257 Silesia
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| Discovery A | |
|---|---|
| Discoverer | Johann Palisa |
| Discovery date | April 5, 1886 |
| Alternate designations B |
1929 DD, 1952 FL1, 1952 HU |
| Category | Main belt |
| Orbital elements C | |
|
|
|
| Eccentricity (e) | 0.119 |
| Semi-major axis (a) | 466.195 Gm (3.116 AU) |
| Perihelion (q) | 410.669 Gm (2.745 AU) |
| Aphelion (Q) | 521.721 Gm (3.487 AU) |
| Orbital period (P) | 2009.341 d (5.5 a) |
| Mean orbital speed | 16.87 km/s |
| Inclination (i) | 3.648° |
| Longitude of the ascending node (Ω) |
34.893° |
| Argument of perihelion (ω) |
24.727° |
| Mean anomaly (M) | 2.013° |
| Physical characteristics D | |
| Dimensions | 73.0 km |
| Mass | unknown |
| Density | unknown |
| Surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | unknown |
| Spectral class | unknown |
| Absolute magnitude | 9.47 |
| Albedo (geometric) | unknown |
| Mean surface temperature |
unknown |
257 Silesia is a large Main belt asteroid.
It was discovered by Johann Palisa on April 5, 1886 in Vienna.
It is named after Silesia, a region of the Central Europe.
Little data is available on it.
[edit] References
| Minor planets | ||
|---|---|---|
| Previous minor planet | 257 Silesia | 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.
