A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2014 Dec 17, 08:51 -0800
Try extending the existing tables for a few years using the USNO web sight. Correct table 4 part a. so that year 2017 and beyond will match NSNO data. If E and Dec table values are off by more than a minute then a small correction there can be made. Photo copy corrected table and keep with the trig calculator.
From: Samuel L
Date: 2014 Dec 16, 19:05 -0800
HO 249 Volume 1 page 340 has "Table 4- GHA Y for the years 2006 to 2014" which is a very compact way to determining GHA Y (Aries) for stars.
See here (page 339)-
But, that sheet will expire this year. Do you know of the same Table 4 for the coming years?
Or rather....do you know of quick, accurate way to determine GHA Aries?