This image of Comet ISON was taken by Ron Dyvig of Badlands Observatory on the morning of November 7, 2013.  The comet was approximately 7th magnitude at that time.  The image is a sum of 9, 60-second exposures that have been stacked while centering on the nucleus of the comet.  The length of the adjacent star trails indicate the motion of the comet over the approximately 15-minute total time period.

 

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