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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Backyard winter sextant observatory?
From: Frank Reed
Date: 2005 Apr 19, 19:24 EDT
From: Frank Reed
Date: 2005 Apr 19, 19:24 EDT
Jim you wrote:
"My thought is to put a plexiglass dome in
the roof of a small, lightweight, insulated structure"
There would be significant refraction. The
old air navigation tables had a table for a type of standard dome, but you would
need to measure the correction at various altitudes and it would require
mounting the sextant in a fixed position. At best you might get angles accurate
to the nearest two or three minutes or arc. Maybe you should invest in a good
winter coat and some mittens instead <g>. All kidding aside, I have a
pair of gloves with open fingers that make winter sights bearable.
-FER
http://www.HistoricalAtlas.com/lunars
http://www.HistoricalAtlas.com/lunars
