NGC 9638, Irregular Galaxy

Irregular Galaxy UGC 9638 - Supernova 2003 dv

Galaxy UGC 9638 and Supernova 2003 dv
Image taken with an ST-9E CCD camera thru Kopernik's 20 inch F/8.1 telescope. A 16 minute exposure taken at 3:40 UT on May 19, 2003. The field of view is 8x8 arc minutes with North at the top.

Supernova 2003 dv:

Discovered April 22nd, 2003, by Mike Schwartz of LOTOSS.
Magnitude at discovery: 16.2
Type: IIn
The supernova is magnitude 16.1 in the Kopernik image, taken on May 19, 2003 at 3:40 UT.
IAUC 8124 informed that the spectrum of this object revealed that it is of type IIn, about a week after explosion. The discovery magnitude of SN 2003dv is near to that of a typical gravitational-collapse event.

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

Spiral Galaxy UGC 9638:

This 15.1 magnitude galaxy is in the constellation of Draco. It is a Magellanic-type Irregular galaxy that is relatively dim and has a low surface brightness.

Based on the published red shift, (and a Hubble Constant of 62 Km/sec per Mpc) a rough distance estimate for UGC 9638 and SN 2003dv is 120 million light years, with a galaxy diameter of about 41,700 light years.

UGC 9638
Magnitude: 15.1
Constellation: Draco
RA: 14h 58m 04.2s
Dec: +58° 52' 04" Epoch 2000
Size (mins): 1.3' x 1.1'
Classification: Im, Magellanic Irregular Galaxy

Click below to

George Normandin, KAS

May 21st, 2003