Comet Holmes and the Alpha Persei Cluster


December 8, 2007

This image taken with a telephoto lens in early December shows Comet Holmes among a particularly rich field of stars in the constellation Perseus. To the lower right of the comet is the Alpha Persei Cluster (also known as Melotte 20 or Collinder 39), whose brightest member is the star Alpha Persei, or Mirfak.

Date: December 8, 2007
Time: 10:57 p.m. MST
Location: Four Peaks Road, Arizona
Camera: Olympus OM-1 35mm SLR on homemade tracking mount
Film: Kodak Elite Chrome 400 slide (pushed one stop)
Focal length: 100 mm
Aperture: f/2.8
Exposure time: 90 seconds
Scanner: Nikon Coolscan LS-2000 (cropped)

Revised: January 20, 2008
Copyright © 2007 Joe Orman
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