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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Equinox time?
From: Robert H. van Gent
Date: 2024 Sep 21, 21:32 -0700
From: Robert H. van Gent
Date: 2024 Sep 21, 21:32 -0700
The current IMCCE newsletter
https://www.imcce.fr/newsletter/html/newsletter.html#current-article2
computes the moment when the geocentric centre of the Sun crosses the celestial equator as 12h 44m 12.69s UTC.
The autumnal equinox, defined as the moment when the apparent geocentric longitude of the Sun equals 180 degrees, will occur nearly 32s earlier, at 12h 43m 40.82s.
Rounded to the nearest minute both events occur at 12h 44m.
rvg
