73 lines
2.5 KiB
Go
73 lines
2.5 KiB
Go
package moon
|
|
|
|
import (
|
|
"time"
|
|
|
|
"b612.me/astro/basic"
|
|
)
|
|
|
|
// ConjunctionPlanet 月球合月目标行星 / target planet for Moon-planet conjunction.
|
|
type ConjunctionPlanet string
|
|
|
|
const (
|
|
ConjunctionMercury ConjunctionPlanet = "mercury"
|
|
ConjunctionVenus ConjunctionPlanet = "venus"
|
|
ConjunctionMars ConjunctionPlanet = "mars"
|
|
ConjunctionJupiter ConjunctionPlanet = "jupiter"
|
|
ConjunctionSaturn ConjunctionPlanet = "saturn"
|
|
ConjunctionUranus ConjunctionPlanet = "uranus"
|
|
ConjunctionNeptune ConjunctionPlanet = "neptune"
|
|
)
|
|
|
|
func conjunctionPlanetToBasic(planet ConjunctionPlanet) basic.MoonPlanetConjunctionPlanet {
|
|
switch planet {
|
|
case ConjunctionMercury:
|
|
return basic.MoonPlanetConjunctionMercury
|
|
case ConjunctionVenus:
|
|
return basic.MoonPlanetConjunctionVenus
|
|
case ConjunctionMars:
|
|
return basic.MoonPlanetConjunctionMars
|
|
case ConjunctionJupiter:
|
|
return basic.MoonPlanetConjunctionJupiter
|
|
case ConjunctionSaturn:
|
|
return basic.MoonPlanetConjunctionSaturn
|
|
case ConjunctionUranus:
|
|
return basic.MoonPlanetConjunctionUranus
|
|
case ConjunctionNeptune:
|
|
return basic.MoonPlanetConjunctionNeptune
|
|
default:
|
|
return 0
|
|
}
|
|
}
|
|
|
|
func validConjunctionPlanet(planet ConjunctionPlanet) bool {
|
|
return conjunctionPlanetToBasic(planet) != 0
|
|
}
|
|
|
|
// LastConjunctionWithPlanet 上一次行星合月（赤经合） / previous Moon-planet conjunction.
|
|
func LastConjunctionWithPlanet(date time.Time, planet ConjunctionPlanet) time.Time {
|
|
if !validConjunctionPlanet(planet) {
|
|
return time.Time{}
|
|
}
|
|
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
|
|
return basic.JDE2DateByZone(basic.LastMoonPlanetConjunction(jde, conjunctionPlanetToBasic(planet)), date.Location(), false)
|
|
}
|
|
|
|
// NextConjunctionWithPlanet 下一次行星合月（赤经合） / next Moon-planet conjunction.
|
|
func NextConjunctionWithPlanet(date time.Time, planet ConjunctionPlanet) time.Time {
|
|
if !validConjunctionPlanet(planet) {
|
|
return time.Time{}
|
|
}
|
|
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
|
|
return basic.JDE2DateByZone(basic.NextMoonPlanetConjunction(jde, conjunctionPlanetToBasic(planet)), date.Location(), false)
|
|
}
|
|
|
|
// ClosestConjunctionWithPlanet 最近一次行星合月（赤经合） / closest Moon-planet conjunction.
|
|
func ClosestConjunctionWithPlanet(date time.Time, planet ConjunctionPlanet) time.Time {
|
|
if !validConjunctionPlanet(planet) {
|
|
return time.Time{}
|
|
}
|
|
jde := basic.TD2UT(basic.Date2JDE(date.UTC()), true)
|
|
return basic.JDE2DateByZone(basic.ClosestMoonPlanetConjunction(jde, conjunctionPlanetToBasic(planet)), date.Location(), false)
|
|
}
|