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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 9, 1997 09:43 UT

First image is a 300 second exposure of comet Hale-Bopp. Exposure started at 04:43:18 EST. A 12 inch Maksutov telescope, working at a focal ratio of f5 was used with an SBIG ST8 CCD camera and a Lumicon Swann Band 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 using Mira. A 40 by 40 median filtered masked image was subtracted from 105% of the original. A false colour pallate was then added.

Second image is a 300 second exposure started at 04:43:18 It has been flat fielded and dark subtracted. Exposure made through a lumicon swann band filter. Third image is a false colour version of the original image

Fourth image is a 300 second image of Hale Bopp obtained using a Kodak Aero Ektar lens working at f5. A blue filter was in the optical train. Field of view approximately 3 degrees square


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