Hi Pat,

Some comments about what UCAC2 is:

http://ad.usno.navy.mil/ucac/

(The USNO's page on the subject; describes the dataset and how
to get it on three CD-ROMs)

http://www.projectpluto.com/datasets.htm#UCAC2

(My comments on UCAC2: strengths, weaknesses (not many!), why
it's a tremendously wonderful thing for people doing astrometry and
at least an interesting thing for everyone else)

http://www.projectpluto.com/update8.htm#ucac2_display

(Comments on how to get the UCAC2 data to show up in Guide. You
have to go through an extra hoop or two to get it all set up, but
nothing really major...)

http://www.projectpluto.com/charon.htm#ucac2

(Comments on how to use UCAC2 with Charon to get much better
astrometric results than one otherwise would. I've said it before,
but it may bear repeating: if you're doing astrometry, either with
Charon or with something else, you should use UCAC2 as your astrometric
catalog whenever possible.)

-- Bill