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Comet 17P/Holmes

Posted by Karsten (Dresden, Germany) on 16 November 2007 in Miscellaneous.

4s exposure of comet 17P/Holmes using a conventional 135mm telephoto lens and a SBIG ST-10XME camera. With an estimated nucleus of 3.4km in diameter, the comet's recent outburst increased it's magnitude about half a million times from approx. 17mag to 2.7mag and produced a coma of about 1 Mio. km in diameter (as an analogy, this equals 70% of the suns diameter; or just compare it to the moon's distance to Earth, which is approx. 378.000km).
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