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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Understanding a 1902 Sumner
From: John D. Howard
Date: 2017 Jan 20, 21:13 -0800
From: John D. Howard
Date: 2017 Jan 20, 21:13 -0800
David,
Sorry if I was oblique with my refrence to EOT but looking at a modern table for March the EOT is negative. Look at the data form - Cor. Eq. T 5 13.3 + A.T. It seems to me that it shows M.T.G. = EOT + A.T. So to get apperent time :
A.T. = M.T.G. - EOT
I get 1312:17.7 * 15 = 198.07375 degrees GHA sun for the first and 1546:06.7 * 15 = 236.56958
Working straight St Hiliarie reductions I get:
Hc = 44.224275 Az = 342 and Hc = 25.078842 Az = 299
Drawing the two LOPs they cross at 41 d 16 m S 174 d 46 m E
I did not use modern data but tried to be true to the old information.
John H.
