NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: 3-Star Fix - "Canned Survival Problem"
From: Greg R_
Date: 2008 Jun 13, 16:30 -0700
From: Greg R_
Date: 2008 Jun 13, 16:30 -0700
Aha - I was looking at your plot in a little more detail, and you just gave me a clue as to why my rough plot is off by a few miles. We agree on the assumed longitudes for Spica and Pollux (119�22.9'W and 119�39.1'W respectively, though looks like you rounded the minutes instead of trying to deal with the tenths). Just took a look at my notes, and saw that I had changed the assumed longitude for Vega from 119�06.8'W (which agrees with yours) to 119�25.7'W, but can't find a reason for it yet (I'll have to work backwards through the calculations because I worked them on a sheet of paper vs. a sight reduction form - students, label your work... ;-)). Might have something to do with changing from 249 vol. 1 to vol. 2, but seems like LHA Vega (and the resulting AP longitude) should have stayed the same for either method. We sure do get spoiled easily by having calculators/computers to do all this messy grunge work for us... ;-) -- GregR --- d waldenwrote: > First by Naut Alm concise, and then HO249. (was really too late for > the last star in 249, so had to assume a postion several degrees away > to get it, but it seemed to work out.) > > > > > > --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---