Hyperion (or S7 Hyperion) is the seventh satellite of Saturn. The
    following properties are from K.R. Lang, 'Astrophysical Data:
    Planets and Stars', p.71:
 
      Distance from planet center:  1481          km
                                      24.6        planet radii
                   Orbital period:    21.28       days
                     Eccentricity:     0.104      degrees
                      Inclination:     0.4        degrees
 
    The rotation of Hyperion is chaotic.