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At 17:50:50 UT Saturday 11 August 2018
the moon’s phase will be
is 17.8638888888889 in decimal hours.
The Julian date will be 2458341.50173271.
The sun’s ecliptic longitude will be 138.989036401924 degrees.
Its mean anomaly will be 217.3834008591 degrees.
The moon’s true longitude will be 4823.76031911991 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.)