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Taken 27-Aug-11
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14 of 20 photos
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Dimensions2200 x 1652
Original file size7.03 MB
Image typeJPEG
Color spaceUncalibrated
Date modified27-Aug-11 12:10
Comet Garradd and Messier 71 (#21)

Comet Garradd and Messier 71 (#21)

Comet Garradd paid a visit to the globular cluster Messier 71 on the night of August 23, 2011. This picture of the pair was taken though a Borg 101ED apo refractor operating at f6.4 by a modified Canon XSi DSLR. Two exposures of 5 minutes each at ISO 1600 were combined in ImagesPlus. The movement of the comet between exposures can be seen in the double image of the nucleus.