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    Re: Index Error
    From: Marc Bernstein
    Date: 2004 May 5, 08:47 -0400
    According to the 2004 nautical almanac the semi-diameter of the sun varies between 16.3' at perihelion to 15.8' at aphelion. Or the diameter varies between 31.6' and 32.6', for a difference of 1.0' or 2 X 0.5'
     
    Could this be the source of the error?
       
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