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At 06:30:17 UT Monday 11 December 2017
the waning moon’s phase is
is 6.52138888888889 in decimal hours.
The Julian date is 2458098.9021985.
The sun’s ecliptic longitude is 259.437866690201 degrees.
Its mean anomaly is 337.4052722096 degrees.
The moon’s true longitude is 1620.71779751524 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.)