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At 21:06:49 UT Monday 21 January 2019
the waning moon’s phase was
is 21.1302777777778 in decimal hours.
The Julian date was 2458505.49332531.
The sun’s ecliptic longitude was 301.543965638803 degrees.
Its mean anomaly was 18.1780660989 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.)