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    Re: 1901 May, 22 Lunar example by French Navy Captain Arago
    From: Dave Walden
    Date: 2010 Jan 31, 14:22 -0800

    In working through the lunar distance example in Arago, I had the same issue. I found several references which addressed my questions:

    elements de navigation et de calcul nautique precededs de notions d'astronomie

    j.-b. guilhaumon, 1891

    http://books.google.com/books?id=5GJGAAAAYAAJ&dq=intitle%3Anavigation%20inauthor%3Aguilhaumon&lr=&as_drrb_is=q&as_minm_is=0&as_miny_is=&as_maxm_is=0&as_maxy_is=&as_brr=1&pg=PA1#v=onepage&q=&f=false

    ***********************

    termes nautiques

    e. pornain, 1899

    http://books.google.com/books?id=eIpIAAAAYAAJ&dq=intitle%3Atermes%20intitle%3Anautiques&lr=&as_drrb_is=q&as_minm_is=0&as_miny_is=&as_maxm_is=0&as_maxy_is=&as_brr=1&pg=PR3#v=onepage&q=&f=false

    **********************

    Note, there is an apparent typographical error in the "calcul de l'heure de paris par une distance lunaire" example of Arago. the "formules." for both RA and Dec have the second term shown as sin squared. it seem is should be sin of twice the angle. (see for example Chauvenet)

    Other useful references:

    Chauvenet

    Meeus

    Moshier's aa-56 software

    A treatise on practical astronomy, C.L. Doolittle, 1890

    Geocentric parallax in right ascension and declination, A.D. Maxwell, Astronomicla Jour, no. 973, pg 13, 1932

    A direct method of computing the corrections for refraction in right ascension and declination, W.W. Wheelock, astronomical society of the pacific, 1936 pg 169

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