288P Asteroid 101

 288P is the first known binary asteroid that is also classified as a main-belt comet.These two asteroids, roughly the same size, orbit each other about 62 miles apart.Most interesting fact is, these two generates an ice tail which makes it a comet.

Artistic representation of the binary asteroids

This was discovered on 15 November 2006, by the Spacewatch survey at Kitt Peak National Observatory near Tucson, Arizona.The possible cometary activity was seen in November 2011 by Pan-STARRS. Both Spacewatch and Pan-STARRS are asteroid survey projects of NASA's Near Earth Object Observations Program. 

A time-lapse video of 288P