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Griffin Images of Comet Hale-Bopp


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Observer: Ian Griffin
Location: Astronaut Memorial Planetarium & Observatory, Cocoa, Florida
Date: March 23, 1997 01:00 UT

First image is a 10 second exposure of comet Hale-Bopp. Exposure started at 19:00 EST on 22nd March (which is of course 01:00 UT on 23rd March ). A 12 inch Maksutov telescope, working at a focal ratio of f5 was used with an SBIG ST8 CCD camera and a red 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).

Second image is the original 10 second exposure used to make the top image on this page has been flat fielded and dark subtracted. The image has been processed using Mira. A 20 by 20 median filtered masked image was subtracted from 105% of the original. A false colour pallate was then added.

Ian Griffin

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