This image was obtained by an unguided seires of 60 second exposures, registering all frames to the background stars and doing a simple mean combine. The motion of the comet
relative to the background stars is strongly displayed using this technique. The total number of exposures is easily ascertained by just counting the number of "dots" the comet's
nucleus contributed to the image. In this case there were a total of 36 exposures separated by a fixed delay time of 120 seconds between exposures plus camera
download time for a total duration of about 2 hours.

 

 

 

 

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