209 Dido
| Discovery | |
|---|---|
| Discovered by | C. H. F. Peters |
| Discovery date | October 22, 1879 |
| Designations | |
|
Named after
|
Dido |
| A909 AB, A909 GB, A912 RB |
|
| Main belt | |
| Adjectives | Didonian |
| Orbital characteristics | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 501.211 Gm (3.35 AU) |
| Perihelion | 440.569 Gm (2.945 AU) |
| 470.89 Gm (3.148 AU) | |
| Eccentricity | 0.064 |
| 2039.771 d (5.58 a) | |
|
Average orbital speed
|
16.79 km/s |
| 287.741° | |
| Inclination | 7.181° |
| 0.844° | |
| 250.781° | |
| Physical characteristics | |
| Dimensions | 140.35 ± 10.12[1] km |
| Mass | (4.59 ± 7.42) × 1018[1] kg |
| 5.7366[2] h | |
| Albedo | 0.035 |
|
Spectral type
|
C |
| 8.24 | |
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209 Dido is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous materials. Like many asteroids of its type, it has an extremely low albedo.
It was discovered by C. H. F. Peters on October 22, 1879 in Clinton, New York and was named after the mythical Carthaginian queen Dido.
Photometric observations at the Palmer Divide Observatory during 2005 showed a rotation period of 5.7366 ± 0.0005 hours with a brightness variation of 0.17 ± 0.02 in magnitude.[2]
References
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<references />, or <references group="..." />External links
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
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