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

The waxing moon.

At 18:08:35 UT Friday 13 July 2018
the waxing moon’s phase will be

0.63% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 18.1597222222222 in decimal hours.
The Julian date will be 2458312.50631.
The sun’s ecliptic longitude will be 111.286816201825 degrees.
Its mean anomaly will be 188.8117769965 degrees.
The moon’s true longitude will be 4440.39899181504 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.