Footage of the comet C/2010 X1 (Elenin), filmed by NASA's STEREO B spacecraft from 6 to 12 Aug 2011. As you can see, it appears to be a small comet with a weak tail. The people operating STEREO spacecraft say that it "seems to be much gassier than it is dusty."
http://stereo.gsfc.nasa.gov/
http://sungrazer.nrl.navy.mil/index.php?p=Elenin
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