Comet C/2011 F1 (LINEAR)
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2012 Aug 22
LINEAR, the discoverer of this and many other comets, is the Lincoln Laboratory Near-Earth Asteroid Research project, an Earth-based automated sky survey. The equipment is in New Mexico, where clear skies are far less scarce than they are here in England.
Canon EOS 5D MkII ISO6400 26x64s
254mm Newtonian f=1200mm f/4.8
HEQ5 equatorial mount, driven but not guided
2012 Aug 22 22:41:36-23:12:48 UT
From Rookhope 54.8
The nonuniformity of the star trails in this photo is due to the fact that wispy clouds kept coming and going, so some frames in my sequence turned out to be unuseable.
2012 Aug 20
Canon EOS 5D MkII ISO6400 49x32s
254mm Newtonian f=1200mm f/4.8
HEQ5 equatorial mount, driven but not guided
2012 Aug 20 22:29:18-22:58:11 UT
From Rookhope 54.8