P4 was first seen in a photo taken with the Hubble Telescope on June 28, and confirmed in subsequent Hubble pictures taken on July 3 and July 18. It has an orbit of 31 days – our own moon has an orbit of 29 days.
NASA’s New Horizons mission is scheduled to fly through the Pluto system in 2015.
The discovery chart has the Sun at 7°Cancer. The Sabian Symbol for this degree speaks of imagination and the play of invisible and mysterious forces – so appropriate for a body under Pluto’s influence.
Reference – http://science.nasa.gov/science-news/science-at-nasa/2011/20jul_p4/