617 Patroclus ( \ / pəˈtroʊkləs \ / pə-TROH-kləs ) is a binary minor planet made up of two objects of similar size orbiting their common center of gravity .
617 Patroclus ( pə-troe ' - kləs , how to say : \ / pəˈtroʊkləs \ / ) is a binary minor planet made up of two similarly-sized objects orbiting their common center of gravity .