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Griffin Images of Comet Hale-Bopp

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ampo135_s.jpg51K ampo136_s.jpg9K ampo137_s.jpg18K
Observer: Ian Griffin
Location: Astronaut Memorial Planetarium & Observatory, Cocoa, Florida
Date: March 25, 1997 00:23 UT

First image is a 120 second exposure of comet Hale-Bopp. Exposure started at 19:23 EST on 24th March (which is of course 00:23 UT on 25th March ). A 12 inch Maksutov telescope, working at a focal ratio of f5 was used with an SBIG ST8 CCD camera and a blue filter. The CCD was used in medium resolution mode, with 2 by 2 binning, giving a resultant pixel size of 18 microns. The field of view is 0.3 degrees (long axis) by 0.2 degrees (short axis). The image has been processed by subtracting a 20 by 20 median filtered masked version from the original to reveal structure in the coma.

Second image is the original unprocessed image. Third image is a false colour version of the original image.

Ian Griffin
GRIFFIN.I@a1.brevard.cc.fl.us


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