As of WikipediA, the Antlia Cluster (or Abell S0636) is a cluster of galaxies located in the Hydra-Centaurus Supercluster. It is the third nearest to our Local Group after the Virgo Cluster and Fornax Cluster.
The Cluster is split into two groups, The Northern subgroup gravitating around NGC 3268, (near the centre on my image) and the Southern subgroup centered on NGC 3258 (at the bottom right of my image).
Here a larger image:
http://www.flickr.com/photos/astro_g...31873/sizes/k/
Taken with my C8 at f/7.5 on my CGEM mount
Camera: QHY8L 21*10min (3.5h)
Guiding with Lodestar and self made OAG
Capture & guiding soft Maxim DL
Processing Soft PixInsigth.
Date: 28/02/2014 at Cajon Del Maipo (~50Km from Santiago de Chile).
Regards
Geert