To look up the phase of the moon for any date,
just fill out the form below, then hit "Find Phase."
At 17:24:35 UT Friday 20 September 2019
the waning moon’s phase is
is 17.4263888888889 in decimal hours.
The Julian date is 2458747.14356666.
The sun’s ecliptic longitude is 177.45837244305 degrees.
Its mean anomaly is 256.5526126657 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.)