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    Re: The Improved Suns Table4 from HO249
    From: Herman Dekker
    Date: 2019 Aug 30, 14:26 -0700

    Hello Tony,

    Quick calculation on 31-12-2019 (who is doing celestial on that day??) at 12:00 GMT.
    With diff -8 GHA=359°17' (original value)
    With diff -10 GHA=359°16' (corrected value)
    The USNO website gives for these input GHA 359°17.3'

    Looks that diff -8 is better. I have no idea how I calculated this particular day 3 years ago.
    All the other days diff values are clear.  E value this day minus E value next day
    Ascending + sign, decreasing - sign.

    The same calculation for 1-12-2019 12:00GM
    With diff -6  GHA= 2° 46' (original value)
    With diff -5  GHA= 2° 47' (correct value)
    The USNO website gives for these input GHA 2°46.5'
    So just between or as rounded to whole value 2° 47'
    I keep now your corrected diff -5 value, because it is in line with the other calculations.

    Well it are all minor differences, but we must try to get correct as possible.

    For most of my calculations I use TI-89 Starpilot calculator.
    If I do it longhand I use the SunsTable4 to get GHA and Dec.
    The last Nautical Almanac that I have bought was the 1995 edition.
    It is on the bookshelf as curiosity.

    Kind Regards
    HermanD  52°N 04°E

       
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