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    Pub249 etc
    From: Ron Irwin
    Date: 2007 Sep 9, 17:44 -0700

    On my 55th birthday my wife suggested I look for an
    opportunity to exercise my brain. As we get older
    mental exercise becomes more impotant.  Considering my
    love of sailing, celestial navigation seemed a natural
    quest. With the internet I was able to discover this
    incredible group with members of a caliber and
    knowledge I am humbled to address. Through Schlereth,
    Howell, Bowditch and others i have come to a grasp of
    the process but have a few questions on
    implementation.
    
    My question is in regards to the Polaris tables  in
    Pub 249.
    
    The formula as stated in in tha Almanac  = Ho -1
    degree + a0 +a1 + a2
    
     I understand A0 and A3, and assume A2 is reflecting
    the oblation of the earth. But what is the -1 degree
    about?
    
    The further I get into this the more it fascinates me.
    I especially enjoyed the Shovell  discussions.
    
    Thank you,
    
    Ron Irwin
    
    
    
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