To look up the phase of the moon for any date,
just fill out the form below, then hit "Find Phase."

The full moon.

At 17:50:50 UT Friday 27 July 2018
the moon’s phase will be


Time Zone:   

Some factors that go into this equation:

Universal Time is 17.8638888888889 in decimal hours.
The Julian date will be 2458327.4999038.
The sun’s ecliptic longitude will be 124.63116245824 degrees.
Its mean anomaly will be 202.5986905133 degrees.
The moon’s true longitude will be 4623.50715719475 degrees.

These calculations incorporate the switch to the English New Style (N.S.)—i.e., Gregorian— calendar after Wednesday, 02 September 1752; the next day became Thursday, 14 September, skipping eleven days. (Please also note that, while fairly accurate, these calculations remain a bit buggy.)

 Send comments to

© 1997–2018 by 3IP.