Anthony Ayiomamitis wrote:
Thank you for the GREAT references below.

You're welcome. Also to use individual Abell identifiers in the Simbad
database at -

http://simbad.u-strasbg.fr/sim-fid.pl

- enter the Abell number in either the 1955 or 1966 catalogues in the
format "PN Ann nn", e.g. -

To find Enter

NGC 6742 PN A55 39
PN G144.3-15.5 PN A66 4

Enjoy - Canopus56