2 asteroids orbiting each other get classified as comet also
NASA's Hubble Space Telescope has photographed a pair of asteroids orbiting each other that have a tail of dust, which is a comet-like feature. The object is the first known binary asteroid, also classified as a main-belt comet. Discovered in 2006, the hybrid body probably broke into two pieces 5,000 years ago due to a fast rotation, said NASA.