| Discovery | |
|---|---|
| Discovered by: | Karl Theodor Robert Luther |
| Discovery date: | August 13, 1861 |
| Orbital characteristics | |
| 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) |
| Avg. 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 characteristics | |
| Dimensions: | 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: | 7.30 |
71 Niobe (nye'-ə-bee, IPA: /ˈnaɪəbi/) 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 (see full list) |
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|---|---|---|
| Previous minor planet | 71 Niobe | Next minor planet |
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| Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Neptune Trojans · Comets · Trans-Neptunians (Kuiper belt • Scattered disc objects • Oort cloud) |
| For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons, meteoroids and the Solar System. For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names. |
