Comet 17P/Holmes Development - November-December, 2007

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Comet 17P/Holmes Changes in November-December 2007

This set of images shows the development of Comet 17P/Holmes over a few weeks in November-December 2007 (the full-moon weekend of Nov. 24-25 was skipped).

While the nature of the film media and digital post-processing preclude serious measurements, the expansion of the central dust coma, weakening of the fluorescent gas shell, and disconnection and disappearance of the blue ion tail are apparent.

Date/Time:    11/3, 11/10, 11/17, 12/02/2007 evenings
Location: Vanishing Point Observatory (OCA Anza Site)
Scope: Borg 125EDF2.8 Medium Format Astrograph @ f/3.3
Mount: Losmandy Titan
Guider: SBIG STV / Mini Borg 45ED
Camera: Mitsuboshi 6x9 Vacuum Astrocamera
Media/Film: Kodak Ektachrome E200 (+2 push)
Exposure: 11/03: 1 x 30 min.
11/10: 2 x 30 min.
11/17: 2 x 30 min.
12/20: 4 x 30 min.

Copyright 2007 by David A. Kodama, All Rights Reserved