Re: [guide-user] PA

Kevin Cooper Jun 20, 2003

Paul,

Guide measures PA from north through east which is the normal way. It
defaults to display the sky with north at the top and east on the left,
the way the sky appears looking up, thus PA is anticlockwise on the screen.

Kevin Cooper.

paul wrote:

>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!
>
>
>
>To unsubscribe from this group, send an empty email to:
>guide-user-unsubscribe@egroups.com
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>

--
This e-mail and any attachments have been scanned for viruses by Norton AntiVirus 2003 prior to sending.