b612
044f2f4381
- 新增半解析、旧模型、自定义与多源堆叠星历实例，提供 Context、Instance、SPK 读取及状态与视位置计算 - 统一太阳、月球和行星实例接口，扩展黄经穿越、留、相位、最近角距、偕日可见、任意高度升落、轨道节点及凌日等天象查询 - 完善日月食、月掩与凌日的月缘剖面、有限盘面接触、站心修正、局地可见性、全球路径和地图输出 - 新增 SVG、GeoJSON、KML 天象输出及凌日、月掩和月缘地形相关缓存与几何求解 - 新增恒星星表导入与查询，支持 CSV、Hipparcos、BSC5、Stellarium 等格式及名称、交叉标识、锥面检索和星等过滤 - 补充 IAU 2006、地球定向、折射消光、大气观测、轨道传播及半解析行星/月球数据支持 - 将默认未来民用时标切换为 TimeScaleLeapHour，更新 2027–2400 农历速查表、中文日期解析和时区边界处理 - 增加事件基线、跨模型回归、几何边界、月缘地形和输出契约测试，完善中英文手册、示例资源、NOTICE 与忽略规则
76 lines
2.8 KiB
Go
76 lines
2.8 KiB
Go
package jupiter
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import (
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"time"
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"b612.me/astro/basic"
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)
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// GalileanSatellitePosition 木星伽利略卫星视位置 / apparent position of a Galilean satellite.
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//
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// Jovicentric* 为木心 J2000 平赤道直角坐标与速度，单位 AU / AU-day。
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// ApparentRA/Dec 为该卫星的地心天体测量赤经赤纬，单位度。
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// OffsetX/OffsetY 以木星中心为原点，分别沿天球东、北方向为正。
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// Jovicentric* are Jovicentric J2000 mean-equatorial coordinates and velocities in AU / AU-day.
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// ApparentRA/Dec are geocentric astrometric right ascension and declination in degrees.
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// OffsetX/OffsetY are measured from Jupiter's center, positive to celestial east and north.
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type GalileanSatellitePosition struct {
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JovicentricX float64
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JovicentricY float64
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JovicentricZ float64
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JovicentricVX float64
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JovicentricVY float64
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JovicentricVZ float64
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ApparentRA float64
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ApparentDec float64
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EarthDistance float64
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OffsetXArcsec float64
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OffsetYArcsec float64
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OffsetXJupiterR float64
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OffsetYJupiterR float64
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OffsetZJupiterR float64
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InFrontOfJupiter bool
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}
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// GalileanSatellitesInfo 四颗伽利略卫星视位置 / apparent positions of the four Galilean satellites.
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type GalileanSatellitesInfo struct {
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Io GalileanSatellitePosition
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Europa GalileanSatellitePosition
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Ganymede GalileanSatellitePosition
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Callisto GalileanSatellitePosition
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}
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// Satellites 木星四颗伽利略卫星视位置 / apparent positions of Jupiter's four Galilean satellites.
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func (module *Jupiter) Satellites(date time.Time) GalileanSatellitesInfo {
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jde := basic.UTC2TT(basic.Date2JD(date.UTC()))
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observations := basic.JupiterGalileanSatelliteObservationsWithInstance(jde, module.inst)
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return GalileanSatellitesInfo{
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Io: galileanSatellitePositionFromBasic(observations[0]),
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Europa: galileanSatellitePositionFromBasic(observations[1]),
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Ganymede: galileanSatellitePositionFromBasic(observations[2]),
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Callisto: galileanSatellitePositionFromBasic(observations[3]),
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}
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}
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func galileanSatellitePositionFromBasic(observation basic.JupiterGalileanObservation) GalileanSatellitePosition {
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return GalileanSatellitePosition{
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JovicentricX: observation.State.X,
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JovicentricY: observation.State.Y,
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JovicentricZ: observation.State.Z,
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JovicentricVX: observation.State.VX,
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JovicentricVY: observation.State.VY,
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JovicentricVZ: observation.State.VZ,
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ApparentRA: observation.RA,
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ApparentDec: observation.Dec,
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EarthDistance: observation.Distance,
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OffsetXArcsec: observation.OffsetXArcsec,
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OffsetYArcsec: observation.OffsetYArcsec,
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OffsetXJupiterR: observation.OffsetXJupiterRadii,
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OffsetYJupiterR: observation.OffsetYJupiterRadii,
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OffsetZJupiterR: observation.OffsetZJupiterRadii,
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InFrontOfJupiter: observation.InFrontOfJupiter,
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}
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}
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