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    Re: Celestial Navigation Data from USNO--alternative
    From: Bill Ritchie
    Date: 2019 Nov 25, 10:46 +0000
    Astron can also provide a similar Nautical Almanac listing. The attached screenshot is for the same location and time. 

    All results agree within 0.1'. Andres quotes Hc to 2 places and, if Astron settings changed to do this (not shown),
    all Hc agree within 0.01' except for Moon. 

    Astron gives the Moon Hc as -04° 51.79'. Andres as -04º 51.88'.. Frank's Lunars Calculator, tweaked to extract the
    extra decimal place, gives -04° 51.84' , midway between the two!

    Bill Ritchie
    50N 003W

    On Sun, Nov 24, 2019 at 3:48 PM Dave Walden <NoReply_Walden@fer3.com> wrote:

    Andres Ruiz' Navigational Algorithms program can produce a very nice version of the USNO table of  Celestial Navigation Data.  Go to Nautical Almanac/Identification of Stars and Planets/Hc, Zn.  The below table is produced (with better spacing):

    [24/11/2037 14:00:00]

    39º 00.0' N 077º 00.0' W

    Body GHA Dec Zn Hc

    Sun 33º 18.4' -20º 40.8' 137.3 17º 39.97'

    Moon 192º  5.8' 20º 47.4' 301.8 -04º 51.88'

    Mercury 10º 40.4' -25º 29.3' 124.2 00º 37.33'

    Venus 347º 33.2' -26º  4.6' 111.1 -15º 39.49'

    Mars 220º 56.1' 20º  4.9' 323.4 -21º 57.48'

    Jupiter 151º 59.0' 20º 27.5' 277.5 24º 07.12'

    Saturn 106º 42.2'   7º 23.1' 228.0 48º 37.11'

    Acamar 228º 56.5' -40º  9.4' 258.0 -68º 25.97'

    Achernar 249º  5.2' -57º  3.0' 193.5 -71º 13.19'

    Acrux 86º 41.7' -63º 18.1' 184.4 -12º 35.66'

    Adhara 168º 50.3' -29º  1.4' 247.6 -19º 05.69'

    Al_Na'ir 301º 13.5' -46º 46.8' 118.3 -57º 08.23'

    Aldebaran204º 20.6' 16º 34.9' 307.6 -15º 47.76'

    Alioth 79º 57.6' 55º 45.2' 354.3 73º 07.83'

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