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Comet ISON (C/2012 S1) continues to brighten, and images of it are starting to roll in. Here’s what this longtime astrophotographer added to his submission: “The comet is very low in our eastern sky, so low in fact that the wall of the observatory has prevented me from getting a clear shot for over a month. Yesterday morning, I was able to obtain this deep image with the reflector.  Everything went right: perfect focus, smooth tracking on the nucleus, and a great composition with a bright star.” (12.5-inch Newtonian reflector at f/5, SBIG ST-10XME CCD camera, five 5-minute exposures stacked, taken September 16, 2013)
Chris Schur