出典:Wikipedia
出典:『Wikipedia』 (2011/05/12 14:40 UTC 版)
5145 Pholus ( /ˈfoʊləs/ foh-ləs; from Greek: Φόλος) is a centaur (minor planetoid) of the solar system running in an eccentric orbit, with a perihelion less than Saturn's and aphelion greater than Neptune's. Pholus has not come within one astronomical unit of a planet since 764 BC, and will not again until 5290. It is believed that Pholus originated as a Kuiper belt object.