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    Re: Equinox, eggs and other questions
    From: Brian Whatcott
    Date: 2002 Mar 16, 21:15 -0600

    At 10:05 AM 3/16/02, you wrote:
    >I always assumed the equinox was when the sun crossed the equator, but
    >since taking a Cel Nav class I realize my naivete, and now assume that
    >it must be more complicated than that ;) For instance, is it when the
    >center of the sun crosses, or the lower limb, or what? A quick glance
    >through my Nautical Almanac didn't reveal an answer.
    >
    >I figure the equinox will be between 19-00 and 20-00 UT (about 19-30 it
    >looks like) since that's when the sun's declination hits zero. If I just
    >fiddle with the increment tables to get a 0 deg dec, that's the equinox?
    >
    >Oh, eggs. In Iran the new year begins on the equinox (helluv practical,
    >those ancient Persians). Tradition has it that at the moment of the
    >equinox you can stand an egg on end. Not to raise the specter of
    >scientific rationalism vs. folklore, but big bets are riding on this in
    >my office. Video evidence is being demanded. So an accurate time for the
    >equinox is essential.
    >
    >And Happy New Year to all the Iranians out there!!
    >
    >Rob
    
    Without getting too precise about the equinoctial moment, I can confide
    to Rob that yes, one can indeed stand an egg on end at that moment - or as it
    happens, at any other moment - it just takes a little preparation.
    
    
    
    
    Brian Whatcott
       Altus OK                      Eureka!
    
    
    

       
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