||||||
|
}
|
||||||
|
|
||||||
|
return LocalLunarEclipseInfo{}, false
|
||||||
|
}
|
||||||
|
|
||||||
|
func searchLocalTotalLunarEclipse(
|
||||||
|
date time.Time,
|
||||||
|
lon, lat, height float64,
|
||||||
|
direction int,
|
||||||
|
includeCurrent bool,
|
||||||
|
calculator lunarEclipseCalculator,
|
||||||
|
mode localLunarEclipseQueryMode,
|
||||||
|
) (LocalLunarEclipseInfo, bool) {
|
||||||
|
targetTT := timeToTTJDE(date)
|
||||||
|
candidateTT := basic.CalcMoonSHByJDE(targetTT, 1)
|
||||||
|
|
||||||
|
for i := 0; i < localLunarEclipseSearchLimit; i++ {
|
||||||
|
if isPotentialLunarEclipse(candidateTT) {
|
||||||
|
result := calculator(candidateTT)
|
||||||
|
if result.HasTotal {
|
||||||
|
info := localLunarEclipseInfoFromBasic(result, lon, lat, height, date.Location())
|
||||||
|
if (mode != localLunarEclipseQueryVisible || localTotalLunarEclipseVisible(info)) &&
|
||||||
|
lunarEclipseMatchesDirection(result.Maximum, targetTT, direction, includeCurrent) {
|
||||||
|
return info, true
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
candidateTT = nextEclipseSearchCandidateTT(candidateTT, 1, direction, lunarEclipseSynodicMonthDays)
|
||||||
}
|
}
|
||||||
|
|
||||||
return LocalLunarEclipseInfo{}, false
|
return LocalLunarEclipseInfo{}, false
|
||||||
@ -375,6 +434,13 @@ func localLunarEclipseVisible(info LocalLunarEclipseInfo) bool {
|
|||||||
return localLunarEclipseVisibleDuring(info, eventStart, eventEnd)
|
return localLunarEclipseVisibleDuring(info, eventStart, eventEnd)
|
||||||
}
|
}
|
||||||
|
|
||||||
|
func localTotalLunarEclipseVisible(info LocalLunarEclipseInfo) bool {
|
||||||
|
if !info.HasTotal || info.TotalStart.IsZero() || info.TotalEnd.IsZero() {
|
||||||
|
return false
|
||||||
|
}
|
||||||
|
return localLunarEclipseVisibleDuring(info, info.TotalStart, info.TotalEnd)
|
||||||
|
}
|
||||||
|
|
||||||
func localLunarEclipseVisibleOnDate(info LocalLunarEclipseInfo, dayStart, dayEnd time.Time) bool {
|
func localLunarEclipseVisibleOnDate(info LocalLunarEclipseInfo, dayStart, dayEnd time.Time) bool {
|
||||||
eventStart, eventEnd, ok := localLunarEclipseRange(info)
|
eventStart, eventEnd, ok := localLunarEclipseRange(info)
|
||||||
if !ok {
|
if !ok {
|
||||||
|
|||||||
@ -133,6 +133,61 @@ func TestLocalLunarEclipseSearchBeyondFiveYears(t *testing.T) {
|
|||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
func TestLocalTotalLunarEclipseSearch(t *testing.T) {
|
||||||
|
loc := time.FixedZone("CDT", -5*3600)
|
||||||
|
lon, lat, height := -87.65, 41.85, 0.0
|
||||||
|
date := time.Date(2025, 3, 13, 0, 0, 0, 0, loc)
|
||||||
|
|
||||||
|
next, ok := NextLocalTotalLunarEclipse(date, lon, lat, height)
|
||||||
|
if !ok {
|
||||||
|
t.Fatal("expected to find next local total lunar eclipse")
|
||||||
|
}
|
||||||
|
if next.Type != LunarEclipseTotal || !next.HasTotal {
|
||||||
|
t.Fatalf("unexpected next total lunar eclipse: %+v", next)
|
||||||
|
}
|
||||||
|
assertTimeClose(t, "NextLocalTotalLunarEclipse", next.Maximum, time.Date(2025, 3, 14, 1, 58, 47, 0, loc), 2*time.Minute)
|
||||||
|
|
||||||
|
last, ok := LastLocalTotalLunarEclipse(next.Maximum, lon, lat, height)
|
||||||
|
if !ok {
|
||||||
|
t.Fatal("expected to find previous local total lunar eclipse")
|
||||||
|
}
|
||||||
|
if last.Type != LunarEclipseTotal || !last.HasTotal {
|
||||||
|
t.Fatalf("unexpected last total lunar eclipse: %+v", last)
|
||||||
|
}
|
||||||
|
assertTimeClose(t, "LastLocalTotalLunarEclipse", last.Maximum, next.Maximum, time.Second)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLocalTotalLunarEclipseClosest(t *testing.T) {
|
||||||
|
loc := time.FixedZone("CDT", -5*3600)
|
||||||
|
lon, lat, height := -87.65, 41.85, 0.0
|
||||||
|
date := time.Date(2025, 3, 14, 0, 0, 0, 0, loc)
|
||||||
|
|
||||||
|
info, ok := ClosestLocalTotalLunarEclipse(date, lon, lat, height)
|
||||||
|
if !ok {
|
||||||
|
t.Fatal("expected to find closest local total lunar eclipse")
|
||||||
|
}
|
||||||
|
if info.Type != LunarEclipseTotal || !info.HasTotal {
|
||||||
|
t.Fatalf("unexpected closest total lunar eclipse: %+v", info)
|
||||||
|
}
|
||||||
|
assertTimeClose(t, "ClosestLocalTotalLunarEclipse", info.Maximum, time.Date(2025, 3, 14, 1, 58, 47, 0, loc), 2*time.Minute)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLocalTotalLunarEclipseVisibleRequiresTotalPhaseVisibility(t *testing.T) {
|
||||||
|
info, ok := LocalLunarEclipseOnDate(time.Date(2025, 3, 14, 12, 0, 0, 0, time.UTC), -0.1278, 51.5074, 0)
|
||||||
|
if !ok {
|
||||||
|
t.Fatalf("expected visible local eclipse in London")
|
||||||
|
}
|
||||||
|
if info.Type != LunarEclipseTotal || !info.HasTotal {
|
||||||
|
t.Fatalf("unexpected eclipse type: %+v", info)
|
||||||
|
}
|
||||||
|
if !localLunarEclipseVisible(info) {
|
||||||
|
t.Fatalf("expected some phase to be visible")
|
||||||
|
}
|
||||||
|
if localTotalLunarEclipseVisible(info) {
|
||||||
|
t.Fatalf("expected total phase below horizon to be rejected")
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
func TestLocalLunarEclipseInfoKeepsLocation(t *testing.T) {
|
func TestLocalLunarEclipseInfoKeepsLocation(t *testing.T) {
|
||||||
loc := time.FixedZone("JST", 9*3600)
|
loc := time.FixedZone("JST", 9*3600)
|
||||||
lon, lat, height := 139.6917, 35.6895, 1234.0
|
lon, lat, height := 139.6917, 35.6895, 1234.0
|
||||||
|
|||||||
130
eclipse/saros.go
130
eclipse/saros.go
@ -1,6 +1,7 @@
|
|||||||
package eclipse
|
package eclipse
|
||||||
|
|
||||||
import (
|
import (
|
||||||
|
"math"
|
||||||
"time"
|
"time"
|
||||||
|
|
||||||
"b612.me/astro/basic"
|
"b612.me/astro/basic"
|
||||||
@ -10,6 +11,18 @@ const (
|
|||||||
sarosCycleLunations = 223
|
sarosCycleLunations = 223
|
||||||
sarosCycleDays = float64(sarosCycleLunations) * solarEclipseSynodicMonthDays
|
sarosCycleDays = float64(sarosCycleLunations) * solarEclipseSynodicMonthDays
|
||||||
sarosWalkLimit = 100
|
sarosWalkLimit = 100
|
||||||
|
|
||||||
|
sarosMagicYearOffset = 3000
|
||||||
|
sarosMagicCountMask = 0x7f
|
||||||
|
sarosMagicDayMask = 0x1f
|
||||||
|
sarosMagicMonthMask = 0x0f
|
||||||
|
sarosMagicYearMask = 0x1fff
|
||||||
|
sarosMagicCountShift = 0
|
||||||
|
sarosMagicDayShift = 7
|
||||||
|
sarosMagicMonthShift = 12
|
||||||
|
sarosMagicYearShift = 16
|
||||||
|
sarosMagicMatchLimitDay = 12.0
|
||||||
|
sarosMagicTieEpsilonDay = 1e-9
|
||||||
)
|
)
|
||||||
|
|
||||||
// SarosInfo 沙罗序列信息, Saros series metadata.
|
// SarosInfo 沙罗序列信息, Saros series metadata.
|
||||||
@ -25,6 +38,8 @@ type SarosInfo struct {
|
|||||||
Count int
|
Count int
|
||||||
}
|
}
|
||||||
|
|
||||||
|
type sarosMagic uint32
|
||||||
|
|
||||||
type sarosAnchor struct {
|
type sarosAnchor struct {
|
||||||
Series int16
|
Series int16
|
||||||
Count uint8
|
Count uint8
|
||||||
@ -53,6 +68,20 @@ var lunarSarosHeadOverrides = [...]sarosHeadOverride{
|
|||||||
}
|
}
|
||||||
|
|
||||||
func solarSarosInfo(ttJDE float64) (SarosInfo, bool) {
|
func solarSarosInfo(ttJDE float64) (SarosInfo, bool) {
|
||||||
|
if info, ok := matchSarosMagic(solarSarosAnchors[:], 0, solarSarosHeadOverrides[:], ttJDE); ok {
|
||||||
|
return info, true
|
||||||
|
}
|
||||||
|
return solarSarosInfoByWalk(ttJDE)
|
||||||
|
}
|
||||||
|
|
||||||
|
func lunarSarosInfo(ttJDE float64) (SarosInfo, bool) {
|
||||||
|
if info, ok := matchSarosMagic(lunarSarosAnchors[:], 1, lunarSarosHeadOverrides[:], ttJDE); ok {
|
||||||
|
return info, true
|
||||||
|
}
|
||||||
|
return lunarSarosInfoByWalk(ttJDE)
|
||||||
|
}
|
||||||
|
|
||||||
|
func solarSarosInfoByWalk(ttJDE float64) (SarosInfo, bool) {
|
||||||
headTT, member, ok := solarSarosHead(ttJDE)
|
headTT, member, ok := solarSarosHead(ttJDE)
|
||||||
if !ok {
|
if !ok {
|
||||||
return SarosInfo{}, false
|
return SarosInfo{}, false
|
||||||
@ -60,7 +89,7 @@ func solarSarosInfo(ttJDE float64) (SarosInfo, bool) {
|
|||||||
if info, ok := matchSarosHeadOverride(solarSarosHeadOverrides[:], headTT, member); ok {
|
if info, ok := matchSarosHeadOverride(solarSarosHeadOverrides[:], headTT, member); ok {
|
||||||
return info, true
|
return info, true
|
||||||
}
|
}
|
||||||
anchor, ok := matchSarosAnchor(solarSarosAnchors[:], headTT)
|
anchor, ok := matchSarosAnchor(solarSarosAnchors[:], 0, headTT)
|
||||||
if !ok || member > int(anchor.Count) {
|
if !ok || member > int(anchor.Count) {
|
||||||
return SarosInfo{}, false
|
return SarosInfo{}, false
|
||||||
}
|
}
|
||||||
@ -71,7 +100,7 @@ func solarSarosInfo(ttJDE float64) (SarosInfo, bool) {
|
|||||||
}, true
|
}, true
|
||||||
}
|
}
|
||||||
|
|
||||||
func lunarSarosInfo(ttJDE float64) (SarosInfo, bool) {
|
func lunarSarosInfoByWalk(ttJDE float64) (SarosInfo, bool) {
|
||||||
headTT, member, ok := lunarSarosHead(ttJDE)
|
headTT, member, ok := lunarSarosHead(ttJDE)
|
||||||
if !ok {
|
if !ok {
|
||||||
return SarosInfo{}, false
|
return SarosInfo{}, false
|
||||||
@ -79,7 +108,7 @@ func lunarSarosInfo(ttJDE float64) (SarosInfo, bool) {
|
|||||||
if info, ok := matchSarosHeadOverride(lunarSarosHeadOverrides[:], headTT, member); ok {
|
if info, ok := matchSarosHeadOverride(lunarSarosHeadOverrides[:], headTT, member); ok {
|
||||||
return info, true
|
return info, true
|
||||||
}
|
}
|
||||||
anchor, ok := matchSarosAnchor(lunarSarosAnchors[:], headTT)
|
anchor, ok := matchSarosAnchor(lunarSarosAnchors[:], 1, headTT)
|
||||||
if !ok || member > int(anchor.Count) {
|
if !ok || member > int(anchor.Count) {
|
||||||
return SarosInfo{}, false
|
return SarosInfo{}, false
|
||||||
}
|
}
|
||||||
@ -120,11 +149,102 @@ func lunarSarosHead(ttJDE float64) (float64, int, bool) {
|
|||||||
return 0, 0, false
|
return 0, 0, false
|
||||||
}
|
}
|
||||||
|
|
||||||
func matchSarosAnchor(anchors []sarosAnchor, headTT float64) (sarosAnchor, bool) {
|
func matchSarosMagic(anchors []sarosMagic, seriesBase int, overrides []sarosHeadOverride, ttJDE float64) (SarosInfo, bool) {
|
||||||
|
if info, ok := matchSarosMagicOverrides(overrides, ttJDE); ok {
|
||||||
|
return info, true
|
||||||
|
}
|
||||||
|
bestDistance := math.Inf(1)
|
||||||
|
best := SarosInfo{}
|
||||||
|
for index, magic := range anchors {
|
||||||
|
anchor := decodeSarosMagic(magic, seriesBase+index)
|
||||||
|
info, distance, ok := matchSarosMagicCandidate(ttJDE, anchor, 0)
|
||||||
|
if !ok {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
if betterSarosMagicMatch(info, distance, best, bestDistance) {
|
||||||
|
bestDistance = distance
|
||||||
|
best = info
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if bestDistance <= sarosMagicMatchLimitDay {
|
||||||
|
return best, true
|
||||||
|
}
|
||||||
|
return SarosInfo{}, false
|
||||||
|
}
|
||||||
|
|
||||||
|
func matchSarosMagicOverrides(overrides []sarosHeadOverride, ttJDE float64) (SarosInfo, bool) {
|
||||||
|
bestDistance := math.Inf(1)
|
||||||
|
best := SarosInfo{}
|
||||||
|
for _, override := range overrides {
|
||||||
|
anchor := sarosAnchor{
|
||||||
|
Series: override.Series,
|
||||||
|
Count: override.Count,
|
||||||
|
Year: override.HeadYear,
|
||||||
|
Month: override.HeadMonth,
|
||||||
|
Day: override.HeadDay,
|
||||||
|
}
|
||||||
|
info, distance, ok := matchSarosMagicCandidate(ttJDE, anchor, int(override.MemberOffset))
|
||||||
|
if !ok {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
if betterSarosMagicMatch(info, distance, best, bestDistance) {
|
||||||
|
bestDistance = distance
|
||||||
|
best = info
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if bestDistance <= sarosMagicMatchLimitDay {
|
||||||
|
return best, true
|
||||||
|
}
|
||||||
|
return SarosInfo{}, false
|
||||||
|
}
|
||||||
|
|
||||||
|
func matchSarosMagicCandidate(ttJDE float64, anchor sarosAnchor, memberOffset int) (SarosInfo, float64, bool) {
|
||||||
|
headTT := basic.JDECalc(int(anchor.Year), int(anchor.Month), float64(anchor.Day))
|
||||||
|
if math.IsNaN(headTT) {
|
||||||
|
return SarosInfo{}, 0, false
|
||||||
|
}
|
||||||
|
member := int(math.Round((ttJDE-headTT)/sarosCycleDays)) + 1 + memberOffset
|
||||||
|
if member < 1 || member > int(anchor.Count) {
|
||||||
|
return SarosInfo{}, 0, false
|
||||||
|
}
|
||||||
|
expectedTT := headTT + float64(member-1-memberOffset)*sarosCycleDays
|
||||||
|
return SarosInfo{
|
||||||
|
Series: int(anchor.Series),
|
||||||
|
Member: member,
|
||||||
|
Count: int(anchor.Count),
|
||||||
|
}, math.Abs(ttJDE - expectedTT), true
|
||||||
|
}
|
||||||
|
|
||||||
|
func betterSarosMagicMatch(info SarosInfo, distance float64, best SarosInfo, bestDistance float64) bool {
|
||||||
|
if distance < bestDistance-sarosMagicTieEpsilonDay {
|
||||||
|
return true
|
||||||
|
}
|
||||||
|
if math.Abs(distance-bestDistance) > sarosMagicTieEpsilonDay {
|
||||||
|
return false
|
||||||
|
}
|
||||||
|
if info.Series != best.Series {
|
||||||
|
return info.Series < best.Series
|
||||||
|
}
|
||||||
|
return info.Member < best.Member
|
||||||
|
}
|
||||||
|
|
||||||
|
func decodeSarosMagic(magic sarosMagic, series int) sarosAnchor {
|
||||||
|
value := uint32(magic)
|
||||||
|
return sarosAnchor{
|
||||||
|
Series: int16(series),
|
||||||
|
Count: uint8((value >> sarosMagicCountShift) & sarosMagicCountMask),
|
||||||
|
Year: int16(int((value>>sarosMagicYearShift)&sarosMagicYearMask) - sarosMagicYearOffset),
|
||||||
|
Month: uint8((value >> sarosMagicMonthShift) & sarosMagicMonthMask),
|
||||||
|
Day: uint8((value >> sarosMagicDayShift) & sarosMagicDayMask),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func matchSarosAnchor(anchors []sarosMagic, seriesBase int, headTT float64) (sarosAnchor, bool) {
|
||||||
headDate := basic.JDE2DateByZone(headTT, time.UTC, true)
|
headDate := basic.JDE2DateByZone(headTT, time.UTC, true)
|
||||||
year, month, day := headDate.Date()
|
year, month, day := headDate.Date()
|
||||||
monthNumber := int(month)
|
monthNumber := int(month)
|
||||||
for _, anchor := range anchors {
|
for index, magic := range anchors {
|
||||||
|
anchor := decodeSarosMagic(magic, seriesBase+index)
|
||||||
if int(anchor.Year) == year && int(anchor.Month) == monthNumber && int(anchor.Day) == day {
|
if int(anchor.Year) == year && int(anchor.Month) == monthNumber && int(anchor.Day) == day {
|
||||||
return anchor, true
|
return anchor, true
|
||||||
}
|
}
|
||||||
|
|||||||
@ -2,185 +2,185 @@ package eclipse
|
|||||||
|
|
||||||
// Code generated by /tmp/generate_saros_tables.go; DO NOT EDIT.
|
// Code generated by /tmp/generate_saros_tables.go; DO NOT EDIT.
|
||||||
|
|
||||||
var lunarSarosAnchors = [...]sarosAnchor{
|
var lunarSarosAnchors = [...]sarosMagic{
|
||||||
{Series: 1, Count: 73, Year: -2570, Month: 3, Day: 14},
|
0x21ae3749,
|
||||||
{Series: 2, Count: 73, Year: -2523, Month: 3, Day: 3},
|
0x21dd31c9,
|
||||||
{Series: 3, Count: 76, Year: -2567, Month: 12, Day: 30},
|
0x21b1cf4c,
|
||||||
{Series: 4, Count: 78, Year: -2646, Month: 10, Day: 6},
|
0x2162a34e,
|
||||||
{Series: 5, Count: 77, Year: -2455, Month: 12, Day: 22},
|
0x2221cb4d,
|
||||||
{Series: 6, Count: 86, Year: -2624, Month: 8, Day: 4},
|
0x21788256,
|
||||||
{Series: 7, Count: 89, Year: -2595, Month: 7, Day: 16},
|
0x21957859,
|
||||||
{Series: 8, Count: 86, Year: -2494, Month: 8, Day: 8},
|
0x21fa8456,
|
||||||
{Series: 9, Count: 75, Year: -2501, Month: 6, Day: 26},
|
0x21f36d4b,
|
||||||
{Series: 10, Count: 74, Year: -2454, Month: 6, Day: 17},
|
0x222268ca,
|
||||||
{Series: 11, Count: 74, Year: -2371, Month: 6, Day: 29},
|
0x22756eca,
|
||||||
{Series: 12, Count: 73, Year: -2360, Month: 5, Day: 28},
|
0x22805e49,
|
||||||
{Series: 13, Count: 73, Year: -2313, Month: 5, Day: 20},
|
0x22af5a49,
|
||||||
{Series: 14, Count: 73, Year: -2230, Month: 6, Day: 1},
|
0x230260c9,
|
||||||
{Series: 15, Count: 73, Year: -2219, Month: 4, Day: 30},
|
0x230d4f49,
|
||||||
{Series: 16, Count: 73, Year: -2172, Month: 4, Day: 21},
|
0x233c4ac9,
|
||||||
{Series: 17, Count: 72, Year: -2089, Month: 5, Day: 4},
|
0x238f5248,
|
||||||
{Series: 18, Count: 73, Year: -2078, Month: 4, Day: 2},
|
0x239a4149,
|
||||||
{Series: 19, Count: 73, Year: -2031, Month: 3, Day: 24},
|
0x23c93c49,
|
||||||
{Series: 20, Count: 72, Year: -1948, Month: 4, Day: 5},
|
0x241c42c8,
|
||||||
{Series: 21, Count: 74, Year: -1955, Month: 2, Day: 22},
|
0x24152b4a,
|
||||||
{Series: 22, Count: 74, Year: -1926, Month: 2, Day: 2},
|
0x2432214a,
|
||||||
{Series: 23, Count: 73, Year: -1825, Month: 2, Day: 25},
|
0x24972cc9,
|
||||||
{Series: 24, Count: 85, Year: -2031, Month: 9, Day: 16},
|
0x23c99855,
|
||||||
{Series: 25, Count: 87, Year: -2038, Month: 8, Day: 6},
|
0x23c28357,
|
||||||
{Series: 26, Count: 85, Year: -1919, Month: 9, Day: 9},
|
0x243994d5,
|
||||||
{Series: 27, Count: 85, Year: -1926, Month: 7, Day: 28},
|
0x24327e55,
|
||||||
{Series: 28, Count: 74, Year: -1897, Month: 7, Day: 9},
|
0x244f74ca,
|
||||||
{Series: 29, Count: 83, Year: -1814, Month: 7, Day: 21},
|
0x24a27ad3,
|
||||||
{Series: 30, Count: 74, Year: -1803, Month: 6, Day: 19},
|
0x24ad69ca,
|
||||||
{Series: 31, Count: 73, Year: -1774, Month: 5, Day: 30},
|
0x24ca5f49,
|
||||||
{Series: 32, Count: 73, Year: -1673, Month: 6, Day: 23},
|
0x252f6bc9,
|
||||||
{Series: 33, Count: 73, Year: -1662, Month: 5, Day: 22},
|
0x253a5b49,
|
||||||
{Series: 34, Count: 72, Year: -1615, Month: 5, Day: 13},
|
0x256956c8,
|
||||||
{Series: 35, Count: 72, Year: -1532, Month: 5, Day: 25},
|
0x25bc5cc8,
|
||||||
{Series: 36, Count: 73, Year: -1521, Month: 4, Day: 24},
|
0x25c74c49,
|
||||||
{Series: 37, Count: 72, Year: -1492, Month: 4, Day: 3},
|
0x25e441c8,
|
||||||
{Series: 38, Count: 72, Year: -1391, Month: 4, Day: 27},
|
0x26494dc8,
|
||||||
{Series: 39, Count: 73, Year: -1380, Month: 3, Day: 26},
|
0x26543d49,
|
||||||
{Series: 40, Count: 73, Year: -1369, Month: 2, Day: 24},
|
0x265f2c49,
|
||||||
{Series: 41, Count: 73, Year: -1268, Month: 3, Day: 18},
|
0x26c43949,
|
||||||
{Series: 42, Count: 74, Year: -1275, Month: 2, Day: 4},
|
0x26bd224a,
|
||||||
{Series: 43, Count: 85, Year: -1463, Month: 9, Day: 7},
|
0x260193d5,
|
||||||
{Series: 44, Count: 76, Year: -1199, Month: 1, Day: 6},
|
0x2709134c,
|
||||||
{Series: 45, Count: 85, Year: -1351, Month: 8, Day: 29},
|
0x26718ed5,
|
||||||
{Series: 46, Count: 76, Year: -1358, Month: 7, Day: 19},
|
0x266a79cc,
|
||||||
{Series: 47, Count: 86, Year: -1275, Month: 7, Day: 31},
|
0x26bd7fd6,
|
||||||
{Series: 48, Count: 75, Year: -1228, Month: 7, Day: 21},
|
0x26ec7acb,
|
||||||
{Series: 49, Count: 73, Year: -1217, Month: 6, Day: 21},
|
0x26f76ac9,
|
||||||
{Series: 50, Count: 73, Year: -1134, Month: 7, Day: 3},
|
0x274a71c9,
|
||||||
{Series: 51, Count: 73, Year: -1105, Month: 6, Day: 13},
|
0x276766c9,
|
||||||
{Series: 52, Count: 72, Year: -1076, Month: 5, Day: 23},
|
0x27845bc8,
|
||||||
{Series: 53, Count: 72, Year: -993, Month: 6, Day: 5},
|
0x27d762c8,
|
||||||
{Series: 54, Count: 72, Year: -946, Month: 5, Day: 26},
|
0x28065d48,
|
||||||
{Series: 55, Count: 72, Year: -935, Month: 4, Day: 25},
|
0x28114cc8,
|
||||||
{Series: 56, Count: 72, Year: -852, Month: 5, Day: 7},
|
0x286453c8,
|
||||||
{Series: 57, Count: 73, Year: -823, Month: 4, Day: 16},
|
0x28814849,
|
||||||
{Series: 58, Count: 73, Year: -812, Month: 3, Day: 16},
|
0x288c3849,
|
||||||
{Series: 59, Count: 71, Year: -711, Month: 4, Day: 9},
|
0x28f144c7,
|
||||||
{Series: 60, Count: 73, Year: -700, Month: 3, Day: 8},
|
0x28fc3449,
|
||||||
{Series: 61, Count: 78, Year: -780, Month: 12, Day: 13},
|
0x28acc6ce,
|
||||||
{Series: 62, Count: 74, Year: -624, Month: 2, Day: 8},
|
0x2948244a,
|
||||||
{Series: 63, Count: 82, Year: -722, Month: 11, Day: 3},
|
0x28e6b1d2,
|
||||||
{Series: 64, Count: 84, Year: -783, Month: 8, Day: 20},
|
0x28a98a54,
|
||||||
{Series: 65, Count: 86, Year: -736, Month: 8, Day: 11},
|
0x28d885d6,
|
||||||
{Series: 66, Count: 84, Year: -671, Month: 8, Day: 12},
|
0x29198654,
|
||||||
{Series: 67, Count: 73, Year: -660, Month: 7, Day: 11},
|
0x292475c9,
|
||||||
{Series: 68, Count: 72, Year: -595, Month: 7, Day: 14},
|
0x29657748,
|
||||||
{Series: 69, Count: 73, Year: -530, Month: 7, Day: 15},
|
0x29a677c9,
|
||||||
{Series: 70, Count: 72, Year: -519, Month: 6, Day: 13},
|
0x29b166c8,
|
||||||
{Series: 71, Count: 72, Year: -472, Month: 6, Day: 4},
|
0x29e06248,
|
||||||
{Series: 72, Count: 72, Year: -389, Month: 6, Day: 17},
|
0x2a3368c8,
|
||||||
{Series: 73, Count: 72, Year: -378, Month: 5, Day: 16},
|
0x2a3e5848,
|
||||||
{Series: 74, Count: 72, Year: -331, Month: 5, Day: 7},
|
0x2a6d53c8,
|
||||||
{Series: 75, Count: 72, Year: -266, Month: 5, Day: 8},
|
0x2aae5448,
|
||||||
{Series: 76, Count: 73, Year: -255, Month: 4, Day: 7},
|
0x2ab943c9,
|
||||||
{Series: 77, Count: 72, Year: -190, Month: 4, Day: 9},
|
0x2afa44c8,
|
||||||
{Series: 78, Count: 72, Year: -125, Month: 4, Day: 10},
|
0x2b3b4548,
|
||||||
{Series: 79, Count: 73, Year: -132, Month: 2, Day: 27},
|
0x2b342dc9,
|
||||||
{Series: 80, Count: 74, Year: -103, Month: 2, Day: 7},
|
0x2b5123ca,
|
||||||
{Series: 81, Count: 74, Year: -20, Month: 2, Day: 19},
|
0x2ba429ca,
|
||||||
{Series: 82, Count: 84, Year: -208, Month: 9, Day: 21},
|
0x2ae89ad4,
|
||||||
{Series: 83, Count: 84, Year: -197, Month: 8, Day: 22},
|
0x2af38b54,
|
||||||
{Series: 84, Count: 84, Year: -96, Month: 9, Day: 13},
|
0x2b5896d4,
|
||||||
{Series: 85, Count: 76, Year: -103, Month: 8, Day: 2},
|
0x2b51814c,
|
||||||
{Series: 86, Count: 73, Year: -74, Month: 7, Day: 13},
|
0x2b6e76c9,
|
||||||
{Series: 87, Count: 73, Year: 27, Month: 8, Day: 6},
|
0x2bd38349,
|
||||||
{Series: 88, Count: 72, Year: 38, Month: 7, Day: 5},
|
0x2bde72c8,
|
||||||
{Series: 89, Count: 72, Year: 67, Month: 6, Day: 15},
|
0x2bfb67c8,
|
||||||
{Series: 90, Count: 72, Year: 150, Month: 6, Day: 27},
|
0x2c4e6dc8,
|
||||||
{Series: 91, Count: 72, Year: 179, Month: 6, Day: 7},
|
0x2c6b63c8,
|
||||||
{Series: 92, Count: 71, Year: 208, Month: 5, Day: 17},
|
0x2c8858c7,
|
||||||
{Series: 93, Count: 71, Year: 291, Month: 5, Day: 30},
|
0x2cdb5f47,
|
||||||
{Series: 94, Count: 71, Year: 320, Month: 5, Day: 9},
|
0x2cf854c7,
|
||||||
{Series: 95, Count: 71, Year: 349, Month: 4, Day: 19},
|
0x2d1549c7,
|
||||||
{Series: 96, Count: 71, Year: 432, Month: 5, Day: 1},
|
0x2d6850c7,
|
||||||
{Series: 97, Count: 72, Year: 443, Month: 3, Day: 31},
|
0x2d733fc8,
|
||||||
{Series: 98, Count: 74, Year: 436, Month: 2, Day: 18},
|
0x2d6c294a,
|
||||||
{Series: 99, Count: 72, Year: 555, Month: 3, Day: 24},
|
0x2de33c48,
|
||||||
{Series: 100, Count: 79, Year: 439, Month: 12, Day: 6},
|
0x2d6fc34f,
|
||||||
{Series: 101, Count: 83, Year: 360, Month: 9, Day: 11},
|
0x2d2095d3,
|
||||||
{Series: 102, Count: 84, Year: 461, Month: 10, Day: 5},
|
0x2d85a2d4,
|
||||||
{Series: 103, Count: 82, Year: 472, Month: 9, Day: 3},
|
0x2d9091d2,
|
||||||
{Series: 104, Count: 72, Year: 483, Month: 8, Day: 4},
|
0x2d9b8248,
|
||||||
{Series: 105, Count: 73, Year: 566, Month: 8, Day: 16},
|
0x2dee8849,
|
||||||
{Series: 106, Count: 73, Year: 595, Month: 7, Day: 27},
|
0x2e0b7dc9,
|
||||||
{Series: 107, Count: 72, Year: 606, Month: 6, Day: 26},
|
0x2e166d48,
|
||||||
{Series: 108, Count: 72, Year: 689, Month: 7, Day: 8},
|
0x2e697448,
|
||||||
{Series: 109, Count: 71, Year: 736, Month: 6, Day: 27},
|
0x2e986dc7,
|
||||||
{Series: 110, Count: 72, Year: 747, Month: 5, Day: 28},
|
0x2ea35e48,
|
||||||
{Series: 111, Count: 71, Year: 830, Month: 6, Day: 10},
|
0x2ef66547,
|
||||||
{Series: 112, Count: 72, Year: 859, Month: 5, Day: 20},
|
0x2f135a48,
|
||||||
{Series: 113, Count: 71, Year: 888, Month: 4, Day: 29},
|
0x2f304ec7,
|
||||||
{Series: 114, Count: 71, Year: 971, Month: 5, Day: 13},
|
0x2f8356c7,
|
||||||
{Series: 115, Count: 72, Year: 1000, Month: 4, Day: 21},
|
0x2fa04ac8,
|
||||||
{Series: 116, Count: 73, Year: 993, Month: 3, Day: 11},
|
0x2f9935c9,
|
||||||
{Series: 117, Count: 71, Year: 1094, Month: 4, Day: 3},
|
0x2ffe41c7,
|
||||||
{Series: 118, Count: 73, Year: 1105, Month: 3, Day: 2},
|
0x30093149,
|
||||||
{Series: 119, Count: 82, Year: 935, Month: 10, Day: 14},
|
0x2f5fa752,
|
||||||
{Series: 120, Count: 83, Year: 1000, Month: 10, Day: 16},
|
0x2fa0a853,
|
||||||
{Series: 121, Count: 82, Year: 1047, Month: 10, Day: 6},
|
0x2fcfa352,
|
||||||
{Series: 122, Count: 74, Year: 1022, Month: 8, Day: 14},
|
0x2fb6874a,
|
||||||
{Series: 123, Count: 72, Year: 1087, Month: 8, Day: 16},
|
0x2ff78848,
|
||||||
{Series: 124, Count: 73, Year: 1152, Month: 8, Day: 17},
|
0x303888c9,
|
||||||
{Series: 125, Count: 72, Year: 1163, Month: 7, Day: 17},
|
0x304378c8,
|
||||||
{Series: 126, Count: 70, Year: 1228, Month: 7, Day: 18},
|
0x30847946,
|
||||||
{Series: 127, Count: 72, Year: 1275, Month: 7, Day: 9},
|
0x30b374c8,
|
||||||
{Series: 128, Count: 71, Year: 1304, Month: 6, Day: 18},
|
0x30d06947,
|
||||||
{Series: 129, Count: 71, Year: 1351, Month: 6, Day: 10},
|
0x30ff6547,
|
||||||
{Series: 130, Count: 71, Year: 1416, Month: 6, Day: 10},
|
0x31406547,
|
||||||
{Series: 131, Count: 72, Year: 1427, Month: 5, Day: 10},
|
0x314b5548,
|
||||||
{Series: 132, Count: 71, Year: 1492, Month: 5, Day: 12},
|
0x318c5647,
|
||||||
{Series: 133, Count: 71, Year: 1557, Month: 5, Day: 13},
|
0x31cd56c7,
|
||||||
{Series: 134, Count: 72, Year: 1550, Month: 4, Day: 1},
|
0x31c640c8,
|
||||||
{Series: 135, Count: 71, Year: 1615, Month: 4, Day: 13},
|
0x320746c7,
|
||||||
{Series: 136, Count: 72, Year: 1680, Month: 4, Day: 13},
|
0x324846c8,
|
||||||
{Series: 137, Count: 78, Year: 1564, Month: 12, Day: 17},
|
0x31d4c8ce,
|
||||||
{Series: 138, Count: 82, Year: 1521, Month: 10, Day: 15},
|
0x31a9a7d2,
|
||||||
{Series: 139, Count: 79, Year: 1658, Month: 12, Day: 9},
|
0x3232c4cf,
|
||||||
{Series: 140, Count: 77, Year: 1597, Month: 9, Day: 25},
|
0x31f59ccd,
|
||||||
{Series: 141, Count: 72, Year: 1608, Month: 8, Day: 25},
|
0x32008cc8,
|
||||||
{Series: 142, Count: 73, Year: 1709, Month: 9, Day: 19},
|
0x326599c9,
|
||||||
{Series: 143, Count: 72, Year: 1720, Month: 8, Day: 18},
|
0x32708948,
|
||||||
{Series: 144, Count: 71, Year: 1749, Month: 7, Day: 29},
|
0x328d7ec7,
|
||||||
{Series: 145, Count: 71, Year: 1832, Month: 8, Day: 11},
|
0x32e085c7,
|
||||||
{Series: 146, Count: 72, Year: 1843, Month: 7, Day: 11},
|
0x32eb75c8,
|
||||||
{Series: 147, Count: 70, Year: 1890, Month: 7, Day: 2},
|
0x331a7146,
|
||||||
{Series: 148, Count: 70, Year: 1973, Month: 7, Day: 15},
|
0x336d77c6,
|
||||||
{Series: 149, Count: 71, Year: 1984, Month: 6, Day: 13},
|
0x337866c7,
|
||||||
{Series: 150, Count: 71, Year: 2013, Month: 5, Day: 25},
|
0x33955cc7,
|
||||||
{Series: 151, Count: 71, Year: 2096, Month: 6, Day: 6},
|
0x33e86347,
|
||||||
{Series: 152, Count: 72, Year: 2107, Month: 5, Day: 7},
|
0x33f353c8,
|
||||||
{Series: 153, Count: 71, Year: 2136, Month: 4, Day: 16},
|
0x34104847,
|
||||||
{Series: 154, Count: 71, Year: 2237, Month: 5, Day: 10},
|
0x34755547,
|
||||||
{Series: 155, Count: 73, Year: 2212, Month: 3, Day: 18},
|
0x345c3949,
|
||||||
{Series: 156, Count: 81, Year: 2060, Month: 11, Day: 8},
|
0x33c4b451,
|
||||||
{Series: 157, Count: 73, Year: 2306, Month: 3, Day: 1},
|
0x34ba30c9,
|
||||||
{Series: 158, Count: 81, Year: 2154, Month: 10, Day: 21},
|
0x3422aad1,
|
||||||
{Series: 159, Count: 73, Year: 2147, Month: 9, Day: 9},
|
0x341b94c9,
|
||||||
{Series: 160, Count: 72, Year: 2248, Month: 10, Day: 3},
|
0x3480a1c8,
|
||||||
{Series: 161, Count: 73, Year: 2259, Month: 9, Day: 2},
|
0x348b9149,
|
||||||
{Series: 162, Count: 71, Year: 2288, Month: 8, Day: 12},
|
0x34a88647,
|
||||||
{Series: 163, Count: 70, Year: 2371, Month: 8, Day: 27},
|
0x34fb8dc6,
|
||||||
{Series: 164, Count: 71, Year: 2400, Month: 8, Day: 5},
|
0x351882c7,
|
||||||
{Series: 165, Count: 71, Year: 2411, Month: 7, Day: 6},
|
0x35237347,
|
||||||
{Series: 166, Count: 70, Year: 2494, Month: 7, Day: 18},
|
0x35767946,
|
||||||
{Series: 167, Count: 71, Year: 2541, Month: 7, Day: 9},
|
0x35a574c7,
|
||||||
{Series: 168, Count: 71, Year: 2552, Month: 6, Day: 8},
|
0x35b06447,
|
||||||
{Series: 169, Count: 70, Year: 2635, Month: 6, Day: 22},
|
0x36036b46,
|
||||||
{Series: 170, Count: 71, Year: 2664, Month: 6, Day: 1},
|
0x362060c7,
|
||||||
{Series: 171, Count: 71, Year: 2675, Month: 5, Day: 1},
|
0x362b50c7,
|
||||||
{Series: 172, Count: 70, Year: 2758, Month: 5, Day: 15},
|
0x367e57c6,
|
||||||
{Series: 173, Count: 72, Year: 2787, Month: 4, Day: 24},
|
0x369b4c48,
|
||||||
{Series: 174, Count: 79, Year: 2635, Month: 12, Day: 16},
|
0x3603c84f,
|
||||||
{Series: 175, Count: 74, Year: 2791, Month: 2, Day: 11},
|
0x369f25ca,
|
||||||
{Series: 176, Count: 79, Year: 2747, Month: 12, Day: 9},
|
0x3673c4cf,
|
||||||
{Series: 177, Count: 73, Year: 2704, Month: 10, Day: 5},
|
0x3648a2c9,
|
||||||
{Series: 178, Count: 70, Year: 2769, Month: 10, Day: 7},
|
0x3689a3c6,
|
||||||
{Series: 179, Count: 73, Year: 2816, Month: 9, Day: 27},
|
0x36b89dc9,
|
||||||
{Series: 180, Count: 71, Year: 2827, Month: 8, Day: 28},
|
0x36c38e47,
|
||||||
}
|
}
|
||||||
|
|||||||
@ -2,186 +2,186 @@ package eclipse
|
|||||||
|
|
||||||
// Code generated by /tmp/generate_saros_tables.go; DO NOT EDIT.
|
// Code generated by /tmp/generate_saros_tables.go; DO NOT EDIT.
|
||||||
|
|
||||||
var solarSarosAnchors = [...]sarosAnchor{
|
var solarSarosAnchors = [...]sarosMagic{
|
||||||
{Series: 0, Count: 72, Year: -2955, Month: 5, Day: 23},
|
0x202d5bc8,
|
||||||
{Series: 1, Count: 72, Year: -2872, Month: 6, Day: 4},
|
0x20806248,
|
||||||
{Series: 2, Count: 73, Year: -2861, Month: 5, Day: 4},
|
0x208b5249,
|
||||||
{Series: 3, Count: 72, Year: -2814, Month: 4, Day: 24},
|
0x20ba4c48,
|
||||||
{Series: 4, Count: 72, Year: -2731, Month: 5, Day: 6},
|
0x210d5348,
|
||||||
{Series: 5, Count: 73, Year: -2720, Month: 4, Day: 4},
|
0x21184249,
|
||||||
{Series: 6, Count: 72, Year: -2673, Month: 3, Day: 27},
|
0x21473dc8,
|
||||||
{Series: 7, Count: 72, Year: -2590, Month: 4, Day: 8},
|
0x219a4448,
|
||||||
{Series: 8, Count: 73, Year: -2579, Month: 3, Day: 7},
|
0x21a533c9,
|
||||||
{Series: 9, Count: 74, Year: -2568, Month: 2, Day: 6},
|
0x21b0234a,
|
||||||
{Series: 10, Count: 73, Year: -2467, Month: 2, Day: 28},
|
0x22152e49,
|
||||||
{Series: 11, Count: 76, Year: -2492, Month: 1, Day: 6},
|
0x21fc134c,
|
||||||
{Series: 12, Count: 86, Year: -2662, Month: 8, Day: 20},
|
0x21528a56,
|
||||||
{Series: 13, Count: 85, Year: -2543, Month: 9, Day: 23},
|
0x21c99bd5,
|
||||||
{Series: 14, Count: 85, Year: -2550, Month: 8, Day: 11},
|
0x21c285d5,
|
||||||
{Series: 15, Count: 75, Year: -2557, Month: 7, Day: 1},
|
0x21bb70cb,
|
||||||
{Series: 16, Count: 85, Year: -2456, Month: 7, Day: 23},
|
0x22207bd5,
|
||||||
{Series: 17, Count: 74, Year: -2427, Month: 7, Day: 3},
|
0x223d71ca,
|
||||||
{Series: 18, Count: 73, Year: -2416, Month: 6, Day: 2},
|
0x22486149,
|
||||||
{Series: 19, Count: 73, Year: -2333, Month: 6, Day: 15},
|
0x229b67c9,
|
||||||
{Series: 20, Count: 72, Year: -2286, Month: 6, Day: 5},
|
0x22ca62c8,
|
||||||
{Series: 21, Count: 72, Year: -2275, Month: 5, Day: 5},
|
0x22d552c8,
|
||||||
{Series: 22, Count: 71, Year: -2174, Month: 5, Day: 28},
|
0x233a5e47,
|
||||||
{Series: 23, Count: 72, Year: -2145, Month: 5, Day: 7},
|
0x235753c8,
|
||||||
{Series: 24, Count: 72, Year: -2134, Month: 4, Day: 6},
|
0x23624348,
|
||||||
{Series: 25, Count: 71, Year: -2033, Month: 4, Day: 30},
|
0x23c74f47,
|
||||||
{Series: 26, Count: 72, Year: -2004, Month: 4, Day: 8},
|
0x23e44448,
|
||||||
{Series: 27, Count: 72, Year: -1993, Month: 3, Day: 9},
|
0x23ef34c8,
|
||||||
{Series: 28, Count: 72, Year: -1910, Month: 3, Day: 22},
|
0x24423b48,
|
||||||
{Series: 29, Count: 73, Year: -1881, Month: 3, Day: 1},
|
0x245f30c9,
|
||||||
{Series: 30, Count: 83, Year: -2051, Month: 10, Day: 12},
|
0x23b5a653,
|
||||||
{Series: 31, Count: 74, Year: -1805, Month: 1, Day: 31},
|
0x24ab1fca,
|
||||||
{Series: 32, Count: 84, Year: -1957, Month: 9, Day: 24},
|
0x24139c54,
|
||||||
{Series: 33, Count: 84, Year: -1982, Month: 8, Day: 2},
|
0x23fa8154,
|
||||||
{Series: 34, Count: 86, Year: -1917, Month: 8, Day: 4},
|
0x243b8256,
|
||||||
{Series: 35, Count: 84, Year: -1870, Month: 7, Day: 25},
|
0x246a7cd4,
|
||||||
{Series: 36, Count: 73, Year: -1859, Month: 6, Day: 23},
|
0x24756bc9,
|
||||||
{Series: 37, Count: 73, Year: -1794, Month: 6, Day: 25},
|
0x24b66cc9,
|
||||||
{Series: 38, Count: 73, Year: -1729, Month: 6, Day: 26},
|
0x24f76d49,
|
||||||
{Series: 39, Count: 72, Year: -1718, Month: 5, Day: 26},
|
0x25025d48,
|
||||||
{Series: 40, Count: 72, Year: -1653, Month: 5, Day: 28},
|
0x25435e48,
|
||||||
{Series: 41, Count: 72, Year: -1588, Month: 5, Day: 28},
|
0x25845e48,
|
||||||
{Series: 42, Count: 72, Year: -1577, Month: 4, Day: 28},
|
0x258f4e48,
|
||||||
{Series: 43, Count: 72, Year: -1512, Month: 4, Day: 29},
|
0x25d04ec8,
|
||||||
{Series: 44, Count: 72, Year: -1447, Month: 4, Day: 30},
|
0x26114f48,
|
||||||
{Series: 45, Count: 72, Year: -1436, Month: 3, Day: 30},
|
0x261c3f48,
|
||||||
{Series: 46, Count: 72, Year: -1371, Month: 4, Day: 1},
|
0x265d40c8,
|
||||||
{Series: 47, Count: 72, Year: -1306, Month: 4, Day: 2},
|
0x269e4148,
|
||||||
{Series: 48, Count: 74, Year: -1331, Month: 2, Day: 8},
|
0x2685244a,
|
||||||
{Series: 49, Count: 72, Year: -1248, Month: 2, Day: 22},
|
0x26d82b48,
|
||||||
{Series: 50, Count: 73, Year: -1201, Month: 2, Day: 11},
|
0x270725c9,
|
||||||
{Series: 51, Count: 85, Year: -1407, Month: 9, Day: 2},
|
0x26399155,
|
||||||
{Series: 52, Count: 86, Year: -1378, Month: 8, Day: 14},
|
0x26568756,
|
||||||
{Series: 53, Count: 84, Year: -1277, Month: 9, Day: 6},
|
0x26bb9354,
|
||||||
{Series: 54, Count: 74, Year: -1284, Month: 7, Day: 25},
|
0x26b47cca,
|
||||||
{Series: 55, Count: 73, Year: -1255, Month: 7, Day: 6},
|
0x26d17349,
|
||||||
{Series: 56, Count: 74, Year: -1172, Month: 7, Day: 17},
|
0x272478ca,
|
||||||
{Series: 57, Count: 73, Year: -1161, Month: 6, Day: 17},
|
0x272f68c9,
|
||||||
{Series: 58, Count: 72, Year: -1114, Month: 6, Day: 7},
|
0x275e63c8,
|
||||||
{Series: 59, Count: 72, Year: -1031, Month: 6, Day: 19},
|
0x27b169c8,
|
||||||
{Series: 60, Count: 72, Year: -1020, Month: 5, Day: 18},
|
0x27bc5948,
|
||||||
{Series: 61, Count: 71, Year: -973, Month: 5, Day: 10},
|
0x27eb5547,
|
||||||
{Series: 62, Count: 71, Year: -890, Month: 5, Day: 22},
|
0x283e5b47,
|
||||||
{Series: 63, Count: 72, Year: -879, Month: 4, Day: 20},
|
0x28494a48,
|
||||||
{Series: 64, Count: 71, Year: -832, Month: 4, Day: 11},
|
0x287845c7,
|
||||||
{Series: 65, Count: 71, Year: -749, Month: 4, Day: 24},
|
0x28cb4c47,
|
||||||
{Series: 66, Count: 73, Year: -756, Month: 3, Day: 12},
|
0x28c43649,
|
||||||
{Series: 67, Count: 72, Year: -709, Month: 3, Day: 4},
|
0x28f33248,
|
||||||
{Series: 68, Count: 72, Year: -626, Month: 3, Day: 16},
|
0x29463848,
|
||||||
{Series: 69, Count: 78, Year: -724, Month: 12, Day: 9},
|
0x28e4c4ce,
|
||||||
{Series: 70, Count: 84, Year: -821, Month: 9, Day: 5},
|
0x288392d4,
|
||||||
{Series: 71, Count: 82, Year: -684, Month: 10, Day: 19},
|
0x290ca9d2,
|
||||||
{Series: 72, Count: 83, Year: -727, Month: 8, Day: 16},
|
0x28e18853,
|
||||||
{Series: 73, Count: 72, Year: -698, Month: 7, Day: 27},
|
0x28fe7dc8,
|
||||||
{Series: 74, Count: 75, Year: -615, Month: 8, Day: 8},
|
0x2951844b,
|
||||||
{Series: 75, Count: 73, Year: -604, Month: 7, Day: 7},
|
0x295c73c9,
|
||||||
{Series: 76, Count: 72, Year: -575, Month: 6, Day: 18},
|
0x29796948,
|
||||||
{Series: 77, Count: 71, Year: -474, Month: 7, Day: 11},
|
0x29de75c7,
|
||||||
{Series: 78, Count: 72, Year: -463, Month: 6, Day: 9},
|
0x29e964c8,
|
||||||
{Series: 79, Count: 71, Year: -434, Month: 5, Day: 21},
|
0x2a065ac7,
|
||||||
{Series: 80, Count: 71, Year: -333, Month: 6, Day: 13},
|
0x2a6b66c7,
|
||||||
{Series: 81, Count: 72, Year: -322, Month: 5, Day: 12},
|
0x2a765648,
|
||||||
{Series: 82, Count: 71, Year: -293, Month: 4, Day: 22},
|
0x2a934b47,
|
||||||
{Series: 83, Count: 71, Year: -210, Month: 5, Day: 5},
|
0x2ae652c7,
|
||||||
{Series: 84, Count: 72, Year: -181, Month: 4, Day: 14},
|
0x2b034748,
|
||||||
{Series: 85, Count: 72, Year: -170, Month: 3, Day: 14},
|
0x2b0e3748,
|
||||||
{Series: 86, Count: 71, Year: -69, Month: 4, Day: 6},
|
0x2b734347,
|
||||||
{Series: 87, Count: 73, Year: -76, Month: 2, Day: 23},
|
0x2b6c2bc9,
|
||||||
{Series: 88, Count: 83, Year: -246, Month: 10, Day: 6},
|
0x2ac2a353,
|
||||||
{Series: 89, Count: 73, Year: 18, Month: 2, Day: 4},
|
0x2bca2249,
|
||||||
{Series: 90, Count: 83, Year: -134, Month: 9, Day: 28},
|
0x2b329e53,
|
||||||
{Series: 91, Count: 75, Year: -159, Month: 8, Day: 6},
|
0x2b19834b,
|
||||||
{Series: 92, Count: 74, Year: -76, Month: 8, Day: 19},
|
0x2b6c89ca,
|
||||||
{Series: 93, Count: 74, Year: -29, Month: 8, Day: 9},
|
0x2b9b84ca,
|
||||||
{Series: 94, Count: 72, Year: -18, Month: 7, Day: 9},
|
0x2ba674c8,
|
||||||
{Series: 95, Count: 71, Year: 47, Month: 7, Day: 11},
|
0x2be775c7,
|
||||||
{Series: 96, Count: 72, Year: 94, Month: 7, Day: 1},
|
0x2c1670c8,
|
||||||
{Series: 97, Count: 71, Year: 123, Month: 6, Day: 11},
|
0x2c3365c7,
|
||||||
{Series: 98, Count: 71, Year: 188, Month: 6, Day: 12},
|
0x2c746647,
|
||||||
{Series: 99, Count: 72, Year: 235, Month: 6, Day: 3},
|
0x2ca361c8,
|
||||||
{Series: 100, Count: 71, Year: 264, Month: 5, Day: 13},
|
0x2cc056c7,
|
||||||
{Series: 101, Count: 71, Year: 329, Month: 5, Day: 15},
|
0x2d0157c7,
|
||||||
{Series: 102, Count: 71, Year: 376, Month: 5, Day: 5},
|
0x2d3052c7,
|
||||||
{Series: 103, Count: 72, Year: 387, Month: 4, Day: 4},
|
0x2d3b4248,
|
||||||
{Series: 104, Count: 70, Year: 470, Month: 4, Day: 17},
|
0x2d8e48c6,
|
||||||
{Series: 105, Count: 72, Year: 499, Month: 3, Day: 27},
|
0x2dab3dc8,
|
||||||
{Series: 106, Count: 75, Year: 456, Month: 1, Day: 23},
|
0x2d801bcb,
|
||||||
{Series: 107, Count: 72, Year: 557, Month: 2, Day: 15},
|
0x2de527c8,
|
||||||
{Series: 108, Count: 76, Year: 550, Month: 1, Day: 4},
|
0x2dde124c,
|
||||||
{Series: 109, Count: 81, Year: 416, Month: 9, Day: 7},
|
0x2d5893d1,
|
||||||
{Series: 110, Count: 72, Year: 463, Month: 8, Day: 30},
|
0x2d878f48,
|
||||||
{Series: 111, Count: 79, Year: 528, Month: 8, Day: 30},
|
0x2dc88f4f,
|
||||||
{Series: 112, Count: 72, Year: 539, Month: 7, Day: 31},
|
0x2dd37fc8,
|
||||||
{Series: 113, Count: 71, Year: 586, Month: 7, Day: 22},
|
0x2e027b47,
|
||||||
{Series: 114, Count: 72, Year: 651, Month: 7, Day: 23},
|
0x2e437bc8,
|
||||||
{Series: 115, Count: 72, Year: 662, Month: 6, Day: 21},
|
0x2e4e6ac8,
|
||||||
{Series: 116, Count: 70, Year: 727, Month: 6, Day: 23},
|
0x2e8f6bc6,
|
||||||
{Series: 117, Count: 71, Year: 792, Month: 6, Day: 24},
|
0x2ed06c47,
|
||||||
{Series: 118, Count: 72, Year: 803, Month: 5, Day: 24},
|
0x2edb5c48,
|
||||||
{Series: 119, Count: 71, Year: 850, Month: 5, Day: 15},
|
0x2f0a57c7,
|
||||||
{Series: 120, Count: 71, Year: 933, Month: 5, Day: 27},
|
0x2f5d5dc7,
|
||||||
{Series: 121, Count: 71, Year: 944, Month: 4, Day: 25},
|
0x2f684cc7,
|
||||||
{Series: 122, Count: 70, Year: 991, Month: 4, Day: 17},
|
0x2f9748c6,
|
||||||
{Series: 123, Count: 70, Year: 1074, Month: 4, Day: 29},
|
0x2fea4ec6,
|
||||||
{Series: 124, Count: 73, Year: 1049, Month: 3, Day: 6},
|
0x2fd13349,
|
||||||
{Series: 125, Count: 73, Year: 1060, Month: 2, Day: 4},
|
0x2fdc2249,
|
||||||
{Series: 126, Count: 72, Year: 1179, Month: 3, Day: 10},
|
0x30533548,
|
||||||
{Series: 127, Count: 82, Year: 991, Month: 10, Day: 10},
|
0x2f97a552,
|
||||||
{Series: 128, Count: 73, Year: 984, Month: 8, Day: 29},
|
0x2f908ec9,
|
||||||
{Series: 129, Count: 80, Year: 1103, Month: 10, Day: 3},
|
0x3007a1d0,
|
||||||
{Series: 130, Count: 73, Year: 1096, Month: 8, Day: 20},
|
0x30008a49,
|
||||||
{Series: 131, Count: 70, Year: 1125, Month: 8, Day: 1},
|
0x301d80c6,
|
||||||
{Series: 132, Count: 71, Year: 1208, Month: 8, Day: 13},
|
0x307086c7,
|
||||||
{Series: 133, Count: 72, Year: 1219, Month: 7, Day: 13},
|
0x307b76c8,
|
||||||
{Series: 134, Count: 71, Year: 1248, Month: 6, Day: 22},
|
0x30986b47,
|
||||||
{Series: 135, Count: 71, Year: 1331, Month: 7, Day: 5},
|
0x30eb72c7,
|
||||||
{Series: 136, Count: 71, Year: 1360, Month: 6, Day: 14},
|
0x31086747,
|
||||||
{Series: 137, Count: 70, Year: 1389, Month: 5, Day: 25},
|
0x31255cc6,
|
||||||
{Series: 138, Count: 70, Year: 1472, Month: 6, Day: 6},
|
0x31786346,
|
||||||
{Series: 139, Count: 71, Year: 1501, Month: 5, Day: 17},
|
0x319558c7,
|
||||||
{Series: 140, Count: 71, Year: 1512, Month: 4, Day: 16},
|
0x31a04847,
|
||||||
{Series: 141, Count: 70, Year: 1613, Month: 5, Day: 19},
|
0x320559c6,
|
||||||
{Series: 142, Count: 72, Year: 1624, Month: 4, Day: 17},
|
0x321048c8,
|
||||||
{Series: 143, Count: 72, Year: 1617, Month: 3, Day: 7},
|
0x320933c8,
|
||||||
{Series: 144, Count: 70, Year: 1736, Month: 4, Day: 11},
|
0x328045c6,
|
||||||
{Series: 145, Count: 77, Year: 1639, Month: 1, Day: 4},
|
0x321f124d,
|
||||||
{Series: 146, Count: 76, Year: 1541, Month: 9, Day: 19},
|
0x31bd99cc,
|
||||||
{Series: 147, Count: 80, Year: 1624, Month: 10, Day: 12},
|
0x3210a650,
|
||||||
{Series: 148, Count: 75, Year: 1653, Month: 9, Day: 21},
|
0x322d9acb,
|
||||||
{Series: 149, Count: 71, Year: 1664, Month: 8, Day: 21},
|
0x32388ac7,
|
||||||
{Series: 150, Count: 71, Year: 1729, Month: 8, Day: 24},
|
0x32798c47,
|
||||||
{Series: 151, Count: 72, Year: 1776, Month: 8, Day: 14},
|
0x32a88748,
|
||||||
{Series: 152, Count: 70, Year: 1805, Month: 7, Day: 26},
|
0x32c57d46,
|
||||||
{Series: 153, Count: 70, Year: 1870, Month: 7, Day: 28},
|
0x33067e46,
|
||||||
{Series: 154, Count: 71, Year: 1917, Month: 7, Day: 19},
|
0x333579c7,
|
||||||
{Series: 155, Count: 71, Year: 1928, Month: 6, Day: 17},
|
0x334068c7,
|
||||||
{Series: 156, Count: 69, Year: 2011, Month: 7, Day: 1},
|
0x339370c5,
|
||||||
{Series: 157, Count: 70, Year: 2058, Month: 6, Day: 21},
|
0x33c26ac6,
|
||||||
{Series: 158, Count: 70, Year: 2069, Month: 5, Day: 20},
|
0x33cd5a46,
|
||||||
{Series: 159, Count: 70, Year: 2134, Month: 5, Day: 23},
|
0x340e5bc6,
|
||||||
{Series: 160, Count: 71, Year: 2181, Month: 5, Day: 13},
|
0x343d56c7,
|
||||||
{Series: 161, Count: 72, Year: 2174, Month: 4, Day: 1},
|
0x343640c8,
|
||||||
{Series: 162, Count: 70, Year: 2257, Month: 4, Day: 15},
|
0x348947c6,
|
||||||
{Series: 163, Count: 72, Year: 2286, Month: 3, Day: 25},
|
0x34a63cc8,
|
||||||
{Series: 164, Count: 80, Year: 2098, Month: 10, Day: 24},
|
0x33eaac50,
|
||||||
{Series: 165, Count: 72, Year: 2145, Month: 10, Day: 16},
|
0x3419a848,
|
||||||
{Series: 166, Count: 77, Year: 2228, Month: 10, Day: 29},
|
0x346caecd,
|
||||||
{Series: 167, Count: 72, Year: 2203, Month: 9, Day: 6},
|
0x34539348,
|
||||||
{Series: 168, Count: 70, Year: 2250, Month: 8, Day: 28},
|
0x34828e46,
|
||||||
{Series: 169, Count: 71, Year: 2333, Month: 9, Day: 10},
|
0x34d59547,
|
||||||
{Series: 170, Count: 71, Year: 2344, Month: 8, Day: 9},
|
0x34e084c7,
|
||||||
{Series: 171, Count: 69, Year: 2391, Month: 8, Day: 1},
|
0x350f80c5,
|
||||||
{Series: 172, Count: 70, Year: 2474, Month: 8, Day: 13},
|
0x356286c6,
|
||||||
{Series: 173, Count: 70, Year: 2485, Month: 7, Day: 12},
|
0x356d7646,
|
||||||
{Series: 174, Count: 69, Year: 2532, Month: 7, Day: 4},
|
0x359c7245,
|
||||||
{Series: 175, Count: 70, Year: 2597, Month: 7, Day: 5},
|
0x35dd72c6,
|
||||||
{Series: 176, Count: 71, Year: 2608, Month: 6, Day: 4},
|
0x35e86247,
|
||||||
{Series: 177, Count: 69, Year: 2655, Month: 5, Day: 27},
|
0x36175dc5,
|
||||||
{Series: 178, Count: 70, Year: 2738, Month: 6, Day: 9},
|
0x366a64c6,
|
||||||
{Series: 179, Count: 71, Year: 2731, Month: 4, Day: 28},
|
0x36634e47,
|
||||||
{Series: 180, Count: 70, Year: 2760, Month: 4, Day: 8},
|
0x36804446,
|
||||||
}
|
}
|
||||||
|
|||||||
@ -117,10 +117,10 @@ func TestSolarPathAndFootprintsCarrySaros(t *testing.T) {
|
|||||||
}
|
}
|
||||||
|
|
||||||
func TestSarosAnchorSanity(t *testing.T) {
|
func TestSarosAnchorSanity(t *testing.T) {
|
||||||
assertSarosAnchorTable(t, solarSarosAnchors[:], true)
|
assertSarosAnchorTable(t, solarSarosAnchors[:], 0)
|
||||||
assertSarosAnchorTable(t, lunarSarosAnchors[:], false)
|
assertSarosAnchorTable(t, lunarSarosAnchors[:], 1)
|
||||||
assertSarosHeadOverrides(t, solarSarosHeadOverrides[:], solarSarosAnchors[:])
|
assertSarosHeadOverrides(t, solarSarosHeadOverrides[:], solarSarosAnchors[:], 0)
|
||||||
assertSarosHeadOverrides(t, lunarSarosHeadOverrides[:], lunarSarosAnchors[:])
|
assertSarosHeadOverrides(t, lunarSarosHeadOverrides[:], lunarSarosAnchors[:], 1)
|
||||||
}
|
}
|
||||||
|
|
||||||
func assertSarosInfo(t *testing.T, has bool, got SarosInfo, wantSeries, wantMember, wantCount int) {
|
func assertSarosInfo(t *testing.T, has bool, got SarosInfo, wantSeries, wantMember, wantCount int) {
|
||||||
@ -141,14 +141,15 @@ func assertSarosInfo(t *testing.T, has bool, got SarosInfo, wantSeries, wantMemb
|
|||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
func assertSarosAnchorTable(t *testing.T, anchors []sarosAnchor, solar bool) {
|
func assertSarosAnchorTable(t *testing.T, anchors []sarosMagic, seriesBase int) {
|
||||||
t.Helper()
|
t.Helper()
|
||||||
if len(anchors) == 0 {
|
if len(anchors) == 0 {
|
||||||
t.Fatal("expected non-empty Saros anchor table")
|
t.Fatal("expected non-empty Saros anchor table")
|
||||||
}
|
}
|
||||||
seenDates := make(map[[3]int]int, len(anchors))
|
seenDates := make(map[[3]int]int, len(anchors))
|
||||||
lastSeries := int(anchors[0].Series) - 1
|
lastSeries := seriesBase - 1
|
||||||
for _, anchor := range anchors {
|
for index, magic := range anchors {
|
||||||
|
anchor := decodeSarosMagic(magic, seriesBase+index)
|
||||||
series := int(anchor.Series)
|
series := int(anchor.Series)
|
||||||
if series <= lastSeries {
|
if series <= lastSeries {
|
||||||
t.Fatalf("series not strictly increasing: prev=%d current=%d", lastSeries, series)
|
t.Fatalf("series not strictly increasing: prev=%d current=%d", lastSeries, series)
|
||||||
@ -163,25 +164,20 @@ func assertSarosAnchorTable(t *testing.T, anchors []sarosAnchor, solar bool) {
|
|||||||
}
|
}
|
||||||
seenDates[dateKey] = series
|
seenDates[dateKey] = series
|
||||||
}
|
}
|
||||||
if solar {
|
if got := int(decodeSarosMagic(anchors[0], seriesBase).Series); got != seriesBase {
|
||||||
if got := int(anchors[0].Series); got != 0 {
|
t.Fatalf("unexpected first series: got %d want %d", got, seriesBase)
|
||||||
t.Fatalf("unexpected first solar series: got %d want 0", got)
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
if got := int(anchors[0].Series); got != 1 {
|
|
||||||
t.Fatalf("unexpected first lunar series: got %d want 1", got)
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
func assertSarosHeadOverrides(t *testing.T, overrides []sarosHeadOverride, anchors []sarosAnchor) {
|
func assertSarosHeadOverrides(t *testing.T, overrides []sarosHeadOverride, anchors []sarosMagic, seriesBase int) {
|
||||||
t.Helper()
|
t.Helper()
|
||||||
if len(overrides) == 0 {
|
if len(overrides) == 0 {
|
||||||
return
|
return
|
||||||
}
|
}
|
||||||
seenHeads := make(map[[3]int]int, len(overrides))
|
seenHeads := make(map[[3]int]int, len(overrides))
|
||||||
anchorSeries := make(map[int]int, len(anchors))
|
anchorSeries := make(map[int]int, len(anchors))
|
||||||
for _, anchor := range anchors {
|
for index, magic := range anchors {
|
||||||
|
anchor := decodeSarosMagic(magic, seriesBase+index)
|
||||||
anchorSeries[int(anchor.Series)] = int(anchor.Count)
|
anchorSeries[int(anchor.Series)] = int(anchor.Count)
|
||||||
}
|
}
|
||||||
for _, override := range overrides {
|
for _, override := range overrides {
|
||||||
|
|||||||
36
eclipse/search_skip.go
Normal file
36
eclipse/search_skip.go
Normal file
@ -0,0 +1,36 @@
|
|||||||
|
package eclipse
|
||||||
|
|
||||||
|
import (
|
||||||
|
"math"
|
||||||
|
|
||||||
|
"b612.me/astro/basic"
|
||||||
|
)
|
||||||
|
|
||||||
|
const (
|
||||||
|
eclipseSeasonNodeDistanceLimitDeg = 35.0
|
||||||
|
eclipseSeasonMaxSearchStep = 4
|
||||||
|
)
|
||||||
|
|
||||||
|
func nextEclipseSearchCandidateTT(candidateTT float64, phaseType, direction int, synodicMonthDays float64) float64 {
|
||||||
|
step := eclipseSearchStep(candidateTT, direction, synodicMonthDays)
|
||||||
|
return basic.CalcMoonSHByJDE(candidateTT+float64(direction*step)*synodicMonthDays, phaseType)
|
||||||
|
}
|
||||||
|
|
||||||
|
func eclipseSearchStep(candidateTT float64, direction int, synodicMonthDays float64) int {
|
||||||
|
step := 1
|
||||||
|
for nextStep := 2; nextStep <= eclipseSeasonMaxSearchStep; nextStep++ {
|
||||||
|
skippedTT := candidateTT + float64(direction*(nextStep-1))*synodicMonthDays
|
||||||
|
if eclipseNodeDistance(skippedTT) < eclipseSeasonNodeDistanceLimitDeg {
|
||||||
|
break
|
||||||
|
}
|
||||||
|
step = nextStep
|
||||||
|
}
|
||||||
|
return step
|
||||||
|
}
|
||||||
|
|
||||||
|
func eclipseNodeDistance(ttJDE float64) float64 {
|
||||||
|
argument := normalizeDegree360(basic.MoonLonX(ttJDE))
|
||||||
|
toAscending := math.Min(argument, 360-argument)
|
||||||
|
toDescending := math.Abs(argument - 180)
|
||||||
|
return math.Min(toAscending, toDescending)
|
||||||
|
}
|
||||||
73
eclipse/search_skip_test.go
Normal file
73
eclipse/search_skip_test.go
Normal file
@ -0,0 +1,73 @@
|
|||||||
|
package eclipse
|
||||||
|
|
||||||
|
import (
|
||||||
|
"testing"
|
||||||
|
"time"
|
||||||
|
|
||||||
|
"b612.me/astro/basic"
|
||||||
|
)
|
||||||
|
|
||||||
|
func TestEclipseSearchStepDoesNotSkipPotentialCandidates(t *testing.T) {
|
||||||
|
testCases := []struct {
|
||||||
|
name string
|
||||||
|
phaseType int
|
||||||
|
synodicMonthDays float64
|
||||||
|
potential func(float64) bool
|
||||||
|
}{
|
||||||
|
{
|
||||||
|
name: "solar",
|
||||||
|
phaseType: 0,
|
||||||
|
synodicMonthDays: solarEclipseSynodicMonthDays,
|
||||||
|
potential: isPotentialSolarEclipse,
|
||||||
|
},
|
||||||
|
{
|
||||||
|
name: "lunar",
|
||||||
|
phaseType: 1,
|
||||||
|
synodicMonthDays: lunarEclipseSynodicMonthDays,
|
||||||
|
potential: isPotentialLunarEclipse,
|
||||||
|
},
|
||||||
|
}
|
||||||
|
|
||||||
|
for _, tc := range testCases {
|
||||||
|
t.Run(tc.name, func(t *testing.T) {
|
||||||
|
candidates := eclipseSearchTestCandidates(1600, 800, tc.phaseType, tc.synodicMonthDays)
|
||||||
|
|
||||||
|
for index, candidateTT := range candidates {
|
||||||
|
for _, direction := range []int{-1, 1} {
|
||||||
|
step := eclipseSearchStep(candidateTT, direction, tc.synodicMonthDays)
|
||||||
|
for offset := 1; offset < step; offset++ {
|
||||||
|
skippedIndex := index + direction*offset
|
||||||
|
if skippedIndex < 0 || skippedIndex >= len(candidates) {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
if tc.potential(candidates[skippedIndex]) {
|
||||||
|
t.Fatalf(
|
||||||
|
"%s skip crosses potential candidate: index=%d direction=%d step=%d offset=%d jd=%.8f",
|
||||||
|
tc.name,
|
||||||
|
index,
|
||||||
|
direction,
|
||||||
|
step,
|
||||||
|
offset,
|
||||||
|
candidates[skippedIndex],
|
||||||
|
)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func eclipseSearchTestCandidates(startYear, years, phaseType int, synodicMonthDays float64) []float64 {
|
||||||
|
startTT := basic.Date2JDE(time.Date(startYear, 1, 1, 0, 0, 0, 0, time.UTC))
|
||||||
|
endTT := basic.Date2JDE(time.Date(startYear+years, 1, 1, 0, 0, 0, 0, time.UTC))
|
||||||
|
candidateTT := basic.CalcMoonSHByJDE(startTT, phaseType)
|
||||||
|
candidates := make([]float64, 0, years*13)
|
||||||
|
for candidateTT < endTT {
|
||||||
|
if candidateTT >= startTT {
|
||||||
|
candidates = append(candidates, candidateTT)
|
||||||
|
}
|
||||||
|
candidateTT = basic.CalcMoonSHByJDE(candidateTT+synodicMonthDays, phaseType)
|
||||||
|
}
|
||||||
|
return candidates
|
||||||
|
}
|
||||||
@ -11,6 +11,7 @@ const (
|
|||||||
solarEclipseSynodicMonthDays = 29.530588853
|
solarEclipseSynodicMonthDays = 29.530588853
|
||||||
solarEclipseSearchLimit = 36
|
solarEclipseSearchLimit = 36
|
||||||
solarEclipseSearchEpsilonDay = 1e-8
|
solarEclipseSearchEpsilonDay = 1e-8
|
||||||
|
solarEclipseLatitudeLimitDeg = 2.0
|
||||||
)
|
)
|
||||||
|
|
||||||
type solarEclipseCalculator func(float64) basic.SolarEclipseResult
|
type solarEclipseCalculator func(float64) basic.SolarEclipseResult
|
||||||
@ -236,16 +237,22 @@ func searchSolarEclipse(
|
|||||||
candidateTT := basic.CalcMoonSHByJDE(targetTT, 0)
|
candidateTT := basic.CalcMoonSHByJDE(targetTT, 0)
|
||||||
|
|
||||||
for i := 0; i < solarEclipseSearchLimit; i++ {
|
for i := 0; i < solarEclipseSearchLimit; i++ {
|
||||||
|
if isPotentialSolarEclipse(candidateTT) {
|
||||||
result := calculator(candidateTT)
|
result := calculator(candidateTT)
|
||||||
if result.Type != basic.SolarEclipseNone && solarEclipseMatchesDirection(result.GreatestEclipse, targetTT, direction, includeCurrent) {
|
if result.Type != basic.SolarEclipseNone && solarEclipseMatchesDirection(result.GreatestEclipse, targetTT, direction, includeCurrent) {
|
||||||
return solarEclipseInfoFromBasic(result, date.Location()), true
|
return solarEclipseInfoFromBasic(result, date.Location()), true
|
||||||
}
|
}
|
||||||
candidateTT = basic.CalcMoonSHByJDE(candidateTT+float64(direction)*solarEclipseSynodicMonthDays, 0)
|
}
|
||||||
|
candidateTT = nextEclipseSearchCandidateTT(candidateTT, 0, direction, solarEclipseSynodicMonthDays)
|
||||||
}
|
}
|
||||||
|
|
||||||
return SolarEclipseInfo{}, false
|
return SolarEclipseInfo{}, false
|
||||||
}
|
}
|
||||||
|
|
||||||
|
func isPotentialSolarEclipse(newMoonTT float64) bool {
|
||||||
|
return math.Abs(basic.HMoonTrueBo(newMoonTT)) <= solarEclipseLatitudeLimitDeg
|
||||||
|
}
|
||||||
|
|
||||||
func solarEclipseMatchesDirection(greatestTT, targetTT float64, direction int, includeCurrent bool) bool {
|
func solarEclipseMatchesDirection(greatestTT, targetTT float64, direction int, includeCurrent bool) bool {
|
||||||
delta := greatestTT - targetTT
|
delta := greatestTT - targetTT
|
||||||
if math.Abs(delta) <= solarEclipseSearchEpsilonDay {
|
if math.Abs(delta) <= solarEclipseSearchEpsilonDay {
|
||||||
|
|||||||
@ -217,6 +217,18 @@ func LastGeometricLocalSolarEclipseIAUSingleK(date time.Time, lon, lat, height f
|
|||||||
return info
|
return info
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// LastLocalTotalSolarEclipse 上次站心日全食 / previous local total solar eclipse.
|
||||||
|
// Previous visible local total solar eclipse, using NASA bulletin Split-K by default.
|
||||||
|
func LastLocalTotalSolarEclipse(date time.Time, lon, lat, height float64) (LocalSolarEclipseInfo, bool) {
|
||||||
|
return searchLocalTotalSolarEclipse(date, lon, lat, height, -1, true, localSolarEclipseNASABulletinSplitK, localSolarEclipseQueryVisible)
|
||||||
|
}
|
||||||
|
|
||||||
|
// LastLocalAnnularSolarEclipse 上次站心日环食 / previous local annular solar eclipse.
|
||||||
|
// Previous visible local annular solar eclipse, using NASA bulletin Split-K by default.
|
||||||
|
func LastLocalAnnularSolarEclipse(date time.Time, lon, lat, height float64) (LocalSolarEclipseInfo, bool) {
|
||||||
|
return searchLocalAnnularSolarEclipse(date, lon, lat, height, -1, true, localSolarEclipseNASABulletinSplitK, localSolarEclipseQueryVisible)
|
||||||
|
}
|
||||||
|
|
||||||
// NextLocalSolarEclipse 下次站心日食 / next local solar eclipse.
|
// NextLocalSolarEclipse 下次站心日食 / next local solar eclipse.
|
||||||
// Next visible local solar eclipse, using NASA bulletin Split-K by default.
|
// Next visible local solar eclipse, using NASA bulletin Split-K by default.
|
||||||
func NextLocalSolarEclipse(date time.Time, lon, lat, height float64) LocalSolarEclipseInfo {
|
func NextLocalSolarEclipse(date time.Time, lon, lat, height float64) LocalSolarEclipseInfo {
|
||||||
@ -257,6 +269,18 @@ func NextGeometricLocalSolarEclipseIAUSingleK(date time.Time, lon, lat, height f
|
|||||||
return info
|
return info
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// NextLocalTotalSolarEclipse 下次站心日全食 / next local total solar eclipse.
|
||||||
|
// Next visible local total solar eclipse, using NASA bulletin Split-K by default.
|
||||||
|
func NextLocalTotalSolarEclipse(date time.Time, lon, lat, height float64) (LocalSolarEclipseInfo, bool) {
|
||||||
|
return searchLocalTotalSolarEclipse(date, lon, lat, height, 1, false, localSolarEclipseNASABulletinSplitK, localSolarEclipseQueryVisible)
|
||||||
|
}
|
||||||
|
|
||||||
|
// NextLocalAnnularSolarEclipse 下次站心日环食 / next local annular solar eclipse.
|
||||||
|
// Next visible local annular solar eclipse, using NASA bulletin Split-K by default.
|
||||||
|
func NextLocalAnnularSolarEclipse(date time.Time, lon, lat, height float64) (LocalSolarEclipseInfo, bool) {
|
||||||
|
return searchLocalAnnularSolarEclipse(date, lon, lat, height, 1, false, localSolarEclipseNASABulletinSplitK, localSolarEclipseQueryVisible)
|
||||||
|
}
|
||||||
|
|
||||||
// ClosestLocalSolarEclipse 最近一次站心日食 / closest local solar eclipse.
|
// ClosestLocalSolarEclipse 最近一次站心日食 / closest local solar eclipse.
|
||||||
// Closest visible local solar eclipse, using NASA bulletin Split-K by default.
|
// Closest visible local solar eclipse, using NASA bulletin Split-K by default.
|
||||||
func ClosestLocalSolarEclipse(date time.Time, lon, lat, height float64) LocalSolarEclipseInfo {
|
func ClosestLocalSolarEclipse(date time.Time, lon, lat, height float64) LocalSolarEclipseInfo {
|
||||||
@ -301,6 +325,22 @@ func ClosestGeometricLocalSolarEclipseIAUSingleK(date time.Time, lon, lat, heigh
|
|||||||
return closestLocalSolarEclipse(date, last, hasLast, next, hasNext)
|
return closestLocalSolarEclipse(date, last, hasLast, next, hasNext)
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// ClosestLocalTotalSolarEclipse 最近一次站心日全食 / closest local total solar eclipse.
|
||||||
|
// Closest visible local total solar eclipse, using NASA bulletin Split-K by default.
|
||||||
|
func ClosestLocalTotalSolarEclipse(date time.Time, lon, lat, height float64) (LocalSolarEclipseInfo, bool) {
|
||||||
|
last, hasLast := searchLocalTotalSolarEclipse(date, lon, lat, height, -1, true, localSolarEclipseNASABulletinSplitK, localSolarEclipseQueryVisible)
|
||||||
|
next, hasNext := searchLocalTotalSolarEclipse(date, lon, lat, height, 1, false, localSolarEclipseNASABulletinSplitK, localSolarEclipseQueryVisible)
|
||||||
|
return closestLocalSolarEclipseResult(date, last, hasLast, next, hasNext)
|
||||||
|
}
|
||||||
|
|
||||||
|
// ClosestLocalAnnularSolarEclipse 最近一次站心日环食 / closest local annular solar eclipse.
|
||||||
|
// Closest visible local annular solar eclipse, using NASA bulletin Split-K by default.
|
||||||
|
func ClosestLocalAnnularSolarEclipse(date time.Time, lon, lat, height float64) (LocalSolarEclipseInfo, bool) {
|
||||||
|
last, hasLast := searchLocalAnnularSolarEclipse(date, lon, lat, height, -1, true, localSolarEclipseNASABulletinSplitK, localSolarEclipseQueryVisible)
|
||||||
|
next, hasNext := searchLocalAnnularSolarEclipse(date, lon, lat, height, 1, false, localSolarEclipseNASABulletinSplitK, localSolarEclipseQueryVisible)
|
||||||
|
return closestLocalSolarEclipseResult(date, last, hasLast, next, hasNext)
|
||||||
|
}
|
||||||
|
|
||||||
func closestLocalSolarEclipse(
|
func closestLocalSolarEclipse(
|
||||||
date time.Time,
|
date time.Time,
|
||||||
last LocalSolarEclipseInfo,
|
last LocalSolarEclipseInfo,
|
||||||
@ -308,21 +348,32 @@ func closestLocalSolarEclipse(
|
|||||||
next LocalSolarEclipseInfo,
|
next LocalSolarEclipseInfo,
|
||||||
hasNext bool,
|
hasNext bool,
|
||||||
) LocalSolarEclipseInfo {
|
) LocalSolarEclipseInfo {
|
||||||
|
info, _ := closestLocalSolarEclipseResult(date, last, hasLast, next, hasNext)
|
||||||
|
return info
|
||||||
|
}
|
||||||
|
|
||||||
|
func closestLocalSolarEclipseResult(
|
||||||
|
date time.Time,
|
||||||
|
last LocalSolarEclipseInfo,
|
||||||
|
hasLast bool,
|
||||||
|
next LocalSolarEclipseInfo,
|
||||||
|
hasNext bool,
|
||||||
|
) (LocalSolarEclipseInfo, bool) {
|
||||||
switch {
|
switch {
|
||||||
case hasLast && !hasNext:
|
case hasLast && !hasNext:
|
||||||
return last
|
return last, true
|
||||||
case !hasLast && hasNext:
|
case !hasLast && hasNext:
|
||||||
return next
|
return next, true
|
||||||
case !hasLast && !hasNext:
|
case !hasLast && !hasNext:
|
||||||
return LocalSolarEclipseInfo{}
|
return LocalSolarEclipseInfo{}, false
|
||||||
}
|
}
|
||||||
|
|
||||||
lastDistance := math.Abs(date.Sub(last.GreatestEclipse).Seconds())
|
lastDistance := math.Abs(date.Sub(last.GreatestEclipse).Seconds())
|
||||||
nextDistance := math.Abs(next.GreatestEclipse.Sub(date).Seconds())
|
nextDistance := math.Abs(next.GreatestEclipse.Sub(date).Seconds())
|
||||||
if lastDistance <= nextDistance {
|
if lastDistance <= nextDistance {
|
||||||
return last
|
return last, true
|
||||||
}
|
}
|
||||||
return next
|
return next, true
|
||||||
}
|
}
|
||||||
|
|
||||||
func searchLocalSolarEclipse(
|
func searchLocalSolarEclipse(
|
||||||
@ -350,7 +401,69 @@ func searchLocalSolarEclipse(
|
|||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
candidateTT = basic.CalcMoonSHByJDE(candidateTT+float64(direction)*localSolarEclipseSynodicMonthDays, 0)
|
candidateTT = nextEclipseSearchCandidateTT(candidateTT, 0, direction, localSolarEclipseSynodicMonthDays)
|
||||||
|
}
|
||||||
|
|
||||||
|
return LocalSolarEclipseInfo{}, false
|
||||||
|
}
|
||||||
|
|
||||||
|
func searchLocalTotalSolarEclipse(
|
||||||
|
date time.Time,
|
||||||
|
lon, lat, height float64,
|
||||||
|
direction int,
|
||||||
|
includeCurrent bool,
|
||||||
|
calculator localSolarEclipseCalculator,
|
||||||
|
mode localSolarEclipseQueryMode,
|
||||||
|
) (LocalSolarEclipseInfo, bool) {
|
||||||
|
targetTT := solarEclipseTimeToTTJDE(date)
|
||||||
|
candidateTT := basic.CalcMoonSHByJDE(targetTT, 0)
|
||||||
|
|
||||||
|
for i := 0; i < localSolarEclipseSearchLimit; i++ {
|
||||||
|
if isPotentialLocalSolarEclipse(candidateTT) {
|
||||||
|
globalResult := calculator.global(candidateTT)
|
||||||
|
if globalResult.HasTotal || globalResult.HasHybrid {
|
||||||
|
result := calculator.local(globalResult.GreatestEclipse, lon, lat, height)
|
||||||
|
if result.HasTotal {
|
||||||
|
info := localSolarEclipseInfoFromBasic(result, lon, lat, height, date.Location())
|
||||||
|
if (mode != localSolarEclipseQueryVisible || localCentralSolarEclipseVisible(info)) &&
|
||||||
|
localSolarEclipseMatchesDirection(result.GreatestEclipse, targetTT, direction, includeCurrent) {
|
||||||
|
return info, true
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
candidateTT = nextEclipseSearchCandidateTT(candidateTT, 0, direction, localSolarEclipseSynodicMonthDays)
|
||||||
|
}
|
||||||
|
|
||||||
|
return LocalSolarEclipseInfo{}, false
|
||||||
|
}
|
||||||
|
|
||||||
|
func searchLocalAnnularSolarEclipse(
|
||||||
|
date time.Time,
|
||||||
|
lon, lat, height float64,
|
||||||
|
direction int,
|
||||||
|
includeCurrent bool,
|
||||||
|
calculator localSolarEclipseCalculator,
|
||||||
|
mode localSolarEclipseQueryMode,
|
||||||
|
) (LocalSolarEclipseInfo, bool) {
|
||||||
|
targetTT := solarEclipseTimeToTTJDE(date)
|
||||||
|
candidateTT := basic.CalcMoonSHByJDE(targetTT, 0)
|
||||||
|
|
||||||
|
for i := 0; i < localSolarEclipseSearchLimit; i++ {
|
||||||
|
if isPotentialLocalSolarEclipse(candidateTT) {
|
||||||
|
globalResult := calculator.global(candidateTT)
|
||||||
|
if globalResult.HasAnnular || globalResult.HasHybrid {
|
||||||
|
result := calculator.local(globalResult.GreatestEclipse, lon, lat, height)
|
||||||
|
if result.HasAnnular && !result.HasTotal {
|
||||||
|
info := localSolarEclipseInfoFromBasic(result, lon, lat, height, date.Location())
|
||||||
|
if (mode != localSolarEclipseQueryVisible || localCentralSolarEclipseVisible(info)) &&
|
||||||
|
localSolarEclipseMatchesDirection(result.GreatestEclipse, targetTT, direction, includeCurrent) {
|
||||||
|
return info, true
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
candidateTT = nextEclipseSearchCandidateTT(candidateTT, 0, direction, localSolarEclipseSynodicMonthDays)
|
||||||
}
|
}
|
||||||
|
|
||||||
return LocalSolarEclipseInfo{}, false
|
return LocalSolarEclipseInfo{}, false
|
||||||
@ -501,6 +614,13 @@ func localSolarEclipseVisible(info LocalSolarEclipseInfo) bool {
|
|||||||
return localSolarEclipseVisibleDuring(info, eventStart, eventEnd)
|
return localSolarEclipseVisibleDuring(info, eventStart, eventEnd)
|
||||||
}
|
}
|
||||||
|
|
||||||
|
func localCentralSolarEclipseVisible(info LocalSolarEclipseInfo) bool {
|
||||||
|
if !info.HasCentral || info.CentralStart.IsZero() || info.CentralEnd.IsZero() {
|
||||||
|
return false
|
||||||
|
}
|
||||||
|
return localSolarEclipseVisibleDuring(info, info.CentralStart, info.CentralEnd)
|
||||||
|
}
|
||||||
|
|
||||||
func localSolarEclipseVisibleOnDate(info LocalSolarEclipseInfo, dayStart, dayEnd time.Time) bool {
|
func localSolarEclipseVisibleOnDate(info LocalSolarEclipseInfo, dayStart, dayEnd time.Time) bool {
|
||||||
eventStart, eventEnd, ok := localSolarEclipseRange(info)
|
eventStart, eventEnd, ok := localSolarEclipseRange(info)
|
||||||
if !ok {
|
if !ok {
|
||||||
|
|||||||
@ -129,6 +129,116 @@ func TestLocalSolarEclipseSearchSkipsInvisibleCurrentCandidate(t *testing.T) {
|
|||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
func TestLocalTotalSolarEclipseSearch(t *testing.T) {
|
||||||
|
loc := time.UTC
|
||||||
|
lon, lat, height := -104.1, 25.3, 0.0
|
||||||
|
date := time.Date(2024, 4, 7, 0, 0, 0, 0, loc)
|
||||||
|
|
||||||
|
next, ok := NextLocalTotalSolarEclipse(date, lon, lat, height)
|
||||||
|
if !ok {
|
||||||
|
t.Fatal("expected to find next local total solar eclipse")
|
||||||
|
}
|
||||||
|
if next.Type != SolarEclipseTotal || !next.HasTotal {
|
||||||
|
t.Fatalf("unexpected next total eclipse: %+v", next)
|
||||||
|
}
|
||||||
|
assertSolarTimeClose(t, "NextLocalTotalSolarEclipse", next.GreatestEclipse, time.Date(2024, 4, 8, 18, 17, 15, 0, loc), time.Minute)
|
||||||
|
assertSolarDurationClose(t, "NextLocalTotalSolarEclipse duration", next.CentralEnd.Sub(next.CentralStart), 4*time.Minute+28*time.Second, 5*time.Second)
|
||||||
|
|
||||||
|
last, ok := LastLocalTotalSolarEclipse(next.GreatestEclipse, lon, lat, height)
|
||||||
|
if !ok {
|
||||||
|
t.Fatal("expected to find previous local total solar eclipse")
|
||||||
|
}
|
||||||
|
if last.Type != SolarEclipseTotal || !last.HasTotal {
|
||||||
|
t.Fatalf("unexpected last total eclipse: %+v", last)
|
||||||
|
}
|
||||||
|
assertSolarTimeClose(t, "LastLocalTotalSolarEclipse", last.GreatestEclipse, next.GreatestEclipse, time.Second)
|
||||||
|
assertSolarDurationClose(t, "LastLocalTotalSolarEclipse duration", last.CentralEnd.Sub(last.CentralStart), 4*time.Minute+28*time.Second, 5*time.Second)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLocalTotalSolarEclipseClosest(t *testing.T) {
|
||||||
|
loc := time.UTC
|
||||||
|
lon, lat, height := -104.1, 25.3, 0.0
|
||||||
|
date := time.Date(2024, 4, 8, 12, 0, 0, 0, loc)
|
||||||
|
|
||||||
|
info, ok := ClosestLocalTotalSolarEclipse(date, lon, lat, height)
|
||||||
|
if !ok {
|
||||||
|
t.Fatal("expected to find closest local total solar eclipse")
|
||||||
|
}
|
||||||
|
if info.Type != SolarEclipseTotal || !info.HasTotal {
|
||||||
|
t.Fatalf("unexpected closest total eclipse: %+v", info)
|
||||||
|
}
|
||||||
|
assertSolarTimeClose(t, "ClosestLocalTotalSolarEclipse", info.GreatestEclipse, time.Date(2024, 4, 8, 18, 17, 15, 0, loc), time.Minute)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLocalAnnularSolarEclipseSearch(t *testing.T) {
|
||||||
|
loc := time.UTC
|
||||||
|
lon, lat, height := -114.5, -22.0, 0.0
|
||||||
|
date := time.Date(2024, 10, 1, 0, 0, 0, 0, loc)
|
||||||
|
|
||||||
|
next, ok := NextLocalAnnularSolarEclipse(date, lon, lat, height)
|
||||||
|
if !ok {
|
||||||
|
t.Fatal("expected to find next local annular solar eclipse")
|
||||||
|
}
|
||||||
|
if next.Type != SolarEclipseAnnular || !next.HasAnnular || next.HasTotal {
|
||||||
|
t.Fatalf("unexpected next annular eclipse: %+v", next)
|
||||||
|
}
|
||||||
|
assertSolarTimeClose(t, "NextLocalAnnularSolarEclipse", next.GreatestEclipse, time.Date(2024, 10, 2, 18, 44, 59, 0, loc), time.Minute)
|
||||||
|
assertSolarDurationClose(t, "NextLocalAnnularSolarEclipse duration", next.CentralEnd.Sub(next.CentralStart), 7*time.Minute+25*time.Second, 5*time.Second)
|
||||||
|
|
||||||
|
last, ok := LastLocalAnnularSolarEclipse(next.GreatestEclipse, lon, lat, height)
|
||||||
|
if !ok {
|
||||||
|
t.Fatal("expected to find previous local annular solar eclipse")
|
||||||
|
}
|
||||||
|
if last.Type != SolarEclipseAnnular || !last.HasAnnular || last.HasTotal {
|
||||||
|
t.Fatalf("unexpected last annular eclipse: %+v", last)
|
||||||
|
}
|
||||||
|
assertSolarTimeClose(t, "LastLocalAnnularSolarEclipse", last.GreatestEclipse, next.GreatestEclipse, time.Second)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLocalAnnularSolarEclipseClosest(t *testing.T) {
|
||||||
|
loc := time.UTC
|
||||||
|
lon, lat, height := -114.5, -22.0, 0.0
|
||||||
|
date := time.Date(2024, 10, 2, 12, 0, 0, 0, loc)
|
||||||
|
|
||||||
|
info, ok := ClosestLocalAnnularSolarEclipse(date, lon, lat, height)
|
||||||
|
if !ok {
|
||||||
|
t.Fatal("expected to find closest local annular solar eclipse")
|
||||||
|
}
|
||||||
|
if info.Type != SolarEclipseAnnular || !info.HasAnnular || info.HasTotal {
|
||||||
|
t.Fatalf("unexpected closest annular eclipse: %+v", info)
|
||||||
|
}
|
||||||
|
assertSolarTimeClose(t, "ClosestLocalAnnularSolarEclipse", info.GreatestEclipse, time.Date(2024, 10, 2, 18, 44, 59, 0, loc), time.Minute)
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestLocalCentralSolarEclipseVisibleRequiresCentralPhaseVisibility(t *testing.T) {
|
||||||
|
info := LocalSolarEclipseInfo{
|
||||||
|
Type: SolarEclipseTotal,
|
||||||
|
Longitude: 0,
|
||||||
|
Latitude: 0,
|
||||||
|
PartialStart: time.Date(2024, 1, 1, 9, 0, 0, 0, time.UTC),
|
||||||
|
PartialEnd: time.Date(2024, 1, 1, 15, 0, 0, 0, time.UTC),
|
||||||
|
CentralStart: time.Date(2024, 1, 1, 0, 0, 0, 0, time.UTC),
|
||||||
|
CentralEnd: time.Date(2024, 1, 1, 1, 0, 0, 0, time.UTC),
|
||||||
|
HasPartial: true,
|
||||||
|
HasCentral: true,
|
||||||
|
HasTotal: true,
|
||||||
|
VisibleAtGreatest: false,
|
||||||
|
}
|
||||||
|
if !localSolarEclipseVisible(info) {
|
||||||
|
t.Fatalf("expected partial phase to be visible")
|
||||||
|
}
|
||||||
|
if localCentralSolarEclipseVisible(info) {
|
||||||
|
t.Fatalf("expected central phase below horizon to be rejected")
|
||||||
|
}
|
||||||
|
|
||||||
|
info.Type = SolarEclipseAnnular
|
||||||
|
info.HasTotal = false
|
||||||
|
info.HasAnnular = true
|
||||||
|
if localCentralSolarEclipseVisible(info) {
|
||||||
|
t.Fatalf("expected annular central phase below horizon to be rejected")
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
func TestLocalSolarEclipseInfoKeepsLocation(t *testing.T) {
|
func TestLocalSolarEclipseInfoKeepsLocation(t *testing.T) {
|
||||||
loc := time.FixedZone("UTC+08", 8*3600)
|
loc := time.FixedZone("UTC+08", 8*3600)
|
||||||
lon, lat, height := -104.1, 25.3, 1234.0
|
lon, lat, height := -104.1, 25.3, 1234.0
|
||||||
@ -354,3 +464,14 @@ func assertSameLocalSolarEclipse(t *testing.T, name string, got, want LocalSolar
|
|||||||
}
|
}
|
||||||
assertSolarTimeClose(t, name+".GreatestEclipse", got.GreatestEclipse, want.GreatestEclipse, tolerance)
|
assertSolarTimeClose(t, name+".GreatestEclipse", got.GreatestEclipse, want.GreatestEclipse, tolerance)
|
||||||
}
|
}
|
||||||
|
|
||||||
|
func assertSolarDurationClose(t *testing.T, name string, got, want, tolerance time.Duration) {
|
||||||
|
t.Helper()
|
||||||
|
diff := got - want
|
||||||
|
if diff < 0 {
|
||||||
|
diff = -diff
|
||||||
|
}
|
||||||
|
if diff > tolerance {
|
||||||
|
t.Fatalf("%s mismatch: got %v want %v diff=%v", name, got, want, diff)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|||||||
73
mercury/transit.go
Normal file
73
mercury/transit.go
Normal file
@ -0,0 +1,73 @@
|
|||||||
|
package mercury
|
||||||
|
|
||||||
|
import (
|
||||||
|
"time"
|
||||||
|
|
||||||
|
"b612.me/astro/basic"
|
||||||
|
)
|
||||||
|
|
||||||
|
// TransitInfo 地心水星凌日信息 / geocentric Mercury transit information.
|
||||||
|
//
|
||||||
|
// Start、Greatest、End、InternalStart、InternalEnd 都保持调用者输入的时区。
|
||||||
|
// 内切接触不存在时 InternalStart / InternalEnd 为零值。
|
||||||
|
// Start, Greatest, End, InternalStart, and InternalEnd preserve the caller's timezone.
|
||||||
|
// InternalStart and InternalEnd are zero values when internal contacts do not exist.
|
||||||
|
type TransitInfo struct {
|
||||||
|
Valid bool
|
||||||
|
|
||||||
|
Start time.Time
|
||||||
|
InternalStart time.Time
|
||||||
|
Greatest time.Time
|
||||||
|
InternalEnd time.Time
|
||||||
|
End time.Time
|
||||||
|
|
||||||
|
Duration time.Duration
|
||||||
|
InternalDuration time.Duration
|
||||||
|
|
||||||
|
MinimumSeparationArcsec float64
|
||||||
|
SunSemidiameterArcsec float64
|
||||||
|
PlanetSemidiameterArcsec float64
|
||||||
|
|
||||||
|
HasInternal bool
|
||||||
|
}
|
||||||
|
|
||||||
|
// NextTransit 下一次地心水星凌日 / next geocentric Mercury transit.
|
||||||
|
func NextTransit(date time.Time) TransitInfo {
|
||||||
|
return transitInfoFromBasic(basic.NextMercuryTransit(basic.Date2JDE(date.UTC())), date.Location())
|
||||||
|
}
|
||||||
|
|
||||||
|
// LastTransit 上一次地心水星凌日 / previous geocentric Mercury transit.
|
||||||
|
func LastTransit(date time.Time) TransitInfo {
|
||||||
|
return transitInfoFromBasic(basic.LastMercuryTransit(basic.Date2JDE(date.UTC())), date.Location())
|
||||||
|
}
|
||||||
|
|
||||||
|
// ClosestTransit 最近一次地心水星凌日 / closest geocentric Mercury transit.
|
||||||
|
func ClosestTransit(date time.Time) TransitInfo {
|
||||||
|
return transitInfoFromBasic(basic.ClosestMercuryTransit(basic.Date2JDE(date.UTC())), date.Location())
|
||||||
|
}
|
||||||
|
|
||||||
|
func transitInfoFromBasic(result basic.PlanetTransitResult, loc *time.Location) TransitInfo {
|
||||||
|
if !result.Valid {
|
||||||
|
return TransitInfo{}
|
||||||
|
}
|
||||||
|
start := basic.JDE2DateByZone(result.ExternalIngress, loc, false)
|
||||||
|
greatest := basic.JDE2DateByZone(result.Greatest, loc, false)
|
||||||
|
end := basic.JDE2DateByZone(result.ExternalEgress, loc, false)
|
||||||
|
info := TransitInfo{
|
||||||
|
Valid: true,
|
||||||
|
Start: start,
|
||||||
|
Greatest: greatest,
|
||||||
|
End: end,
|
||||||
|
Duration: end.Sub(start),
|
||||||
|
MinimumSeparationArcsec: result.MinimumSeparationArcsec,
|
||||||
|
SunSemidiameterArcsec: result.SunSemidiameterArcsec,
|
||||||
|
PlanetSemidiameterArcsec: result.PlanetSemidiameterArcsec,
|
||||||
|
HasInternal: result.HasInternal,
|
||||||
|
}
|
||||||
|
if result.HasInternal {
|
||||||
|
info.InternalStart = basic.JDE2DateByZone(result.InternalIngress, loc, false)
|
||||||
|
info.InternalEnd = basic.JDE2DateByZone(result.InternalEgress, loc, false)
|
||||||
|
info.InternalDuration = info.InternalEnd.Sub(info.InternalStart)
|
||||||
|
}
|
||||||
|
return info
|
||||||
|
}
|
||||||
23
mercury/transit_test.go
Normal file
23
mercury/transit_test.go
Normal file
@ -0,0 +1,23 @@
|
|||||||
|
package mercury
|
||||||
|
|
||||||
|
import (
|
||||||
|
"testing"
|
||||||
|
"time"
|
||||||
|
)
|
||||||
|
|
||||||
|
func TestTransitWrappers(t *testing.T) {
|
||||||
|
loc := time.FixedZone("CST", 8*3600)
|
||||||
|
info := NextTransit(time.Date(2019, 1, 1, 0, 0, 0, 0, loc))
|
||||||
|
if !info.Valid {
|
||||||
|
t.Fatal("expected valid transit")
|
||||||
|
}
|
||||||
|
if info.Greatest.Location() != loc {
|
||||||
|
t.Fatalf("timezone mismatch: got %v want %v", info.Greatest.Location(), loc)
|
||||||
|
}
|
||||||
|
if info.Greatest.Year() != 2019 || info.Greatest.Month() != time.November || info.Greatest.Day() != 11 {
|
||||||
|
t.Fatalf("unexpected greatest time: %s", info.Greatest)
|
||||||
|
}
|
||||||
|
if !info.HasInternal || info.Duration <= 0 || info.InternalDuration <= 0 {
|
||||||
|
t.Fatalf("unexpected durations: %+v", info)
|
||||||
|
}
|
||||||
|
}
|
||||||
73
venus/transit.go
Normal file
73
venus/transit.go
Normal file
@ -0,0 +1,73 @@
|
|||||||
|
package venus
|
||||||
|
|
||||||
|
import (
|
||||||
|
"time"
|
||||||
|
|
||||||
|
"b612.me/astro/basic"
|
||||||
|
)
|
||||||
|
|
||||||
|
// TransitInfo 地心金星凌日信息 / geocentric Venus transit information.
|
||||||
|
//
|
||||||
|
// Start、Greatest、End、InternalStart、InternalEnd 都保持调用者输入的时区。
|
||||||
|
// 内切接触不存在时 InternalStart / InternalEnd 为零值。
|
||||||
|
// Start, Greatest, End, InternalStart, and InternalEnd preserve the caller's timezone.
|
||||||
|
// InternalStart and InternalEnd are zero values when internal contacts do not exist.
|
||||||
|
type TransitInfo struct {
|
||||||
|
Valid bool
|
||||||
|
|
||||||
|
Start time.Time
|
||||||
|
InternalStart time.Time
|
||||||
|
Greatest time.Time
|
||||||
|
InternalEnd time.Time
|
||||||
|
End time.Time
|
||||||
|
|
||||||
|
Duration time.Duration
|
||||||
|
InternalDuration time.Duration
|
||||||
|
|
||||||
|
MinimumSeparationArcsec float64
|
||||||
|
SunSemidiameterArcsec float64
|
||||||
|
PlanetSemidiameterArcsec float64
|
||||||
|
|
||||||
|
HasInternal bool
|
||||||
|
}
|
||||||
|
|
||||||
|
// NextTransit 下一次地心金星凌日 / next geocentric Venus transit.
|
||||||
|
func NextTransit(date time.Time) TransitInfo {
|
||||||
|
return transitInfoFromBasic(basic.NextVenusTransit(basic.Date2JDE(date.UTC())), date.Location())
|
||||||
|
}
|
||||||
|
|
||||||
|
// LastTransit 上一次地心金星凌日 / previous geocentric Venus transit.
|
||||||
|
func LastTransit(date time.Time) TransitInfo {
|
||||||
|
return transitInfoFromBasic(basic.LastVenusTransit(basic.Date2JDE(date.UTC())), date.Location())
|
||||||
|
}
|
||||||
|
|
||||||
|
// ClosestTransit 最近一次地心金星凌日 / closest geocentric Venus transit.
|
||||||
|
func ClosestTransit(date time.Time) TransitInfo {
|
||||||
|
return transitInfoFromBasic(basic.ClosestVenusTransit(basic.Date2JDE(date.UTC())), date.Location())
|
||||||
|
}
|
||||||
|
|
||||||
|
func transitInfoFromBasic(result basic.PlanetTransitResult, loc *time.Location) TransitInfo {
|
||||||
|
if !result.Valid {
|
||||||
|
return TransitInfo{}
|
||||||
|
}
|
||||||
|
start := basic.JDE2DateByZone(result.ExternalIngress, loc, false)
|
||||||
|
greatest := basic.JDE2DateByZone(result.Greatest, loc, false)
|
||||||
|
end := basic.JDE2DateByZone(result.ExternalEgress, loc, false)
|
||||||
|
info := TransitInfo{
|
||||||
|
Valid: true,
|
||||||
|
Start: start,
|
||||||
|
Greatest: greatest,
|
||||||
|
End: end,
|
||||||
|
Duration: end.Sub(start),
|
||||||
|
MinimumSeparationArcsec: result.MinimumSeparationArcsec,
|
||||||
|
SunSemidiameterArcsec: result.SunSemidiameterArcsec,
|
||||||
|
PlanetSemidiameterArcsec: result.PlanetSemidiameterArcsec,
|
||||||
|
HasInternal: result.HasInternal,
|
||||||
|
}
|
||||||
|
if result.HasInternal {
|
||||||
|
info.InternalStart = basic.JDE2DateByZone(result.InternalIngress, loc, false)
|
||||||
|
info.InternalEnd = basic.JDE2DateByZone(result.InternalEgress, loc, false)
|
||||||
|
info.InternalDuration = info.InternalEnd.Sub(info.InternalStart)
|
||||||
|
}
|
||||||
|
return info
|
||||||
|
}
|
||||||
23
venus/transit_test.go
Normal file
23
venus/transit_test.go
Normal file
@ -0,0 +1,23 @@
|
|||||||
|
package venus
|
||||||
|
|
||||||
|
import (
|
||||||
|
"testing"
|
||||||
|
"time"
|
||||||
|
)
|
||||||
|
|
||||||
|
func TestTransitWrappers(t *testing.T) {
|
||||||
|
loc := time.FixedZone("CST", 8*3600)
|
||||||
|
info := NextTransit(time.Date(2012, 1, 1, 0, 0, 0, 0, loc))
|
||||||
|
if !info.Valid {
|
||||||
|
t.Fatal("expected valid transit")
|
||||||
|
}
|
||||||
|
if info.Greatest.Location() != loc {
|
||||||
|
t.Fatalf("timezone mismatch: got %v want %v", info.Greatest.Location(), loc)
|
||||||
|
}
|
||||||
|
if info.Greatest.Year() != 2012 || info.Greatest.Month() != time.June || info.Greatest.Day() != 6 {
|
||||||
|
t.Fatalf("unexpected greatest time: %s", info.Greatest)
|
||||||
|
}
|
||||||
|
if !info.HasInternal || info.Duration <= 0 || info.InternalDuration <= 0 {
|
||||||
|
t.Fatalf("unexpected durations: %+v", info)
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
x
Reference in New Issue
Block a user