Comet Holmes Grows | Stephen Luzader

Photographer
Stephen Luzader
Email
sluzader@frostburg.edu
Location of photo
Frostburg, MD
Date/Time of photo
Oct. 31 - Nov. 3, 2007
Equipment
Oct. 31 and Nov. 3: Orion 80 mm "ShortTube" refractor piggybacked on a Losmandy GM8 mount. Nov. 2: Orion 80 mm ED refractor on an unguided tripod. Images taken with an SBIG STV
Description
The Oct. 31 and Nov. 3 images are stacks of five 5 second STV exposures. The Nov. 2 image is a stack of about forty half second unguided exposures taken over a period of about an hour and rescaled to the same equivalent focal length as the ShortTube images. The comet was 1.62 AU from earth, so the diameter of the coma increased from about 387,000 km to 512,000 km over those four nights.