Trojan Points

Trojan Points: In a gravitational system composed of a small body orbiting a much larger one (such as a planet and star or a moon and planet), there are two stable points lying in the small body's orbit 60 degrees ahead and behind it, and thus equidistant from the small and large bodies. These are called Trojan points (also LaGrangian points, which are abbreviated as L4 and L5).

The Trojan points of a gas giant near an asteroid belt commonly collect a cluster of asteroids. The name comes from the first such cluster discovered by Terrans at Jupiter in the Sol system; the asteroids were named after mythical heros of the Trojan War. -ld IE