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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 1, 1997 10:16-10:47 UT

First image is a 300 second exposure of Hale Bopp through a narrow band H20+ emission filter (7000.0 nanometers, 22nm FWHM). The image has been processed by subtracting a 10 by 10 median filtered version of itself from 120% of the original image. This brings out the inner structures beautifully. Note that these shell structures are easy to see with the eye! Exposure started at 05:16:56

Second image is the original unprocessed 300 second exposure of Hale Bopp taken through a narrow band H20+ emission filter (7000.0 nanometers, 22nm FWHM). Exposure started at 05:47:03 EST. The camera head was guided on the motion of the comet, which gives the star trails visible in the picture. Image taken at the prime focus of a 12" Maksutov telescope, using an SBIG ST8 CCD camera, working in medium resolution mode (18 micron pixels)

Third image is a 300 second exposure of Hale Bopp through a 12 inch f5 Maksutov telescope, taken using a Lumicon Swann band filter. Exposure started at 04:58:14EST. Image has had a dark frame subtracted, been flat fielded, and then gamma and contrast scaled. A false colour pallate has then been applied. A false colour version of the 300 second exposure made using a Lumicon Swann Band filter.


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