57 Mnemosyne
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| Discovery | |
|---|---|
| Discovered by: | Karl Theodor Robert Luther |
| Discovery date: | September 22, 1859 |
| Alternative names: | |
| Minor planet category: | Main belt |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion distance: | 526.785 Gm (3.521 AU) |
| Perihelion distance: | 415.379 Gm (2.777 AU) |
| Semi-major axis: | 471.082 Gm (3.149 AU) |
| Eccentricity: | 0.118 |
| Orbital period: | 2041.056 d (5.59 a) |
| Avg. orbital speed: | 16.73 km/s |
| Mean anomaly: | 68.001° |
| Inclination: | 15.200° |
| Longitude of ascending node: | 199.337° |
| Argument of perihelion: | 212.848° |
| Physical characteristics | |
| Dimensions: | 112.6 km |
| Mass: | 1.5×1018 kg |
| Mean density: | ? g/cm³ |
| Equatorial surface gravity: | 0.0315 m/s² |
| Escape velocity: | 0.0595 km/s |
| Rotation period: | ? d |
| Albedo: | 0.215 [1] |
| Temperature: | ~157 K |
| Spectral type: | S |
| Absolute magnitude: | 7.03 |
57 Mnemosyne (ni-mos'-i-nee) is a large Main belt asteroid. It is a S-type asteroid. It was discovered by R. Luther on September 22, 1859. It is named after Mnemosyne, a Titaness in Greek mythology.
[edit] Aspects
[edit] References
| Minor planets | ||
|---|---|---|
| Previous minor planet | 57 Mnemosyne | 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.
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