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    Re: Lunars: how to use the prop.log tables?
    From: Robin Stuart
    Date: 2016 Sep 1, 10:20 -0700

    Tony,

          The problem is that the raw lunar distances in the Almanac have been rounded to the nearest 0.1' so when you subtract two of them your answer could be off from the true value by something approaching 0.1'. I would expect that the proportional logarithms given in the Almanac are produced by first subtracting the lunar distances carrying all the figures along and then computing the proportional logarithm. It is therefore more accurate to use that value in the calculation,

    Regards,

    Robin Stuart

       
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