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    Re: Two Mercury Lunars
    From: Modris Fersters
    Date: 2025 Dec 28, 08:02 -0800

    Dear Antoine,

    Thanks for your detailed lunar story. I really enjoyed reading it.

    I see that Paul already published his results in NavList. But they are calculated from your given approximate position (solving for time). Therefore I will add some results from Paul's Lunar4.4 using your exact position 46° 41.2'N;  2°19,9W, because you published your results using this location.

    1) 15.12.2025. Geocentric distance:

    - Lunar4.4: 33°21,97'

    - Antoine's program: 33°22,0'

    Difference: 0,03'

    2) 15.12.2025. Topocentric near limb apparent distance:

    -Lunar 4.4: 32°33,26'

    -Antoine's program: 32°33,18'

    Difference: 0,08'

    3) 16.12.2025. Geocentric distance:

    - Lunar4.4: 23°9,41'

    - Antoine's program: 23°9,4'

    Difference: 0,01'

    4) 16.12.2025. Topocentric near limb apparent distance:

    -Lunar 4.4: 22°23,65'

    -Antoine's program: 22°23,57'

    Difference: 0,08'

    5) Refraction for Mercury:

    -15.12.2025.: 13,81'

    -16.12.2025.: 14,17'

    As you can see the differencies in results between Lunar4.4 and your calculations are smaller than 0,1'. I would say: perfect match under these extreme low Mercury altitudes conditions.

    PS. Effect of center of light for Mercury is taken into consideration.

    Modris F

     

       
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