These
Astrobin Debut Objects are located in the constellation of Pegasus at a declination of +10 degrees.
In the upper right part of the image is the NGC 7594 small galaxy cluster, located 0.5 billion light years away. This cluster is designated WBL 706 in the Catalog of Nearby Poor Galaxy Clusters. Poor clusters, in contrast to rich clusters such as the Abell clusters, consist of only a few galaxies. At a minimum, a poor cluster has a concentration of 3 or more galaxies with magnitudes brighter than 15.7. In this cluster, there are exactly 3 galaxies brighter than magnitude 15.7, so this is a very poor cluster. NGC 7594 is by far the largest galaxy, a massive one at 200,000 light years in diameter.
The “WBL” designation of poor clusters reflects the names of the 7 paper co-authors. Dr. Richard White is listed as the first author. The next 4 authors names begin with “B”, and the last 2 with “L”. The use of “PGC” for Poor Galaxy Cluster would have been too logical a designation I guess.
At lower left is the graceful NGC 7610 galaxy, located much closer at 150 million light years away. This barred ring galaxy is beautifully colored, with a yellow central region and blue spiral arms. It is about 100,000 light years in diameter. Numerous star clouds can be seen in the arms. The arms have been fragmented, likely by interaction with another galaxy. A fascinating fragment lies some distance below the galaxy. The interaction culprit could be the irregular blue galaxy (NGC 7616) below and to the right, which is about the same distance away as NGC 7610.
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