NGC 382, 383, 386, 387 and UGC 679
Arp 331 Pisces Galaxy Chain - Supernova 2000dk

Supernova 2000dk:

• Discovered: September 18th, 2000, by the Lick Observatory Supernova Search Team.
• Magnitude 16.0 at discovery, and about 17.3 in the Kopernik image.
• Type Ia, discovered at maximum light
• This supernova appears to be in NGC 382. However, since NGC 382 is in close contact with the larger NGC 383, it could be in that galaxy.

Follow this Link to a NASA Web site on supernovas. It has a very nice animation and a description of what these objects are.

NGC 382, the likely site of Supernova 2000dk, is a close companion of NGC 383, and is probably interacting with it. NGC 383 is the brightest in a chain of galaxies known as Arp 331, which is a part of the Perseus-Pisces galaxy super-cluster. The very bright radio source 3C-31 is associated with the galaxy NGC 383, and galaxy exhibits radio jets, a central dust lane, and is surrounded by a hot cloud of gas radiating X-rays.

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 estimate for the NGC 282, 283 galaxy pair, and SN 2000 dk, of about 268 million light years.

NGC 382 Magnitude: 14.2 Constellation: Pisces RA: 01h 07m 24.5s Dec: +32° 24' 13" Epoch 2000 Size (mins): 0.7' Classification: E:        Elliptical, (uncertain)	NGC 383 Magnitude: 13.4 Constellation: Pisces RA: 01h 07m 25.2s Dec: +32° 24' 47" Epoch 2000 Size (mins): 1.6' x 1.4' Classification: SA0:        Lenticular (uncertain) Dreyer description in the NGC:     "Pretty faint, pretty large, round, gradually brighter middle, northeast of double nebula."
NGC 386 Magnitude: 15.0 RA: 01h 07m 30.8s Dec: +32° 21' 44" Epoch 2000 Size (mins): 0.9' x 0.8' Classification: E:        Elliptical, (uncertain)	NGC 387 Magnitude: unknown RA: 01h 07m 30.0s Dec: +32° 23' 00" Epoch 2000 Size (mins): ?? Classification: uncertain       Dreyer description in the NGC:        "Very faint, small, round."
UGC 679 Magnitude: 15.6 RA: 01h 07m 03.7s Dec: +32° 23' 27" Epoch 2000 Size (mins): 1.1' x 0.3' Classification: Spiral Galaxy	Arp 331 Classification: Galaxy Cluster         The Pisces "Galaxy Chain":        A group of Elliptical and Lenticular galaxies including NGC 375, NGC 379, NGC 380, NGC 382, NGC 383, NGC 384, NGC 385, NGC 386, NGC 387, and NGC 388"

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George Normandin, KAS

October 22nd, 2000