 It was imaged, along with Pluto and its four other moons, by the "New Horizons" spacecraft in July 2015.The first image of Kerberos from the flyby was released to the public on 22 October 2015.Kerberos was discovered by researchers of the Pluto Companion Search Team using the Hubble Space Telescope on 28 June 2011, using the Wide Field Camera 3, during an attempt to find any rings that Pluto might possess.