To look up the phase of the moon for any date,
just fill out the form below, then hit "Find Phase."
At 08:22:02 UT Wednesday 31 January 2018
the moon’s phase will be
is 8.3838888888889 in decimal hours.
The Julian date will be 2458150.49933633.
The sun’s ecliptic longitude will be 311.40992351856 degrees.
Its mean anomaly will be 27.7497777271 degrees.
The moon’s true longitude will be 2288.45748237512 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.)