... P2010 A2: Unusual Asteroid Tail Implies Powerful Collision . ... 3.02.2010 . ... Credit: NASA , ESA , D. Jewitt ( UCLA ) Explanation: What is this strange object? ... At first glance, the object appears to have the tail of a comet . ... Knowing that the object orbits in the asteroid belt between Mars and Jupiter , a preliminary hypothesis that appears to explain all of the known clues is that P/2010 A2 is the debris left over from a recent collision between two small asteroids. ... February 2010 . ...