Trojan asteroid
The term originally referred to the Trojan asteroids orbiting around Jupiter's Lagrangian points, which are by convention named after figures from the Trojan War of Greek mythology. By convention, the asteroids orbiting Jupiter's L4 point are named after the heroes from the Greek side of the war, while those at L5 are from the Trojan side. The two exceptions, the Greek-themed 617 Patroclus and the Trojan-themed 624 Hektor, were actually assigned to the wrong sides.