This morning I attempted to image comet C/2009 R1 Mcnaught. The comet was extremely low in the northeast sky just prior to morning twilight - only 10 degrees above my light polluted horizon. The image below is a sum of 22, 60 second exposures through a Takahashi Epsilon 160 astrograph using my Canon 5D mark II.
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The image below was made from 56, 45 second exposures using the same equipment as above - just prior to astronomical twilight with the comet between 15 and 19 degrees above the horizon.