209 Dido
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| Discovery A | |
|---|---|
| Discoverer | C. H. F. Peters |
| Discovery date | October 22, 1879 |
| Alternate designations B |
A909 AB, A909 GB, A912 RB |
| Category | Main belt |
| Orbital elements C | |
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| Eccentricity (e) | 0.064 |
| Semi-major axis (a) | 470.89 Gm (3.148 AU) |
| Perihelion (q) | 440.569 Gm (2.945 AU) |
| Aphelion (Q) | 501.211 Gm (3.35 AU) |
| Orbital period (P) | 2039.771 d (5.58 a) |
| Mean orbital speed | 16.79 km/s |
| Inclination (i) | 7.181° |
| Longitude of the ascending node (Ω) |
0.844° |
| Argument of perihelion (ω) |
250.781° |
| Mean anomaly (M) | 287.741° |
| Physical characteristics D | |
| Dimensions | 160.0 km |
| Mass | unknown |
| Density | unknown |
| Surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | 8 h |
| Spectral class | C |
| Absolute magnitude | 8.24 |
| Albedo (geometric) | 0.035 |
| Mean surface temperature |
unknown |
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 | ||
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| Previous minor planet | 209 Dido | Next minor planet |
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| 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. |
