Home > Solar System > Comet P17/Holmes Nov 6
Object Comet P17/Holmes Nov 6

The comet was discovered by Edwin Holmes on November 6, 1892 while he was conducting regular observations of the Andromeda Galaxy (M31). Its discovery in 1892 was made because of and during magnitude changes similar to the 2007 outburst. 17P/Holmes brightened to an approximate magnitude of 4 or 5 before fading from visibility over a period of several weeks.

Between October 23 – 24, 2007, the comet grew much brighter, going from magnitude 17 to magnitude 2.5 in just a few hours, while in the constellation Perseus. The first reported person to notice anything happening with 17P/Holmes was J. A. Henrquez Santana on the island of Tenerife in the Canary Islands; minutes later Ram’n Naves in Barcelona noticed the comet at magnitude 7.3. It became easily visible to the naked eye as a bright yellow “star” in Perseus. 17P/Holmes appeared as the third brightest “star” in Perseus by October 25.

Scope Zenithstar 80 ED
Camera Canon 40D
Mount Losmandy G11
Guiding ST2000xcm
Exposure Info 2 hours total exposure time(40x3min). ISO 800
Date November 6, 2007
Copyright Photo copyright Thomas Kerns, Beluga Lake Observatory