public static double ApparentEclipticLongitude(double julianDate, bool highPrecision)
{
var longitude = ConvertLongitudeToFK5(julianDate, highPrecision)
+ CoordinateTransformation.SetDMSToDegrees(0, 0, Nutation.NutationInLongitude(julianDate));
var radius = Earth.GetSunRadiusVector(julianDate);
return((highPrecision)
? longitude - (0.005775518 * radius * CoordinateTransformation.SetDMSToDegrees(0, 0, GetVariationEclipticLongitude(julianDate)))
: longitude - CoordinateTransformation.SetDMSToDegrees(0, 0, 20.4898 / radius));
}