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    Moon’s SD
    From: Jim Rives
    Date: 2020 Jan 7, 06:02 -0800

    I have read that in arriving at the Moom’s semidameter you multiply the horizontal parallax, HP, by a factor of .2724.  How does this get you the SD? 

    Be kind... I was an accountant so my math sort of peters out around pre-calculus.  

    Thanks. 

    Jim Rives

    43N 71W

       
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