(113) Amalthea Main-belt Asteroid
Discovered on 12 March 1871 by R. Luther at Dusseldorf.
Where Amalthea is today
Seen from above the solar system on 2026-10-14: Amalthea is 2.56 au from the Sun and 1.70 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 113 |
| Provisional designation | A871 EA |
| Orbit class | Main-belt Asteroid |
| Diameter | 50.1 km (#747 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.224 |
| Rotation period | 9.95 hours |
| Spectral type | S |
| Absolute magnitude (H) | 8.53 |
| Orbital period | 3.66 years |
| Semi-major axis | 2.38 au |
| Perihelion – aphelion | 2.17 – 2.58 au |
| Eccentricity | 0.0863 |
| Inclination | 5.04° |
| Closest distance between its orbit and Earth's (MOID) | 1.18 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.