Remus , the second moon , was found over three years later on August 9 , 2004 by Franck Marchis of UC Berkeley , and Pascal Descamps , Daniel Hestroffer , and JÃ rÃ me Berthier of the Observatoire de Paris , France . Remus , the second moon , was discovered over three years later on August 9 , 2004 by Franck Marchis of UC Berkeley , and Pascal Descamps , Daniel Hestroffer , and JÃ rÃ me Berthier of the Observatoire de Paris , France .