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Memorable Comets

Comet Holmes

    This is a photographic record of Comet Holmes, which displayed an explosive variation in brightness. At an early stage of the burst, its beautiful rare golden-color was impressive (Photo 1). But gradually, the coma changed to a mystical green (Photo 2). The characteristic feature of this comet was its well-defined outline of the coma like that of a soap bubble. This coma gradually expanded to a size spanning more than 3 degrees and disappeared into space.
    Photo 3 shows clearly the off-centered nucleus in the beautiful light blue coma. This beautiful comet grew fuzzy, infinitely diffused, and slowly faded. I wonder what it will look like when it returns next time.

Photo 1
5 minute-exposure at 20:00, October 29, 2007
60cm f/3.5 reflector, ISO 800 film

Photo 2
5-minute exposure at 02:00, November 11, 2007
60cm f/3.5 reflector, ISO 800 film

Photo 3
5-minute expousre at 23:35, November 17, 2007
60cm f/3.5 reflector, ISO 400 film

All three photos were taken by Tsutomu Seki with the 60cm f/3.5 reflector at Geisei Observatory

Copyright © 2013 Tsutomu Seki.