Discovery date September 22, 1859 Aphelion 526.785 Gm (3.521 AU) Semi-major axis 471.082 Gm (3.149 AU) Orbits Sun Discoverer Robert Luther | Minor planet category Main belt Perihelion 415.379 Gm (2.777 AU) Discovered 22 September 1859 Spectral type S-type asteroid Named after Mnemosyne | |
Discovered by Karl Theodor Robert Luther Discovery site Düsseldorf-Bilk Observatory Similar Robert Luther discoveries, Other celestial objects | ||
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 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.
References
57 Mnemosyne Wikipedia(Text) CC BY-SA