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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Long Term Almanac
From: Rod Deyo
Date: 2001 Jul 15, 9:37 PM
From: Rod Deyo
Date: 2001 Jul 15, 9:37 PM
Looking at the web page gives "The main body of the Almanac consists of Ephemerides from which the Greenwich Hour Angle (GHA) of the sun, the declination of the sun and the GHA of Aries may be determined for any time from the year 2000 to 2050" and "Tables for the positions of 39 selected navigational stars, including Polaris, are given for the year 2000. Annual correction factors are also given to account for their subsequent apparent motion, so that their positions may be calculated for any subsequent year." So it looks as if it does the GHA/dec and quadrennial corrections for the sun Sun and GHA Aries with SHA/dec and annual corrections for 39 selected stars, but no planets (and of course no Moon!). Hope this helps. Rod Deyo ----- Original Message ----- From "Lu Abel"To: Sent: Sunday, July 15, 2001 7:37 PM Subject: Re: Long Term Almanac > Dan: > > In viewing the web page, it's not clear whether this almanac just covers > the stars or whether it also covers the sun, moon and planets. Since it > sounds as if you've purchased a copy, could you clarify?? > > Thanx > > Lu > > > At 07:38 AM 7/11/2001 -0700, you wrote: > >I bought a copy of Geoffrey Kolbe's LONG TERM ALMANAC 2000-2050. It is a > >KEEPER! Good instructions and VERY easy to use compared to the other long > >term almanacs. Accuracy is .25' to .6' depending on body and celestial > >conditions. Also included is a consise sight reduction table. And $29.00 for > >U.S. addresses. > > > >See his page http://www.pisces-press.com/almanac.htm > > > > > >Dan Hogan WA6PBY > >C27 "Gacha" > >dhhogan@verimail.com > >Nav-L Page: http://www.wa6pby.com