209 Dido
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| Discovery | |
|---|---|
| Discovered by: | C. H. F. Peters |
| Discovery date: | October 22, 1879 |
| Alternative names: | A909 AB, A909 GB, A912 RB |
| Minor planet category: | Main belt |
| Orbital characteristics | |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion distance: | 501.211 Gm (3.35 AU) |
| Perihelion distance: | 440.569 Gm (2.945 AU) |
| Semi-major axis: | 470.89 Gm (3.148 AU) |
| Eccentricity: | 0.064 |
| Orbital period: | 2039.771 d (5.58 a) |
| Avg. orbital speed: | 16.79 km/s |
| Mean anomaly: | 287.741° |
| Inclination: | 7.181° |
| Longitude of ascending node: | 0.844° |
| Argument of perihelion: | 250.781° |
| Physical characteristics | |
| Dimensions: | 160.0 km |
| Mass: | unknown |
| Mean density: | unknown |
| Equatorial surface gravity: | unknown |
| Escape velocity: | unknown |
| Rotation period: | 8 h |
| Albedo: | 0.035 |
| Temperature: | unknown |
| Spectral type: | C |
| Absolute magnitude: | 8.24 |
209 Dido is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of privitive 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.
[edit] References
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
| Minor planets | ||
|---|---|---|
| Previous minor planet | 209 Dido | 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.
