The gravity of Jupiter has a strong effect on the orbits of asteroids, controlling some periods of revolution around the Sun. In particular, if an asteroid takes ⅔ as long as Jupiter to orbit the Sun, Jupiter's gravity will tend to hold it in that orbit. This is an example of resonance. The first asteroid found with this property happened to be named Hilda. Subsequent examples of this effect are known as members of the Hilda orbital family.