NGC 7780, Spiral Galaxy

Spiral Galaxy NGC 7780 - Supernova 2001 da

Galaxy NGC 7780 and Supernova 2001da
Click here for a picture of the entire cluster of 6 galaxies that NGC 7780 is a part of.

Supernova 2001 da:

Discovered July 9th, 2001, by the Katzman Automatic Imaging Telescope.

Magnitude 16.5 at discovery
Type: Ia
R. Chornock, M. Modjaz, and A. V. Filippenko, University of California at Berkeley, report: "A spectrum obtained with the Shane 3-m reflector at the Lick Observatory, reveals that SN 2001da is a type-Ia supernova."
The expansion velocity of ejected material is estimated to be 12,000 km/s.
The supernova is magnitude 15.7 in the Kopernik image, taken on July July 21, 2001 at 6:20 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.

Spiral Galaxy NGC 7780:

NGC 7780 in the constellation of Pisces is a part of a cluster of at least six galaxies known as Zwicky 2350.6+0758. The other Galaxies in this cluster include NGC 7778, NGC 7779, NGC 7781, NGC 7782, and MCG 1-60-44. These last two are in the picture shown above. For a large image showing all of the galaxies of this cluster, follow the Link to Zwicky 2350.6+0758.

Based on the published red shift, (and a Hubble Constant of 62 Km/sec per Mpc) a rough distance estimate for NGC 7780 is 271 million light years, with a diameter of about 78,850 light years.

NGC 7780
Magnitude: 14.7
Constellation: Pisces
RA: 23h 53m 28.9s
Dec: +08° 07' 17" Epoch 2000
Size (mins): 0.9' x 0.5'
Classification: Spiral Galaxy

Click below to

George Normandin, KAS

July 26th, 2001