57 Mnemosyne

57 Mnemosyne
Discovery
Discovered by Karl Theodor Robert Luther
Discovery date September 22, 1859
Designations
MPC designation (57) Mnemosyne
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)
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 (/nᵻˈmɒsᵻniː/ 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 22 September 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

    1. 1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, Bibcode:2012P&SS...73...98C, arXiv:1203.4336 Freely accessible, doi:10.1016/j.pss.2012.03.009. See Table 1.
    2. ↑ Asteroid Data Sets Archived 2010-01-17 at WebCite
    3. ↑ Lutz D. Schmadel, Dictionary of Minor Planet Names, p.20.


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