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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Meridian Transit of the Sun and Daily Pages
From: Paul Hirose
Date: 2015 Oct 12, 21:00 -0700
From: Paul Hirose
Date: 2015 Oct 12, 21:00 -0700
On 2015-10-12 18:57, Antoine Couëtte wrote: > Interesting results. BTW, which TT-UT value did you use for your own computations ? 67.980 USNO MICA 67.640 SofaJpl demo program (automatic estimate) 67.644 Tinyac (correct delta T from IERS Bulletin B) ? JPL HORIZONS Since the Sun moves about 1° per day, one second error in delta T causes about 1° / 86400 = .000012° error in GHA.
