section_path: Trojan satellites
section_name: Trojan satellites
paragraph_text: Trojan satellites
  
  Two natural satellites are known to have small companions at both their L and L Lagrangian points, sixty degrees ahead and behind the body in its orbit. These companions are called trojan moons, as their orbits are analogous to the trojan asteroids of Jupiter. The trojan moons are Telesto and Calypso, which are the leading and following companions, respectively, of the Saturnian moon Tethys; and Helene and Polydeuces, the leading and following companions of the Saturnian moon Dione.