Spiral Galaxy NGC 4242 - Supernova 2002 bu

Spiral Galaxy NGC 4242 and Supernova 2002 bu
CCD image taken with an ST-9E CCD camera thru Kopernik's 20 inch F/8.1 telescope at 3:00 UT on April 2nd, 2002. This was a 800 second exposure. The field of view is 8x8 arc minutes with North at the top.


Supernova 2002 bu:

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 4242:

NGC 4242 is a very low surface brightness spiral galaxy in the constellation of Canes Venatici. Its face-on disk is covered with H-II regions (star forming locations, see M-42) starting at about magnitude 19. Individual stars are present at magnitude 21 and perhaps brighter. The galaxy has a small nucleus and a weak, diffuse bar, plus several filamentary, very faint spiral arms.

Based on the published red shift, (and a Hubble Constant of 62 Km/sec per Mpc) a rough distance estimate for NGC 4242 and supernova 2002 bu is 27 million light years.



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George Normandin, KAS

April 5th, 2002