Location of Photo:
Date/Time of photo:
Oct. 31 - Nov. 3, 2007
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
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.