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    Re: Help with Lunar distance.
    From: Paul Jackson
    Date: 2010 May 10, 18:40 -0700
    Thanks for all the all the things you point out here Robin,I am going to stick with sun lunars  and work them through with Bruce Stark's tables for clearing if i get some good results I will post them on Nav list.
    Paul W Jackson.

    --- On Tue, 11/5/10, Robin Stuart <robinstuart@earthlink.net> wrote:

    From: Robin Stuart <robinstuart@earthlink.net>
    Subject: [NavList] Re: Help with Lunar distance.
    To: NavList@fer3.com
    Date: Tuesday, 11 May, 2010, 12:22 PM

    As pointed out by George, the altitudes your program is calculating appear to be way off. Based on your quoted values of
    hc (Moon) = 20�33.9'
    hc (Jupiter) = 22�02.6'
    one can do a double altitude sight calculation and come up with possible
    positions at 9�47.8'S 146�45.8'E or 13�44.3S 77�09.3'W. You can check these values by plugging them and your observation time of 18:15:52 UT into http://aa.usno.navy.mil/cgi-bin/aa_flamenav.pl so it doesn't look like a simple typo in your input position. If the altitudes are wrong then the corrections for refraction, parallax, augmentation will all be off.
    The good news is that your program returns a cleared lunar distance of 7�28.5' and the geocentric distance between the centres of the Moon and Jupiter was indeed that at 2h 57m 42m and again some time between 21h 21m 30s and 45s. The point of closest approach was around 12h12m UT which would have been a particularly bad time to shoot a lunar,
    Robin Stuart
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