Can several cosmic bodies be in one orbit?

Can. Usually such bodies are found at special points in a system consisting of two massive bodies revolving around a common center of mass – Lagrange points.
Saturn has three satellites in one orbit: Tefia, Telesto and Calypso; orbiting the satellite of Dion – another satellite: 1980 S6. Two groups of minor planets are orbiting Jupiter: a group of asteroids (“Greeks”) moves ahead of Jupiter and several asteroids (“Trojans”) – behind it.

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