NGC 7753 and NGC 7752 (aka Arp 86)
Interacting Galaxies

NGC 7753 is a spiral galaxy with a small nucleus and a small bar. NGC 7752 is a close companion that is apparently attached to one of NGC 7753's spiral arms. It was first thought to be an elliptical galaxy, but later images show that it is an irregular and disrupted system with three major H-{alpha} areas. The pair seem to have recently collided and are very similar to the famous M-51 galaxy pair.

This pair is included in Arp’s catalog of unusual galaxies as ARP 86. The system is in Arp's class "spiral galaxies with large high surface brightness companions on arms".

Using the red shift data from the “NASA Extra-galactic Data Base(NED)”, and a Hubble Constant of 62 Km per sec., per Megaparsec, one can calculate a rough distance and size for NGC 7753 as: Distance = 272 million light years; Diameter = 218,000 light years. NGC 7752 has the same red shift, which shows that both galaxies are at nearly the same distance.

NGC 7753 (ARP 86) Magnitude: 12.8 Constellation: Pegasus RA: 23h 47m 04.7s Dec: +29° 29' 02" Epoch 2000 Size (mins): 3.3' x 2.1' Classification: SAB(rs)bc I        Mixed Barred Non-barred Spiral, mixed Inner Ring S-shaped, Luminosity Class I Description in the NGC:        "Considerably faint, considerably large, very little extended, very gradually little brighter middle, resolvable, but mottled."

NGC 7752 (ARP 86) Magnitude: 14.4 Constellation: Pegasus RA: 23h 46m 58.5s Dec: +29° 27' 32" Epoch 2000 Size (mins): 0.8' x 0.5' Classification: IO:        Irregular, Non-Magellanic, type Uncertain Deep Sky Field Guide:     "Double system with NGC 7753, connected."

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George Normandin, KAS

October 13th, 2000