It's probably a radar image, and it could even be the same radar image (taken from Arecibo) that previously appeared in of those earlier topics linked above. :') @BL, there's probably stuff up already, let's see...
There was also one image search hit that, in thumbnail, looked exactly like the asteroid Gaspra. And, it turned out to be Gaspra. And the caption said "2005 YU55". That's just good editing.