54598 Bienor (provisional designation 2000 QC243) is a centaur orbiting the Sun between Saturn and Uranus in the outer Solar System. Named after the mythological centaur Bienor, it was discovered on 27 August 2000 by the Deep Ecliptic Survey at Cerro Tololo Inter-American Observatory in Chile. Bienor has a highly elongated shape that spans up to...