To look up the phase of the moon for any date,
just fill out the form below, then hit "Find Phase."
At 02:39:43 UT Sunday 23 July 2017
the moon’s phase was
is 2.6786111111111 in decimal hours.
The Julian date was 2457957.50135489.
The sun’s ecliptic longitude was 120.439165465231 degrees.
Its mean anomaly was 198.27117730255 degrees.
The moon’s true longitude was 116.220235105444 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.)