A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Lars Bergman
Date: 2020 May 4, 02:43 -0700
David C wrote: "Presumably there is a formula for h l t but I have not found it". That formula does not exist, as the spherical triangle is not uniquely determined. You could try with e.g. altitude=53°, latitude=12°, hour angle=37°; and use different values of declination. With declination=6° you get azimuth=96°; with declination=10° you get azimuth=89.3°.