Spiral Galaxy NGC 673 - Supernova 2001 fa

Galaxy NGC 673 and Supernova 2001 fa
Image taken with an ST-9E CCD camera thru Kopernik's 20 inch F/8.1 telescope at 2:25 UT on December 12, 2001. The field of view is 8x8 arc minutes with South at the top.


Supernova 2001 fa:

Discovered October 18th, 2001, by LOTOSS. (Lick Obs).

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 673:

NGC 673 is a 13th magnitude spiral galaxy in the constellation of Aries. It has an asymmetric shape, a short bar, and two main spiral arms. One arm crosses the disk and terminates at right angle to the edge. There is an anonymous companion galaxy and the two are possibly gravitationally bound, but not interacting.

Based on the published red shift, (and a Hubble Constant of 62 Km/sec per Mpc) a rough distance estimate for NGC 673 and supernova 2001 fa is 272 million light years, with a galaxy diameter of about 166,400 light years.



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George Normandin, KAS

December 12th, 2001