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    Re: Algorithm for star ephemerides?
    From: Geoffrey Kolbe
    Date: 2001 Apr 17, 12:46 AM

    Hello Yves
    
    The "Stormy Weather" navigation program from http://www.stormy.ca uses the
    complete astronomical algorithms (all the bells and whistles) to calculate
    the positions of the stars (and the moon, sun and planets of course.) The
    program also allows you to use the common name or the astronomical name for
    the star of interest. I am sure that there is no more accurate program
    available.
    
    For my almanac "Long Term Almanac 2000-2050" I found the SHA and Dec for my
    chosen star list on the 15th of each month during the year 2000. I then
    used the Stormy Weather program to calculate the SHA and Dec values in 2040
    and so determined Annual Correction factors. The results seem good enough
    to calculate the SHA and Dec of any star on the list to within about 0.3"
    for the next 50 years at least, which is plenty good enough for navigation
    purposes.
    
    Yours aye,
    
    Geoffrey Kolbe.
    
    
    Dr Geoffrey Kolbe, author of "Long Term Almanac 2000-2050" for sun and
    selected stars, with concise sight reduction tables.
    Available online from www.pisces-press.com
    

       
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