wisest of the centaurs, from Latin Chiron, from Greek Kheiron, of unknown origin; Klein compares Greek kheirourgos "surgeon."
A large cometlike body with an orbit mostly between Saturn and Uranus. Discovered in 1977, Chiron was originally identified as an asteroid, but it has since been reclassified as a Centaur. Like a comet, Chiron has been observed to display a nebulous coma in its closest approach to the Sun, but at approximately 200 km (124 mi) in diameter it is far larger than any other known comet. See more at Centaur.