orbital resonance

Orbital resonance occurs in astronomy when celestial bodies exert a regular, periodic gravitational influence on each other, usually because their orbital periods are related by a ratio of small integers. This phenomenon is most commonly observed in systems with two or more bodies, such as planets and their moons, or asteroids and planets.1

For example, the Trojan asteroids share Jupiter's orbit in a 1:1 resonance, meaning they have the same orbital period. Other asteroids, like those in the Hilda group, are in a 3:2 resonance with Jupiter. These resonances can create stable configurations but can also lead to chaotic orbits if the resonances overlap. The concept of resonance is also applied in chemistry to describe molecular structures.123