Arp 249

  Arp 249 is in the class Appearance of Fission.  The Atlas note says "straight connection from faint material on E to middle galaxy".  My image shows that easily, and also the jet or plume pointing SW from the S galaxy.  These are both easily seen in the Atlas image, but my image (especially the 2x detail) also shows a jet of material exiting the southern nucleus perpendicular to the line of connection that cannot be seen in the Atlas image.  It is, however, easily visible in 48-inch Palomar Schmidt images taken in 1959 and 1994.  I suspect it was just the choice of processing that left it out of the 200-inch Atlas image.

The entire group (two or three galaxies, depending on the cataloger) is cataloged as UGC 12891.  There was some rotation between my 2005 and 2007 images.  I did not crop off all of the misaligned edges because I wanted to leave the KUG 2357+228 galaxy in the field, right at the N edge.  The misalignment shows up more in the negative image.

Atlas Image


  10-inch Newtonian, StarlightXpress MX716, 59 minutes
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