Phoebe
Phoebe (Natural satellite). See its size, orbit and live position on a 3D map of the Solar System. Phoebe is the most massive irregular satellite of Saturn with a mean diameter of 213 km (132 mi).
Phoebe is the most massive irregular satellite of Saturn with a mean diameter of 213 km (132 mi). It was discovered by William Henry Pickering on 18 March 1899 from photographic plates that had been taken by DeLisle Stewart starting on 16 August 1898 at the Boyden Station of the Carmen Alto Observatory near Arequipa, Peru. It was the first natural satellite to be discovered photographically.
- Type: Natural satellite
- Orbiting: Saturn
- Diameter: 213 km
- Orbital period: 550.3 days