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Thanks for all that work!

John Karl's book has some more pairs than Bauer (12 I think, upto 113 degrees), with a refraction table for each, but no aberration tables.

For just one pair so far (I really need a tripod!), I went the long way and got aberration-corrected Right Ascension and Declination from Solex 10.2. I then used Frank Reed's calculations here:

http://www.fer3.com/arc/m2.aspx?i=015098&y=200404

Using Frank's distance formula on Regulus-Betelgeuse, 62 deg 26.6' in Karl, without refraction, I got 62 deg 26.94' from both the Solex data and the US Naval Observatory data. I then used the Bennett refraction formula as modified by George Huxtable and used Frank's refraction distance correction. I was quite happy to be within 0.2 minutes that time, but it's only one shot.

Richard Reed

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