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 05:29:53 UT Saturday 23 March 2019
the waning moon’s phase is

93.45% full

Time Zone:   

Some factors that go into this equation:

Universal Time is 5.51472222222221 in decimal hours.
The Julian date is 2458566.43449952.
The sun’s ecliptic longitude is 2.30059792865899 degrees.
Its mean anomaly is 77.6612452114 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

© 1997–2019 by 3IP.