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    Re: Backyard winter sextant observatory?
    From: Ken Muldrew
    Date: 2005 Apr 19, 16:18 -0600

    On 19 Apr 2005 at 18:53, Jim Thompson wrote:
    
    > Oops, sorry, Ken, forgot the :) right back?  
    
    No worries, I laughed out loud when I read your reply.
    
    I can sympathize as well. We had a pretty warm winter this year but I did
    manage to shoot one lunar at -30?C. The lunar went OK (but I got a touch
    of frost-nip on my face from the eyepiece) but while taking a time sight
    afterward the water in my artificial horizon froze before I could get a
    single altitude (Aldebaran, I think). I replaced it and took a lunar
    altitude but again I only got 3 sights in before ice was forming. I would
    guess the old land navigators had a similar problem with mercury.
    
    Ken Muldrew.
    
    
    

       
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