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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Latitude by transits of a circumpolar star both above and below the pole
From: Andr�s Ruiz
Date: 2007 Oct 4, 08:20 +0200
From: Andr�s Ruiz
Date: 2007 Oct 4, 08:20 +0200
-----Mensaje original----- De: NavList@fer3.com [mailto:NavList@fer3.com] En nombre de George Huxtable Enviado el: martes, 02 de octubre de 2007 10:41 Para: NavList@fer3.com Asunto: [NavList 3319] Re: Latitude by transits of a circumpolar star both above and below the pole George Huxtable wrote: -- That sounds very like chapter 6 in "Spherical and Practical Astronomy", by William Chauvenet. Would it perhaps be an early version of that work?=== -> In Celestaire 2007 catalog there is new reprint of "A MANUAL OF SPHERICAL AND PRACTICAL ASTRONOMY" by William Chauvenet. I have the pdf found at google books, but its quality is very poor. I read only some few articles and in spite of the years is a very good book. George, I think it is a good book for my library, isn�t it? -- It's true that it was independent of the declination, so it was useful to astronomers who wanted to precisely find their latitudes in the days when declinations in star catalogues were not necessarily to be relied on. Today, when star declinations are known far more precisely than any of us will ever need, it's of historical interest only. -> Of course, like Lunars, sight Reduction and all the old methods used in navigation -- I don't see how it can be in any way free from refraction errors. -> me too. I think the article says this because at the upper culmination the altitude is high and the refraction small. --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---