src

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declination.go (359B)

      1 package sunrise
      2 
      3 import (
      4 	"math"
      5 )
      6 
      7 // Declination calculates one of the two angles required to locate a point on
      8 // the celestial sphere in the equatorial coordinate system. The ecliptic
      9 // longitude parameter must be in degrees.
     10 func Declination(eclipticLongitude float64) float64 {
     11 	return math.Asin(math.Sin(eclipticLongitude*Degree)*0.39779) / Degree
     12 }