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Well, the old C+P I got might be an OK instrument!  I took two sights
tonight, of Jupiter & Sirius and Ho-Hc for three replications of each
was 0.042896+/-0.308899, and -0.07455+/-0.212369, where the error
figure is the square root of the mean of (Ho-Hc) squared; since Hc is a
parametric mean, the degrees of freedom should equal the number of
replications.  I've never gotten so close previously, although the
standard deviations leave a bit to be desired.  Ten to thirty more
shots and I might get a fair idea of how good this sextant is.

I was driving west and north for a few hundred miles this evening and
the new moon was hanging about 15-20 degrees underneath Venus.  It was
perfectly clear and still and would have been a beautiful lunar, easy
to shoot.   Of course when I got home, the low western sky had clouded
over.

I have a fair amount of data for my Husun now, which I may get a chance
to share with the list.  It appears to need about 25 seconds of arc
added to the existing corrections, although there's some additional
periodicity in the errors which I don't know how to handle, having
never fit such data.  I still need to get a chance to fool around a bit
with the data first.  It would help also if I broke down and got the
Husun's horizon mirror resilvered.

   

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