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    Re: About Lunars, part 3
    From: Chuck Griffiths
    Date: 2002 Feb 15, 16:44 -0500

    While I was waiting for the Moon to reappear in the evening sky to play around
    with lunar distances I've been measuring interstellar distances (as is often put
    forward as a method to check one's sextant for accuracy) for practice. This has
    raised a couple of questions in my mind. First, the easiest way to deal with
    refraction when measuring interstellar distances is to use two stars at equal
    altitudes and not correct for refraction, would this be such a special case when
    measuring lunar distances that we should forget this as a possibility? Second,
    does choosing good moon star or moon planet combinations require that we give
    some thought to the location of the other body relative to the path of the moon?
    I'm thinking that the optimum second body would be exactly in the path of the
    moon's track though the sky. I also imagine that if the second body chosen were
    "abeam" the moon as it passed, the measured lunar distance would change less
    with time than if the second body were more or less ahead or behind the moon's
    position but in it's path.
    Chuck Griffiths
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