UPDATE: Here's its wikipedia page. 100 light years way from earth, so there is no way it's a photo. Also, wikipedia calls it a brown dwarf, which would explain the temperature:
http://en.wikipedia.org/wiki/CFBDSIR2149-0403
The source of the image, an European Southern Observatory press release (mentioned in the HBL article, linked in the Wikipedia article) gives it a title of "Artist’s impression of the free-floating planet CFBDSIR J214947.2-040308.9".
http://upload.wikimedia.org/wikipedia/commons/f/fc/Ceres_opt...
UPDATE: Here's its wikipedia page. 100 light years way from earth, so there is no way it's a photo. Also, wikipedia calls it a brown dwarf, which would explain the temperature: http://en.wikipedia.org/wiki/CFBDSIR2149-0403