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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 12, 1997 09:35:14 UT

First image is a five minute (300 second) exposure of comet Hale-Bopp. Exposure started at 04:35:14 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.

The second image is the original 300 second exposure used to make the top image on this page. It has been flat fielded and dark subtracted. The third image is a false colour version of the 2nd image.

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