71 Niobe
From Wikipedia, the free encyclopedia
| Discovery | |
|---|---|
| Discovered by: | Karl Theodor Robert Luther |
| Discovery date: | August 13, 1861 |
| Alternative names: | |
| Minor planet category: | Main belt |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion distance: | 484.945 Gm (3.242 AU) |
| Perihelion distance: | 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'-o-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.
[edit] Aspects
| Stationary, then retrograde | Opposition | Distance at opposition | Brightness at opposition (mag) | Stationary, then prograde | Conjunction to sun | |
|---|---|---|---|---|---|---|
| 2 October 2004 | 28 November 2004 | 2.30546 AU | 12.1 mag | 11 January 2005 | 6 July 2005 | |
| 26 December 2005 | 18 February 2006 | 1.55055 AU | 10.5 mag | 11 April 2006 | 10 November 2006 | |
| 2 June 2007 | 25 July 2007 | 1.56069 AU | 10.6 mag | 15 September 2007 | 6 March 2008 | |
| 11 August 2008 | 17 October 2008 | 2.30755 AU | 12.1 mag | 29 November 2008 | 21 May 2009 | |
| 9 November 2009 | 30 December 2009 | 2.04579 AU | 11.6 mag | 21 February 2010 | 16 August 2010 | |
| 26 February 2011 | 23 April 2011 | 1.40423 AU | 10.4 mag | 24 May 2011 | 14 January 2012 | |
| 1 July 2012 | 3 September 2012 | 1.92930 AU | 11.4 mag | 24 October 2012 | 7 April 2013 | |
| 18 September 2013 | 17 November 2013 | 2.34605 AU | 12.1 mag | 30 December 2013 | 24 June 2014 | |
| 13 December 2014 | 4 February 2015 | 1.66624 AU | 10.6 mag | 31 March 2015 | 15 October 2015 | |
| 19 May 2016 | 6 July 2016 | 1.47293 AU | 10.5 mag | 24 August 2016 | 23 February 2017 | |
| 31 July 2017 | 6 October 2017 | 2.24228 AU | 12.0 mag | 21 November 2017 | 10 May 2018 | |
| 28 October 2018 | 19 December 2018 | 2.15522 AU | 11.8 mag | 7 February 2019 | 1 August 2019 | |
| 30 January 2020 | 27 March 2020 | 1.41986 AU | 10.4 mag | 6 May 2020 | 26 December 2020 |
[edit] References
| Minor planets | ||
|---|---|---|
| Previous minor planet | 71 Niobe | Next minor planet |
| List of asteroids | ||
Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Comets · Trans-Neptunians (Kuiper belt • Scattered disc • Oort cloud)
For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons and the Solar System.
For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.
