NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Captain Cook's Sep 07th, 1773 Lunar revisited
From: Paul Hirose
Date: 2012 Jul 20, 22:51 -0700
From: Paul Hirose
Date: 2012 Jul 20, 22:51 -0700
I wrote: > I also solved for time and position: > > 17:07:18.5 S16°45.55' W151°29.80' initial values > 17:05:54.8 S16°30.65' W151°53.78' Hirose solution > 17:06:04.9 S16°22.4' W151°53.8' Couëtte "Second Solution" > > Kermit's solution makes the observed and computed lunar distances > virtually identical. That's good. But the observed Sun altitude is 3.8' > less than the computed value, and the Moon altitude 3.9' less. No matter how carefully I write a message, when it arrives in my in-box I usually see something to criticize. In this case, I did not notice that those altitude intercepts are equal to the dip. That is confirmed in Kermit's reply. He forgot to include height of eye. My solution with the same inputs: 17:06:05.8 S16°22.41' W151°53.96' This is very close (.9 s, .15 NM) to Antoine's "Second Solution". --