co-orbital satellite

A co-orbital satellite is a celestial body that shares an orbit with a larger astronomical body. This phenomenon is most notably observed with moons around planets. For instance, Saturn's moons Janus and Epimetheus share the same average orbit, periodically exchanging positions. Similarly, some of Saturn's moons, like Telesto and Calypso, are located at stable Lagrangian points along the orbit of a larger moon, Tethys, much like the Trojan asteroids in Jupiter's orbit. These co-orbital arrangements are a result of gravitational interactions and orbital resonances.12