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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Time of full moon
From: Fred Hebard
Date: 2019 Dec 12, 14:07 -0500
From: Fred Hebard
Date: 2019 Dec 12, 14:07 -0500
The fullest of the full moon was meant to occur last night on December 12 at 12:12 am, eastern standard time. It was billed as the 12-12-12-12 moon! As best I can tell, it occurred at 11:57:25 pm EST, or 04:57:25 UT on December 12. That was when the GHA of the Sun was 180 degrees separate from the Moon’s GHA, by linear interpolation of values in the Nautical Almanac. I remember, however, that similar calculations of when the Sun crossed the equator at the Equinoxes were more complicated than simply determining when it’s declination was exactly zero. Are there any similar caveats to the above calculation? Thanks, Fred Fred Hebard mbiew@comcast.net
