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

The new moon.

At 07:13:20 UT Saturday 25 January 2020
the moon was



Some factors that go into this equation:

Universal Time is 7.23888888888888 in decimal hours.
The Julian date was 2458873.50168743.
The sun’s ecliptic longitude was 304.775905817882 degrees.
Its mean anomaly was 21.3114401584 degrees.
The moon’s mean longitude was 318.351648 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

© 1997–2020 by 3IP.