If you still have the A2 catalog selected under the Toggle Datasets, then it
will first default to that. Go to that tab and turn A2 "OFF"; if you have
UCAC-3 installed you will also need to turn that OFF as well. However, remember
that UCAC-4 covers stars only to mag. 16.5 or so, so you will definitely have
considerably less stars showing than with A2.

We use both catalogs (now UCAC-4 and A2) which are displayed simultaneously so
that fainter stars can be identified; however stars in the A2 catalog should
never be used for photometric nor astrometric comparisons since there are a
number of errors in that catalog.

Dr. Clay
_____
Arkansas Sky Observatories
MPC H45 - Petit Jean Mountain South
MPC H41 - Petit Jean Mountain
MPC H43 - Conway West
http://www.arksky.org/

----- Original Message -----
From: "tom" <loeblt@...>
To: <guide-user@yahoogroups.com>
Sent: Monday, October 08, 2012 9:11 AM
Subject: [guide-user] UCAC3 and 4


> Hi,
>
> If I right-click on a star, Guide9 identifies the USNO star as
> "A2_XXXX_xxxxxxx so I know these stars are from the USNO-A2 catalog. Can
> someone explain to me which stars are from the UCAC3/4 catalog?
>
> Tom
>
>
>
> ------------------------------------
>
> To unsubscribe from this group, send an empty email to:
> guide-user-unsubscribe@egroups.comYahoo! Groups Links
>
>
>
>