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    Re: The moons of Jupiter for Time or Position?
    From: Francis Upchurch
    Date: 2016 May 6, 05:26 +0100

    I agree with Jackson. Time for a  book Frank. How about something like “Reed’s Wrinkles in Celestial Navigation”? or some such. To find all your gems from the last few years in one published place would be wonderful.

    However, a health warning for crackpots like me. When you mentioned  gyro-stabilized telescopes to try this at sea, did you realise that I now have to find a way to do it! (My wife will definitely say no to this one!)

    Seriously though, does anyone know about gyro telescope mounts? Has anyone tried this?

    One of my fictional naval heroes, Jack Aubrey ,in O’Brien’s books was a keen amateur astronomer/cel  nav. Enthusiast. He experimented with his version of the Irwin Chair, but I do not think they had gyros in those days.

    About 6 years ago I tried to get GMT (land based) from Jupiter’s moons with only limited success (+/- about 1 min time, but  my predicted times were only given in whole minutes, not seconds. I will soon try again.

    I’m also planning to try GMT and longitude of my garden with Mercury Transits on Monday, but the current forecast is for cloud cover.

    Is anyone in sunny climes going to have a go?


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