Kevin Cooper Jun 20, 2003
>Bill et al--
>a question has arisen about how Guide calculates
>PA, it appears to measure counter-clockwise, but
>it has been suggested (to me) PA is more frequently
>measured clockwise! but I also see that eg the
>double star catalogues (that I looked at) in Guide
>match the Guide calculation, so
>1) which is preferred?
>2) did Guide (Bill :) ever modify a star catalogue
>so PA matched Guide output, or I rather assume that
>that Bill worked it out so Guide PA matches the
>catalogues. do double star catalogues use different
>methods?
>thanks!
>
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