311P/PANSTARRS also known as
P/2013 P5 (PANSTARRS) is an
asteroid (or
main-belt comet) discovered by the
Pan-STARRS telescope on 27 August 2013. Observations made by the
Hubble Space Telescope revealed that it had six comet-like tails. The tails are suspected to be streams of material ejected by the asteroid as a result of a
rubble pile asteroid spinning fast enough to remove material from it.