57 Mnemosyne
| Discovery | |
|---|---|
| Discovered by | Karl Theodor Robert Luther |
| Discovery date | September 22, 1859 |
| Designations | |
Named after | Mnemosyne |
| Main belt | |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 526.785 Gm (3.521 AU) |
| Perihelion | 415.379 Gm (2.777 AU) |
| 471.082 Gm (3.149 AU) | |
| Eccentricity | 0.118 |
| 2041.056 d (5.59 a) | |
Average orbital speed | 16.73 km/s |
| 68.001° | |
| Inclination | 15.200° |
| 199.337° | |
| 212.848° | |
| Physical characteristics | |
| Dimensions | 113.01 ± 4.46 km[1] |
| Mass | (1.26 ± 0.24) × 1019 kg[1] |
Mean density | 16.62 ± 3.73 g/cm3[1] |
| 0.0315 m/s² | |
| 0.0595 km/s | |
| Albedo | 0.215 [2] |
| Temperature | ~157 K |
Spectral type | S |
| 7.03 | |
57 Mnemosyne (/n[invalid input: 'ɨ']ˈmɒs[invalid input: 'ɨ']niː/ ni-MOS-i-nee) is a large main belt asteroid. It is an S-type asteroid in composition. It was discovered by Robert Luther on September 22, 1859 from Düsseldorf. Its name was chosen by Martin Hoek, director of the Utrecht Observatory, in reference to Mnemosyne, a Titaness in Greek mythology.[3]
References
- ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- ^ Asteroid Data Sets
- ^ Lutz D. Schmadel, Dictionary of Minor Planet Names, p.20.
External links
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