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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).
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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