121 Hermione (A872 JA)
121 Hermione (A872 JA) (Asteroid). See its size, orbit and live position on a 3D map of the Solar System. 121 Hermione is a very large binary asteroid discovered in 1872.
121 Hermione is a very large binary asteroid discovered in 1872. It orbits in the Cybele group in the far outer asteroid belt. As an asteroid of the dark C spectral type, it is probably composed of carbonaceous materials. In 2002, a small moon was found to be orbiting Hermione.
- Type: Asteroid
- Diameter: 209 km
- Orbital period: 6.4 years
- Eccentricity: 0.124