It was found along with Hydra in June 2005 by the Hubble Space Telescope Pluto Companion Search Team , composed of Hal A. Weaver , S. Alan Stern , Max J. Mutchler , Andrew J. Steffl , Marc W. Buie , William J. Merline , John R. Spencer , Eliot F. Young , and Leslie A. Young . It was discovered along with Hydra in June 2005 by the Hubble Space Telescope Pluto Companion Search Team , composed of Hal A. Weaver , S. Alan Stern , Max J. Mutchler , Andrew J. Steffl , Marc W. Buie , William J. Merline , John R. Spencer , Eliot F. Young , and Leslie A. Young .