Hello Chris,

Guide use PK2 catalogue to show Planetary Nebulae.
"Abell 21" is shown by "PK 205.1+14.2".
PK2 cataloue has no magnitude data for "Abell 21"
even "20" is 16.3 mag, and "22" is 15.4 mag.

You need to switch "ON" to show all Abell objects.

Sincerely,
Masaki Kouda, Japan

>Guide 8 won't show this particular planetary even though it is
>relatively large and bright. I also tried the PK # no show. In both
>instances Guide goes to the right spot but nothing shows up. Abell 20
>and 22 which are fainter do show up.
>
>What is the latest general Guide 8 release?
>
>Chris. Spratt
>Victoria, BC
>