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At 11:51:49 UT Tuesday 11 April 2017
the moon’s phase was
is 11.8802777777778 in decimal hours.
The Julian date was 2457855.49937957.
The sun’s ecliptic longitude was 21.79619116976 degrees.
Its mean anomaly was 97.12739952907 degrees.
The moon’s true longitude was 204.650790281339 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.)