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I can answer the question, re: backyard observations of Polaris: I have
never been able to sight it using a reflective artificial horizon. I have
gone so far as to raise the AH on a camera tripod to get it right up to my
nose but Polaris is dim and the black glass sucks most of what little light
is radiated by this star. Ditto for a pan of oil. I have never tried it with
mercury which, one would think would be like a mirror, however, I doubt if
you would have much more success with that stuff anyway.

It is even difficult to view with a bubble attachment. About the only bubble
sextant that I have had success in using to sight Polaris is the venerable
RAE Mark IX-A. It's illumination system is much more conducive to viewing
dim stars.

Robert

----- Original Message -----
From: "Jim Thompson" 
To: <>
Sent: Monday, April 05, 2004 7:05 AM
Subject: Polaris isn't so easy!



> For the backyard: Does Polaris show up in an artifical horizon (pan of
oil)?
>
> Jim Thompson
> jim2@jimthompson.net
> www.jimthompson.net
> Outgoing mail scanned by Norton Antivirus
> -----------------------------------------
>
>

   

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