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    Re: Venus mer-pass for Lat, Sun time sight for Lon.
    From: Bill Ritchie
    Date: 2020 Apr 19, 07:52 -0700

    Zdravstvuyte Tony Oz et bonjour Antoine Couëtte,

    For interest, I attach a screenshot (GMap.jpg) of the LOP’s from the 8 averaged sets of sights attached to Antoine’s last post.

    Tony’s GPS position N60°10.3’ E029°48.5’ was by the “Vy” of “Vyborg Rd”.

    My personal ‘visual average’ of these LOP’s (for which I make no attempt to defend) was by the “n” of “Zelenogorsk”, 0.6 nm North West of the GPS position.

    I used an AP of N60°10.0’ E029°50.0’  to position it away from the intersection area. I also assumed that the true centre of Venus was used. With the subject aspects, her centre of light was about 0.1’ lower and her lower limb 0.24’ lower. If Tony, with his superb sextant, had observed her lower limb throughout, my above ‘visual average’ would have moved to the “o” of “Primorsk”, only 0.2nm from the GPS position.

     Keep safe,

     Bill Ritchie. 50N 003W.



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