Ophelia is a moon of which planet in the Solar System
Ophelia (moon) towards Uranus. The ratio of axes of the Ophelia's prolate spheroid is 0.7 ± 0.3. Ophelia acts as the outer shepherd satellite for Uranus' ε ring. The orbit of Ophelia is within the synchronous orbit radius of Uranus, and is therefore slowly decaying due to tidal forces. Explanatory notes Citations Ophelia (moon) Ophelia ( ) is a moon of Uranus. It was discovered from the images taken by "Voyager 2" on January 20, 1986, and was given the temporary designation S/1986 U 8. It was not seen until the Hubble Space Telescope recovered it in 2003. Ophelia was named after
Stability of the Solar System essentially the distance from sun to earth). These are now known as the Kirkwood gaps. Some asteroids were later discovered to orbit in these gaps, but their orbits are unstable and they will eventually break out of the resonance due to close encounters with a major planet. Another common form of resonance in the Solar System is spin–orbit resonance, where the period of spin (the time it takes the planet or moon to rotate once about its axis) has a simple numerical relationship with its orbital period. An example is our own Moon, which is in a 1:1 spin–orbit resonance