To look up the phase of the moon for any date,
just fill out the form below, then hit "Find Phase."
At 16:35:04 UT Monday 04 February 2019
the moon’s phase was
is 16.6011111111111 in decimal hours.
The Julian date was 2458518.5001.
The sun’s ecliptic longitude was 315.568501419486 degrees.
Its mean anomaly was 31.7911223738 degrees.
The moon’s mean longitude was 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.)