There are lots of such wrt Jupiter; several moons in the Saturn system (3? 4? more??), and one wrt Neptune. There is also at least one asteroid that is in some kind of odd relationship with one of the stable Earth Lagrange points. Is that it? Are there any good papers showing that the Saturn (and Uranus, and Mars, and ...) equivalent of the Trojans are unstable (in millions of years, or less), due to (for example) Jupiter? What about the Jupiter (and Uranus, and Neptune, and Earth, and ...) equivalent of Telesto/Helene/etc? Should this thread be in Celestial Mechanics??