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From: Alexandre E Eremenko (no email)
Date: Sun Apr 30 2006 - 20:17:12 EDT
Bill,
> To satisfy my curiosity, what was you IC
> with traditional sun and stars IE checks vs. your current IC using star
> pairs.
Stars, traditional, -0.2 (most of the time)
Sun traditional, vertical or horizontal -0.3
Orion belt, about 2d 40' apart -0.6
Castor-Pollux -0.7
All other star-to star distances from 18d to 104d become almost perfect if
one
uses IC= -0.8
This indicates that the arc is non-uniform on the interval from 0 to 4d,
and it is OK after that.
I would be satisfied with this conclusion if not the Freiberger
(and Cassens/Plath) tests that say that the arc is good everywhere.
As you know, I experienced the problem BOTH before and after
Freiberger/CP tests.
The only thing that remains to finally solve the question
is to lend the sextant to some really experienced guy with
good eyes who would
care to make star-to-star tests to confirm my observations:-)
But of course, it is a scandal if both Freiberger and CP tests
are so bad...
Alex.
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