NGC 846, Barred Spiral Galaxy

Barred Spiral Galaxy NGC 846 - Supernova 2003 ja

Barred Spiral Galaxy NGC 846 and Supernova 2003 ja
A 15 minute CCD exposure taken with an ST-9E camera thru Kopernik's 20 inch F/8.1 telescope. Image taken at 3:25 UT on December 28, 2003. The field of view is 9x9 arc minutes with North at the top.

Supernova 2003 ja:

Discovered October 22nd, 2003; Discovered by the Lick Observatory Supernova Search Team.
Magnitude at discovery: 17.1
Type: II
The supernova is magnitude 20.1 in the Kopernik image, taken on December 28, 2003 at 3:25 UT.

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

Barred Spiral Galaxy NGC 846 (aka NGC 847):

NGC 846 is a 13.5 magnitude face-on Barred Spiral Galaxy in the Constellation of Andromeda. This galaxy is also included in the New General Catalog (NGC) as NGC 847.

Based on the published red shift, (and a Hubble Constant of 62 Km/sec per Mpc) a rough distance estimate for NGC 846 and SN 2003 ja is 269 million light years, with a galaxy diameter of about 148,800 light years.

NGC 846
Magnitude: 13.0
Constellation: Andromeda
RA: 02h 12m 12.1s
Dec: +44° 34' 05" Epoch 2000
Size (mins): 1.9' x 1.7'
Classification: SB(rs)ab Barred Spiral, Mixed Inner Ring S-shaped

Click below to

George Normandin, KAS

January 6th, 2004