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

The waning moon.

At 16:51:41 EDT* Sunday 25 September 2135
the moon’s phase will be

WANING GIBBOUS (89.03% full)


*20:51:41 Universal Time

Some factors that go into this equation:

Universal Time (UT) will be 20:51:41, Sunday, 09/25/2135.
(That’s 20.8780555555556 in decimal hours.)
The Julian date will be 2501120.39027397.
The sun’s ecliptic longitude will be 16382.4039416936 degrees.
Its mean anomaly will be 16461.5298000904 degrees.
The moon’s mean longitude will be 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.