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 14:13:55 UT Tuesday 19 June 2018
the waxing moon’s phase is

40.65% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 14.2486111111111 in decimal hours.
The Julian date is 2458288.90651201.
The sun’s ecliptic longitude is 88.259862015404 degrees.
Its mean anomaly is 164.9956164295 degrees.
The moon’s true longitude is 4127.48344434849 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.