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    Re: Celestial navigation: easier basic principle?
    From: Bruce Cutting
    Date: 2020 Jan 26, 20:23 -0700

    I probably am using zenith incorrectly - essentially, what I was think
    about was MAX altitude which os clearly not the same.  Sorry
    Quoting Peter Monta :
    > Hi Bruce,
    > Why is it unlikely that any bright star will be within an arc minute
    >> of zenith?
    > Now I'm thinking that you and/or the original poster may be using "zenith"
    > in the archaic sense of "at culmination".
    > But if we're all talking about the zenith as "up", or "opposite the gravity
    > vector", then at any given place and time the bright stars, of which there
    > are only a few dozen or hundred, will be unlikely to find themselves that
    > close to the zenith.  It's just statistics.  There are about 70 million
    > square arcminutes in the hemisphere, if my arithmetic is right, so for one
    > of the 100 bright stars to be in the magic square at the zenith, it's like
    > winning the lottery.
    > Cheers,
    > Peter
    > View and reply to this message:
    > http://fer3.com/arc/m2.aspx/Celestial-navigation-easier-basic-principle-PeterMonta-jan-2020-g46920

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