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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: October 15, 1997 09:35 UT

Today is our 100th day of imaging since January! Thanks NASA for marking the occasion with a wonderful Cassini Launch. Conditions Average with scudding clouds, and Titan 4 exhaust clouds (Thank you Cassini!)

1. 25 separate 40 second images of Hale Bopp have been flat fielded and combined to create this image. The image was obtained using a 12 inch Maksutov with 1524mm focal length and no filter. Image is 31.1 by 20.7 arc minutes. This is an integrated white light image. First image started at 05:35 EST with the last image started at 06:15. Stars look trailed in this composite image, since it was effectively guided on the comet's motion. The trails are not continuous, as clouds were constantly interfering with exposures.

2. The image has been processed using an unsharp mask, with mask sigma set to 8.0. The original image has been magnified by a factor 2.

Ian Griffin

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