This
Astrobin Debut Object is a galaxy group located 180 million light years away in the constellation of Cetus at a declination of -10 degrees. All 4 spiral galaxies are fairly similar, with a magnitude of 12 to 13 and a diameter of 50,000 to 70,000 light years.
In his
Arp catalog, Dr. Arp classified this object into the category of Groups of Galaxies.
The galaxy designations are provided in the mouseover. All 4 galaxies appear somewhat disturbed, with NGC838 being most disturbed.
I find NGC 835 to be the most interesting structure. An outer ring extends 3/4 of the way around the outer disk – I have never seen that before. In the area where the ring is “missing”, a star stream extends to the left. A star stream bridge seems to connect NGC 833 and NGC 835. Both NGC 833 and NGC 835 are Seyfert galaxies.
This group is also known as Hickson 16. The Hickson catalog is a collection of 100 compact galaxy clusters identified by Paul Hickson in 1982. A typical Hickson cluster has 4 galaxies, as they one has, but can have up to 7.
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