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    Re: Calculating accurate apparent-angles between stars
    From: George Huxtable
    Date: 2003 Jan 7, 09:08 +0000

    Thanks for Fred Hebard for explaining his remarks about various methods of
    addressing the lunar-distance problem. I'm sorry if I snapped at him, and
    hope he won't be deterred from raising such interesting questions in the
    With Bruce Stark, he has performed a useful service in getting an
    explanation of part of Bruce's lunar-distance methods to this list:
    something that Bruce has kindly explained to me before, in private
    correspondence. I have been most impressed by the ingenuity that has gone
    into constructing Bruce's tables: particularly in the use of Gaussian logs
    to provide a useful short-cut.
    Just as a by-the-way, although Fred said-
    >both methods addressed
    >the problem of clearing an observed lunar distance of the effects of
    >refraction, parallax, semidiameter, augmentation, etc,
    the process of "clearing" a lunar distance, as normally understood,
    excludes corrections for semidiameter. Any necessary corrections to the
    observed distance due to semidiameter are presumed to have been made
    beforehand. The "clearing" process is confined to the effects of parallax
    (including augmentation of the Moon's parallax) and refraction.
    George Huxtable.

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