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Trojan asteroid refers to asteroids orbiting in the 4th and 5th Lagrange points of major planets in the Solar System. Currently there are six planets known to have trojans: *Venus Trojans (1) *Earth trojans (1) *Mars trojans (7) *Jupiter trojans (6000+) *Uranus trojans (1) *Neptune trojans (13) It is possible Mercury and Saturn have trojan asteroids, but none have been discovered so far due to Mercury's close proximity to the Sun, hindering observations of such objects, and Saturn's proximity to Jupiter, throwing possible would-be trojans out of a stable orbit with Saturn. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Trojan asteroid」の詳細全文を読む スポンサード リンク
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