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    Re: Impressionism began at 7:35 a.m. on Nov. 13, 1872
    From: Greg Rudzinski
    Date: 2015 Apr 15, 11:18 -0700


     Thanks Greg. So was the Hs/Hc correct?

    Your Hs for the Sun's lower limb 49° 5.3' should read 49°51.3' which is I'm sure what you had intended for Hs and is what I get based on USNO data. This puts Venus 5.2' above the lower limb of the Sun at LAN with an azimuth of 000°/360° for both the Sun and Venus.

     But they used sextants for time sights

    Time sights would have been done on Capt. Cook's second voyage with K1. Lunars would have been done on his first voyage which had the mission of observing the transit of Venus from Tahati.

    Greg Rudzinski


    From: Francis Upchurch
    Date: 2015 Apr 14, 23:30 -0700


    re.Cook and Hc/Hs. Yes, I think they did not use these pre-Sumner and St Hilaire, did they? But they used sextants for time sights and to get LAN to corrrect their accurate  astronomical pendulum clocks I think? They also did lots of lunars.

    All good fun anyway. Enjoy your pint! I've already had my "short pint"! Thanks Greg. So was the Hs/Hc correct?




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