NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: The 57 Navigational Stars (and Zuben'ubi)
From: Frank Reed
Date: 2005 Apr 20, 23:13 EDT
From: Frank Reed
Date: 2005 Apr 20, 23:13 EDT
Ken you wrote: "The bright star in the Harp, Lyra" Ptolemy would be pleased. :-) And you wrote: " It [the Tables Requisite] gives 60 navigational stars but only 41 are the same as the current 57 navigational stars." Thanks for compiling that list. Yeah, there seems to have been a great deal of variety in lists of stars for navigation up through the middle of the 20th century. Different authors, different tables. Then it all settles down to the modern list of 57. I've pinned things down a bit today. In the American Nautical Almanac for 1950, there is a list of 57 stars which is clearly the predecessor of the modern list. According to 'Bowditch', the list was refined to the modern set in 1953 (but I haven't checked this). By 1958 when the American and British almanacs were combined, the modern list was fixed and hasn't changed since. For what it's worth: SUMMARY of changes in the "57 stars" from 1950-1958: << Caph, Ruchbah, Polaris, Beta Crucis, Mizar, Dschubba dropped. >> Schedar, Ankaa, Menkar, Gienah, Hadar, Zubenelgenubi added. Spelling changes for Mirfak, Betelgeuse, Suhail (formerly Marfak, Betelgeux, Al Suhail) Name changes for Eltanin, Diphda (formerly Etamin, Deneb Kaitos) Names added for Avior, Gacrux, Menkent, Atria. (formerly known by Bayer names, e.g. Epsilon Argus) Large blocks are the same stars before and after (with some name changes): stars 9-28 and stars 42-57. Also, I'm convinced now that the almanac editors did not intend for Zubenelgenubi to be known as "Zuben'ubi" but some students of navigation have ended up calling it that anyway. -FER http://www.HistoricalAtlas.com/lunars