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 03:34:28 UT Monday 22 October 2018
the waxing moon’s phase is

93.08% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 3.59111111111112 in decimal hours.
The Julian date is 2458414.43082262.
The sun’s ecliptic longitude is 208.708411527871 degrees.
Its mean anomaly is 287.7638469487 degrees.
The moon’s mean longitude is 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

© 1997–2018 by 3IP.