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    Re: Lunars using Bennett
    From: Peter Fogg
    Date: 2008 Jul 4, 13:16 +1000
    On one issue George raises:
     
    Interpolation.
    In my 2003 edition of the tables, Bennett states clearly "do not attempt to
    interpolate the tables", but then, he was not anticipating their use for
    calculating lunars. In his paper on obtaining lunar distances, in the Spring
    2003 issue of Navigator's Newsletter, he is a bit more ambiguous about
    interpolation, saying about the tables in his book - "They are intended for
    sight reduction without any interpolation (95% of errors of solution do not
    exceed one minute of arc). However, if interpolayed, 95% of errors do not
    exceed a few tenths of a minute of arc which may be acceptable." I expect
    that Dave Walden has been careful to avoid any interpolation in his
    automated procedure, but it would be useful to have that confirmed. If other
    Bennett tables, computed with more decimal places, are to be tested in
    future, presumably they will always require some interpolation.
     
    Firstly; yes, for their original purpose interpolation was not recommended.  However, the 6-figure tables, designed for lunar use, come with methodology for interpolation. 


     

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