NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: venus
From: Herbert Prinz
Date: 2004 Oct 16, 21:11 -0400
From: Herbert Prinz
Date: 2004 Oct 16, 21:11 -0400
Oops, George, your formula is right. What a comedy of errors. I am sorry for sending you on a wild goose chase. Your formula didn't seem to square with one I had which gives topocentric zenith distance form geocentric: tan zeta' = (sin zeta / (cos zeta - R/D)) R = Earth radius, D = distance of object. But the formulas ARE equivalent. I made the same error twice when working mine into the shape of yours. Frank, thanks for checking. Maybe you overlooked that George works with altitudes? Herbert Prinz