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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 7, 1997 10:17:36 UT

First image is a five minute (300 second) exposure of comet Hale-Bopp. Exposure started at 05:17:36 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 30 by 30 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 05:17:36 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 2nd image.


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