30 lines
901 B
Go
30 lines
901 B
Go
|
package moon
|
||
|
|
|
||
|
|
import (
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"b612.me/astro/basic"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Semidiameter 月亮视半径，单位角秒 / apparent lunar semidiameter in arcseconds.
|
||
|
|
func Semidiameter(date time.Time) float64 {
|
||
|
|
return SemidiameterN(date, -1)
|
||
|
|
}
|
||
|
|
|
||
|
|
// SemidiameterN 月亮视半径（截断版），单位角秒 / truncated apparent lunar semidiameter in arcseconds.
|
||
|
|
func SemidiameterN(date time.Time, n int) float64 {
|
||
|
|
jde := basic.Date2JDE(date.UTC())
|
||
|
|
return basic.MoonSemidiameterN(basic.TD2UT(jde, true), n)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Diameter 月亮视直径，单位角秒 / apparent lunar diameter in arcseconds.
|
||
|
|
func Diameter(date time.Time) float64 {
|
||
|
|
return DiameterN(date, -1)
|
||
|
|
}
|
||
|
|
|
||
|
|
// DiameterN 月亮视直径（截断版），单位角秒 / truncated apparent lunar diameter in arcseconds.
|
||
|
|
func DiameterN(date time.Time, n int) float64 {
|
||
|
|
jde := basic.Date2JDE(date.UTC())
|
||
|
|
return basic.MoonDiameterN(basic.TD2UT(jde, true), n)
|
||
|
|
}
|