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At 12:27:13 UT Tuesday 15 May 2018
the moon’s phase will be
is 12.4702777777778 in decimal hours.
The Julian date will be 2458253.5001.
The sun’s ecliptic longitude will be 54.651281392297 degrees.
Its mean anomaly will be 130.4249252248 degrees.
The moon’s true longitude will be 3654.89143898372 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.)