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 18:44:28 UT Wednesday 29 March 2017
the waxing moon’s phase is

3.87% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 18.7577777777778 in decimal hours.
The Julian date is 2457841.53868623.
The sun’s ecliptic longitude is 9.27151335897298 degrees.
Its mean anomaly is 84.59643346661 degrees.
The moon’s true longitude is 31.9582292873995 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

© 1997–2017 by 3IP.