Returns the fraction of the Moon's surface that is illuminatedNamespace: ASCOM.Astrometry.AstroUtils
Assembly: ASCOM.Astrometry (in ASCOM.Astrometry.dll) Version: 126.96.36.199 (188.8.131.5219)
- Type: System..::..Double
Julian day (UTC) for which the Moon illumination is required
Return ValuePercentage illumination of the Moon
The algorithm used is that given in Astronomical Algorithms (Second Edition, Corrected to August 2009) Chapter 48 p345 by Jean Meeus (Willmann-Bell 1991). The Sun and Moon positions are calculated by high precision NOVAS 3.1 library using JPL DE 421 ephemeredes.