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617 Patroclus : ウィキペディア英語版 | 617 Patroclus
617 Patroclus ( ) is a binary minor planet made up of two objects of similar size orbiting their common centre of gravity. It is a Jupiter trojan. It was discovered in 1906 by August Kopff, and was the second trojan to be discovered. Its binary nature was discovered in 2001; the name Patroclus now refers to the larger of the two components, whereas its slightly smaller companion body has been named Menoetius ( , official designation (617) Patroclus I Menoetius). Recent evidence suggests that the objects are icy like comets, rather than rocky like most asteroids. == Orbit ==
Patroclus orbits in Jupiter's trailing Lagrangian point, ,〔 in an area called the 'Trojan node' after one of the sides in the legendary Trojan War (the other node, at the , is called the 'Greek node'). Patroclus is the only object in the Trojan camp to be named after a Greek character; the naming conventions for the Jupiter trojans were not adopted until after Patroclus was named (similarly, the asteroid Hektor is the only Trojan character to appear in the Greek camp).
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