57 Mnemosyne

57 Mnemosyne
Orbital characteristics 1
Orbit type Main belt
Semimajor axis 3.150 AU
Perihelion distance 2.776 AU
Aphelion distance 3.523 AU
Orbital period 5.59 years
Inclination 15.20°
Eccentricity 0.119
Physical characteristics 1
Diameter 112.6 km
Rotation period 3 12.463 hours
Spectral class S
Abs. magnitude 7.03
Albedo 4 0.215
History 2
Discoverer R. Luther, 1859

57 Mnemosyne (ni-mos'-i-nee) is a large Main belt asteroid. It is a S-type asteroid, so it has a bright surface and is probably a mixture of iron-nickel and silicates.

It was discovered by R. Luther on September 22, 1859. It is named after Mnemosyne, a Titaness in Greek mythology.

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