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The new moon.

At 12:27:13 UT Tuesday 15 May 2018
the moon’s phase was

NEW

Time Zone:   

Some factors that go into this equation:

Universal Time is 12.4702777777778 in decimal hours.
The Julian date was 2458253.5001.
The sun’s ecliptic longitude was 54.651281392297 degrees.
Its mean anomaly was 130.4249252248 degrees.
The moon’s true longitude was 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.)

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