- 71 Niobe
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71 Niobe DiscoveryDiscovered by Karl Theodor Robert Luther Discovery date August 13, 1861 DesignationsNamed after Niobe Alternate name(s) Minor planet
categoryMain belt Epoch December 31, 2006 (JD 2454100.5) Aphelion 484.945 Gm (3.242 AU) Perihelion 339.408 Gm (2.269 AU) Semi-major axis 412.176 Gm (2.755 AU) Eccentricity 0.177 Orbital period 1670.455 d (4.57 a) Average orbital speed 17.80 km/s Mean anomaly 13.883° Inclination 23.256° Longitude of ascending node 316.094° Argument of perihelion 267.445° Physical characteristicsDimensions 83.4 km Mass 6.1×1017 kg Mean density ? g/cm³ Equatorial surface gravity 0.0233 m/s² Escape velocity 0.0441 km/s Rotation period ? d Albedo 0.305 [1] Temperature ~168 K Spectral type S Absolute magnitude (H) 7.30 71 Niobe (
/ˈnaɪ.əbiː/ ny-ə-bee) is a quite large main-belt asteroid. It was discovered by Robert Luther on August 13, 1861, and named after Niobe, a character in Greek mythology.References
Minor planets navigator Small Solar System bodies Minor planets - Designation
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Categories:- Main Belt asteroids
- S-type asteroids
- Asteroids named from Greek mythology
- Astronomical objects discovered in 1861
- S-type Main Belt asteroid stubs
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