129 Antigone
Encyclopedia : 1 : 12 : 129 : 129 Antigone
| Orbital characteristics [1] | |
|---|---|
| Orbit type | Main belt |
| Semimajor axis | 2.868 AU |
| Perihelion distance | 2.256 AU |
| Aphelion distance | 3.481 AU |
| Orbital period | 4.86 years |
| Inclination | 12.22° |
| Eccentricity | 0.214 |
| Physical characteristics [1] | |
| Diameter | 125 km |
| Rotation period | 4.957 hours |
| Spectral class [5] | S |
| Abs. magnitude | 7.07 |
| Albedo [4] | 0.166 |
| History [2] | |
| Discoverer | C. H. F. Peters, 1873 |
129 Antigone is a large main belt asteroid. 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 [link]. A model constructed from these shows Antigone itself to be quite regularly shaped [link].
Since 1985, a total of three stellar occultations by Antigone have been observed.
Aspects
| 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 |
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