| Discovery | |
|---|---|
| Discovered by: | Karl Theodor Robert Luther |
| Discovery date: | March 12, 1871 |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 386.645 Gm (2.585 AU) |
| Perihelion: | 324.208 Gm (2.167 AU) |
| Semi-major axis: | 355.426 Gm (2.376 AU) |
| Eccentricity: | 0.088 |
| Orbital period: | 1337.627 d (3.66 a) |
| Avg. orbital speed: | 19.29 km/s |
| Mean anomaly: | 4.657° |
| Inclination: | 5.037° |
| Longitude of ascending node: | 123.592° |
| Argument of perihelion: | 79.051° |
| Physical characteristics | |
| Dimensions: | 46.1 km |
| Mass: | 1.0×1017 kg |
| Mean density: | ? g/cm³ |
| Equatorial surface gravity: | 0.0129 m/s² |
| Escape velocity: | 0.0244 km/s |
| Rotation period: | ? d |
| Albedo: | ? |
| Temperature: | ~181 K |
| Spectral type: | S |
| Absolute magnitude: | 8.74 |
113 Amalthea is a fairly typical rocky Main belt asteroid orbiting in the inner regions of the belt. It was discovered by R. Luther on March 12, 1871. One of Jupiter's inner small satellites is also called Amalthea. The name comes from Amalthea of Greek mythology. Amalthea is thought to be a fragment from the mantle of a Vesta-sized parent body that broke up around one billion years ago, with the other major remnant being 9 Metis.
| Minor planets (see full list) |
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| Previous minor planet | 113 Amalthea | Next minor planet |
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| Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Neptune Trojans · Comets · Trans-Neptunians (Kuiper belt • Scattered disc objects • Oort cloud) |
| For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons, meteoroids and the Solar System. For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names. |
