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    Re: Lunar4.4. vs Frank's online calculator
    From: Antoine Couëtte
    Date: 2023 May 1, 03:37 -0700

    Paul, you indicated :

    "Refraction also decreases Moon semidiameter, about

    0.00010° in this case. Lunar 4.4 applies that correction."

    Just for fun ... I wanted to check own results on that one.

    Even though own "absolute results" are off by about 3", "relative results" should still show at least 2 if not 3 significant figures.

    Here I found that the difference between No-Ref MSD and Ref MSD is equal to 0.00376', or 0.0000627° which is consistent with your own determination of about 0.0001°

    Antoine

       
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