57 Mnemosyne

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57 Mnemosyne
Discovery
Discovered by Karl Theodor Robert Luther
Discovery date September 22, 1859
Designations
Named after
Mnemosyne
 
Minor planet category 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[1] km
Mass (1.26 ± 0.24) × 1019[1] kg
Mean density
16.62 ± 3.73[1] g/cm3
0.0315 m/s²
0.0595 km/s
Albedo 0.215 [2]
Temperature ~157 K
Spectral type
S
7.03

57 Mnemosyne (/nɨˈmɒsɨn/ 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[edit]

  1. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  2. ^ Asteroid Data Sets
  3. ^ Lutz D. Schmadel, Dictionary of Minor Planet Names, p.20.