If the orbiting body's mass is a significant fraction of the central body's mass, the weak stability boundaries can be more dramatic. Call the mass of the central body + orbiting body 1. Call the orbiting body's mass µ. Then the central body would have mass 1-µ. Here are pairs arranged in order of µ Pluto/Charon 1.043E-01 Earth/Moon 1.216E-02 Sun/Jupiter 9.545E-04 Sun/Saturn 2.856E-04 Saturn/Titan 2.374E-04 Jupiter/Ganymede 7.789E-05 Jupiter/Callisto 5.684E-05 Sun/Neptune 5.153E-05 Jupiter/Io 4.700E-05 Sun/Uranus 4.366E-05 Jupiter/Europa 2.526E-05 Saturn/Rhea 4.046E-06 Sun/Earth 3.039E-06 Sun/Venus 2.448E-06 Saturn/Dione 1.935E-06 Saturn/Tethys 1.091E-06 Sun/Mars 3.229E-07 Saturn/Enceladus 1.935E-07 Sun/Mercury 1.659E-07 Saturn/Mimas 7.037E-08 Mars/Phobos 1.682E-08 Sun/Pluto& Charon 7.149E-09 Mars/Deimos 2.803E-09 Sun/Ceres 4.741E-10 Jupiter and Saturn have some big moons. You'll find a lot of the gas giant moons near the top of the list when arranged by µ. For more on this see my [mass parameter and ITN](https://hopsblog-hop.blogspot.com/2015/06/mass-parameter-and-itn.html)