Supernova 1999dg in Lenticular Galaxy UGC 09758

The following is the data on SN 1999dg:

Discovered: July 23rd, 1999, by the Lick Observatory Supernova Search team

• Magnitude 16.5 at discovery
• Type Ia {uncertain}

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

This is the data on Lenticular Galaxy UGC 09758 itself:

• Magnitude: 14.2
• RA: 15h 11m 27.9s
• Dec: +13° 28'44" Epoch 2000
• Size (mins) 1.2' x 1.2'
• Constellation: Serpens
• classification(in UGC): Lenticular Galaxy

Based on the published red shift, a rough distance estimate for UGC 09758 and supernova 1999dg is: 344,000,000 light years, with the galaxy being 120,000 light years in diameter. Considering that the other stars in the image are no more than a few thousand light years at the most, it is possible to see the tremendous amount of energy released by this event.

( UGC = Uppsala General Catalog of Galaxies, 1973, Uppsala Astronomical Observatory)

Click below to

George Normandin, KAS

August 22nd, 1999