129 Antigone
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| Discovery | |
|---|---|
| Discovered by: | Christian Heinrich Friedrich Peters |
| Discovery date: | February 5, 1873 |
| Alternative names: | |
| Minor planet category: | Main belt |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion distance: | 520.360 Gm (3.478 AU) |
| Perihelion distance: | 337.731 Gm (2.258 AU) |
| Semi-major axis: | 429.045 Gm (2.868 AU) |
| Eccentricity: | 0.213 |
| Orbital period: | 1774.045 d (4.86 a) |
| Avg. orbital speed: | 17.39 km/s |
| Mean anomaly: | 110.610° |
| Inclination: | 12.218° |
| Longitude of ascending node: | 136.437° |
| Argument of perihelion: | 108.207° |
| Physical characteristics | |
| Dimensions: | 125.0 km |
| Mass: | 2.0×1018 kg |
| Mean density: | ? g/cm³ |
| Equatorial surface gravity: | 0.0349 m/s² |
| Escape velocity: | 0.0661 km/s |
| Rotation period: | ? d |
| Albedo: | ? |
| Temperature: | ~164 K |
| Spectral type: | ? |
| Absolute magnitude: | 7.07 |
129 Antigone is a large main belt asteroid. Radar observations indicate that it is composed of almost pure nickel-iron. It and other similar asteroids probably originate from the core of a shattered Vesta-like planetesimal which had a differentiated interior. It was discovered by C. H. F. Peters on February 5, 1873 and named after Antigone, the Theban princess in Greek mythology.
In 1979 a possible satellite of Antigone was suggested based on lightcurve data [1]. A model constructed from these shows Antigone itself to be quite regularly shaped [2].
Since 1985, a total of three stellar occultations by Antigone have been observed.
[edit] Aspects
| Stationary, than retrograde | Opposition | Distance at opposition | Brightness at opposition | Stationary, than prograde | Conjunction to sun | |
|---|---|---|---|---|---|---|
| 31. March 2005 | 6. May 2005 | 1,30592 AE | 9,9 mag | 22. June 2005 | 26. January 2006 | |
| 4. August 2006 | 21. September 2006 | 1,99303 AE | 11,2 mag | 13. November 2006 | 23. April 2007 | |
| 2. October 2007 | 26. November 2007 | 2,52166 AE | 12,1 mag | 23. January 2008 | 24. June 2008 | |
| 6. December 2008 | 26. January 2009 | 2,06346 AE | 11,2 mag | 19. March 2009 | 16. September 2009 | |
| 23. April 2010 | 2. June 2010 | 1,27537 AE | 9,8 mag | 16. July 2010 | 13. February 2011 | |
| 15. August 2011 | 3. October 2011 | 2,12964 AE | 11,5 mag | 27. November 2011 | 2. May 2012 | |
| 9. October 2012 | 3. December 2012 | 2,51439 AE | 12,1 mag | 30. January 2013 | 3. July 2013 | |
| 20. December 2013 | 6. February 2014 | 1,92768 AE | 10,9 mag | 29. March 2014 | 6. October 2014 | |
| 16. May 2015 | 29. June 2015 | 1,31079 AE | 9,9 mag | 9. August 2015 | 28. February 2016 | |
| 23. August 2016 | 12. October 2016 | 2,24791 AE | 11,7 mag | 9. December 2016 | 11. May 2017 | |
| 17. October 2017 | 12. December 2017 | 2,48589 AE | 12,0 mag | 7. February 2018 | 14. July 2018 | |
| 6. January 2019 | 19. February 2019 | 1,78253 AE | 10,7 mag | 10. April 2019 | 30. October 2019 | |
| 6. June 2020 | 21. July 2020 | 1,40759 AE | 10,0 mag | 1. September 2020 | 12. March 2021 |
| Minor planets | ||
|---|---|---|
| Previous minor planet | 129 Antigone | 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.
