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    Frank's Lunar calculator
    From: Alexandre Eremenko
    Date: 2006 May 7, 00:03 -0500


    Frank,

    It seems to me that your Lunar calculator
    contains a little bug.
    Its output is two numbers:
    the error in the Lunar distance and
    the error in longitude.
    Both numbers have signs, plus or minus.
    The bug is that the sign of both numbers
    is always the same:-)
    In reality, the sign of the error in longitude
    is sometimes the same as the sign of the error in distance,
    sometimes the opposite, depending on the limb used.

    If the Moon moves towards a star overshot in the distance
    means underestimate of the time, and vice versa.

    (You wrote once that your error in longitude is simply obtained
    by multiplication of the error in distance by 30.
    But one has to take the sign into account, the sign nedends
    on the limb used).

    Alex



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