AstroUtilitiesMoonIllumination Method

Returns the fraction of the Moon's surface that is illuminated

Definition

Namespace: ASCOM.Tools
Assembly: ASCOM.AstrometryTools (in ASCOM.AstrometryTools.dll) Version: 3.0.0-rc.1+86c25ce733aebb4d8b1b8a62e84770ea5e972bea

C#

public static double MoonIllumination(
	double JD
)

VB

Public Shared Function MoonIllumination ( 
	JD As Double
) As Double

Parameters

JD Double: Julian day (UTC) for which the Moon illumination is required

Return Value

Double
Percentage illumination of the Moon

Remarks

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 ephemerides.

Version Information

.NET Standard

Supported in: 2.0