31 lines
936 B
Go
31 lines
936 B
Go
|
package venus
|
||
|
|
|
||
|
|
import (
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"b612.me/astro/basic"
|
||
|
|
"b612.me/astro/calendar"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Semidiameter 金星视半径，单位角秒 / apparent Venus semidiameter in arcseconds.
|
||
|
|
func Semidiameter(date time.Time) float64 {
|
||
|
|
return SemidiameterN(date, -1)
|
||
|
|
}
|
||
|
|
|
||
|
|
// SemidiameterN 金星视半径（截断版），单位角秒 / truncated apparent Venus semidiameter in arcseconds.
|
||
|
|
func SemidiameterN(date time.Time, n int) float64 {
|
||
|
|
jde := calendar.Date2JDE(date.UTC())
|
||
|
|
return basic.VenusSemidiameterN(basic.TD2UT(jde, true), n)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Diameter 金星视直径，单位角秒 / apparent Venus diameter in arcseconds.
|
||
|
|
func Diameter(date time.Time) float64 {
|
||
|
|
return DiameterN(date, -1)
|
||
|
|
}
|
||
|
|
|
||
|
|
// DiameterN 金星视直径（截断版），单位角秒 / truncated apparent Venus diameter in arcseconds.
|
||
|
|
func DiameterN(date time.Time, n int) float64 {
|
||
|
|
jde := calendar.Date2JDE(date.UTC())
|
||
|
|
return basic.VenusDiameterN(basic.TD2UT(jde, true), n)
|
||
|
|
}
|