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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sun sights during an eclipse: "bad limb" calculation
From: David Pike
Date: 2023 Sep 30, 14:18 -0700
From: David Pike
Date: 2023 Sep 30, 14:18 -0700
Frank
Just to prove air navigators don't always 'shoot from the hip' I thought I'd have a crack at the sums bit. I think I'm on the right track except I got the Moon 18' above the Sun, so maybe there's a small mistake to be corrected. I was hoping applying PinA would cure it, but as PinA is always positive, it made things worse. The Air Almanac deciding air navigators weren't allowed the Moon's GHA and dec six hours either side of the elipse time didn't help. I had to do a lot of interpolating. I'm posting anyway. Perhaps some clever chap like Lars or Robin will correct it. I've already spotted that I worked out height of the Moon for 1800 not 1746, but correcting for that only makes matters worse. DaveP
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