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Re: Star - Star Observations
From: Brad Morris
Date: 2010 Mar 11, 09:45 -0500
From: Brad Morris
Date: 2010 Mar 11, 09:45 -0500
George, you wrote:
” From 40º53'N, on 10 March 2010, at 0hrs 57 min GMT, I get the predicted
altitude of both stars to be a few minutes less than 32º. Not anything like
the values given by Brad, of Sirius 28.63501º, Alphard 37.8021º. One of us
is doing something wrong. Is it Brad, or is it me?"
Ouch! The USNO will provide a Celestial Navigation Table based upon user inputs. You would
think I would have checked my answers against this source prior to posting.
In providing the USNO with my coordinates and GMT, Alphard's altitude will be 31d 51.6m
while Sirius' altitude will be 31d 56.8m. I believe that confirms yours suspicion that one of us
is doing something wrong. That would be me. I believe I have some more work to do.
In light of the Skyscout inaccuracy, it appears as if I need to recast the problem anyway.
Best Regards
Brad
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