Simplify the following text for a Grade 11 native English-speaking person.
Original: 617 Patroclus ( pÉ - troe ' - klÉ s , ) is a binary minor planet made up of two similarly-sized objects orbiting their common center of gravity .
Simplified: 617 Patroclus is a binary minor planet made up of two similarly-sized objects orbiting their common center of gravity .