239 Adrastea
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| Discovery | |
|---|---|
| Discovered by: | Johann Palisa |
| Discovery date: | August 18, 1884 |
| Alternative names: | A915 TD, 1955 MK1, 1956 UJ |
| Minor planet category: | Main belt |
| Orbital characteristics | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion distance: | 547.578 Gm (3.66 AU) |
| Perihelion distance: | 343.97 Gm (2.299 AU) |
| Semi-major axis: | 445.774 Gm (2.98 AU) |
| Eccentricity: | 0.228 |
| Orbital period: | 1878.771 d (5.14 a) |
| Avg. orbital speed: | 17.25 km/s |
| Mean anomaly: | 146.519° |
| Inclination: | 6.169° |
| Longitude of ascending node: | 180.904° |
| Argument of perihelion: | 209.06° |
| Physical characteristics | |
| Dimensions: | 42.0 km |
| Mass: | unknown |
| Mean density: | unknown |
| Equatorial surface gravity: | unknown |
| Escape velocity: | unknown |
| Rotation period: | unknown |
| Albedo: | unknown |
| Temperature: | unknown |
| Spectral type: | unknown |
| Absolute magnitude: | 10.3 |
239 Adrastea is a typical Main belt asteroid.
It was discovered by Johann Palisa on August 18, 1884 in Vienna.
Adrastea is also a moon of planet Jupiter. Both were named after the Greek goddess Adrasteia.
[edit] References
| Minor planets | ||
|---|---|---|
| Previous minor planet | 239 Adrastea | Next minor planet |
| List of asteroids | ||
Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Comets · Trans-Neptunians (Kuiper belt • Scattered disc • Oort cloud)
For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons and the Solar System.
For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.
