239 Adrastea
For the moon of Jupiter, see Adrastea (moon).
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | August 18, 1884 |
| Designations | |
Named after | Adrasteia |
|
A915 TD, 1955 MK1, 1956 UJ | |
| Main belt | |
| Orbital characteristics | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 547.578 Gm (3.66 AU) |
| Perihelion | 343.97 Gm (2.299 AU) |
| 445.774 Gm (2.98 AU) | |
| Eccentricity | 0.228 |
| 1878.771 d (5.14 a) | |
Average orbital speed | 17.25 km/s |
| 146.519° | |
| Inclination | 6.169° |
| 180.904° | |
| 209.06° | |
| Physical characteristics | |
| Dimensions | 41.5 km[1] |
| Mass | unknown |
Mean density | unknown |
| unknown | |
| unknown | |
| 18.4707 hr[1] | |
| Albedo | 0.0777[1] |
| Temperature | unknown |
Spectral type | unknown |
| 10.4[1] | |
|
| |
239 Adrastea is a main belt asteroid. It was discovered by Johann Palisa on August 18, 1884 in Vienna. It is named after the Greek nymph Adrasteia. The asteroid is roughly 42 km in diameter.[1]
References
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