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Uploaded 28-Nov-07
Taken 28-Nov-07
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Dimensions1561 x 1033
Original file size1 MB
Image typeJPEG
Comet Holmes

Comet Holmes

After observing comet Holmes naked eye for the past month I finally obtained this shot. Unfortunately a bright 13-day-old Moon was also present. The bright star in the frame is Mirfak.

17P/Holmes – November 22, 2007
Constellation: Perseus
Location: DAO, old 16” site.
Optics: Borg 77EDII at f/4.3
Camera: Canon 20Da on Kenko SkyMemo.
Exposures: 51 RAW light frames of 30 sec, ISO 400.
Process: Calibrated with 20 dark frames and 20 flat frames in ImagesPlus. Combined using MinMax Excluded. Colour balance in Photoshop.