Trojan satellites: Satellites that orbit a body at one or the other Trojan points associative to a secondary body. There are numerous illustrations of this in our own solar system: a collection of asteroids that orbit in the Trojan points of Jupiter; daughter satellites that orbit in the Trojan points of the Saturn-Tethys system, and an extra satellite (Helene) that orbits in the forward Trojan point of Dione and Saturn.