Trojans

Trojans are asteroids that share an orbit with a planet or a moon. They are found either travelling approximately 60° ahead of the planet or moon, or 60° behind.

The most significant population of trojan asteroids are the Jupiter trojans. More than 6 000 of these have been found so far, but they are thought to be as numerous as the asteroids in the asteroid belt. Multiple trojans have also been found in the orbits of Mars and Neptune.