P2010 A2: Unusual Asteroid Tail Implies Powerful Collision . ... 3.02.2010 . ... Credit Copyright: NASA , ESA , D. Jewitt ( UCLA ) Explanation: What is this strange object? First discovered on ground based LINEAR images on January 6, the object appeared unusual enough to investigate further with the Hubble Space Telescope last week. ... At first glance, the object appears to have the tail of a comet . ... Pressure from sunlight would then spread out the debris into a trailing tail. ...