Moon's Illuminated Fraction

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Category: Advanced Indicator Set 1

 

Input parameters

Name

Setting

Date Variable

Date

 

Calculations

The Moons Illuminated Fraction indicator is a plot of the fraction of the Moons disk illuminated by the Sun each day. The indicator output ranges from zero to one. Example: the Moons Illuminated Fraction of .23 means that .23 of the Moons disk area is illuminated by the Sun. Zero corresponds to a New Moon; 0.5 is a First or Last Quarter, and 1.0 is a Full Moon.

The Moons Illuminated Fraction is calculated for 0:00 GMT (Greenwich Mean Time midnight).

 

References

1. Meeus, Jean, "Astronomical Formulae for Calculators", 4th edition, 1988, published by: Willmann-Bell, Inc., P.O. Box 35025, Richmond, Virginia 23235, U.S.A.

2. Meeus, Jean, "Astronomical Algorithms", 2nd edition, 1998, published by: Willmann-Bell, Inc., P.O. Box 35025, Richmond, Virginia 23235, U.S.A.