Comet ISON on November 20, 2013 – Last Pre-Perihelion Image

C/2012 S1, 11-20-13. 12×20 sec @ ISO 400 & 27×15 sec @ ISO 800, Canon 200mm F/2.8, modified Canon T3.

Here’s about 10.75 minutes worth of sub-images stacked to show the extent of Comet ISON’s tail.  Mount troubles and twilight limited my exposures, but at least I didn’t scratch.  Probably the last image pre-perihelion, since the weather will not be good for imaging again until next week and ISON will be too low to see by that time.

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