Comet 2011 KP36 Spacewatch. 7 September, 2015.
Combination of 5, 3 minute images, SBIG STL-1001E CCD.
12" f/10 schmidt-cassegrain with an f/6.3 focal reducer.
Comet 2011 KP36 Spacewatch is a very distant comet, with a perihelion distance of around 3.4AU. It is expected to peak at around magnitude 14 at perihelion during May 2016. When the image below was taken, the comet was around 16th magnitude.