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 19:29:50 UT Thursday 15 February 2018
the moon’s phase was


Time Zone:   

Some factors that go into this equation:

Universal Time is 19.5138888888889 in decimal hours.
The Julian date was 2458164.5001.
The sun’s ecliptic longitude was 327.065940159404 degrees.
Its mean anomaly was 42.9915820344 degrees.
The moon’s true longitude was 2486.3220358786 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.