135 Hertha
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| Discovery | |
|---|---|
| Discovered by: | Christian Heinrich Friedrich Peters |
| Discovery date: | February 18, 1874 |
| Alternative names: | |
| Minor planet category: | Main belt |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion distance: | 438.283 Gm (2.930 AU) |
| Perihelion distance: | 288.252 Gm (1.927 AU) |
| Semi-major axis: | 363.268 Gm (2.428 AU) |
| Eccentricity: | 0.207 |
| Orbital period: | 1382.136 d (3.78 a) |
| Avg. orbital speed: | 18.91 km/s |
| Mean anomaly: | 246.145° |
| Inclination: | 2.305° |
| Longitude of ascending node: | 343.896° |
| Argument of perihelion: | 340.012° |
| Physical characteristics | |
| Dimensions: | 79.2 km |
| Mass: | 5.2×1017 kg |
| Mean density: | ? g/cm³ |
| Equatorial surface gravity: | 0.0221 m/s² |
| Escape velocity: | 0.0419 km/s |
| Rotation period: | ? d |
| Albedo: | ? |
| Temperature: | ~179 K |
| Spectral type: | M |
| Absolute magnitude: | 8.23 |
135 Hertha is a large M-type main belt asteroid. It orbits among the Nysa asteroid family. Lightcurve data from Hertha indicates a flattened body [1]. Radar observations indicate that Hertha is non-metallic. Hertha was discovered by C. H. F. Peters on February 18, 1874 in Clinton, New York. One occultation of a star by the asteroid has been observed, in 2000.
[edit] Aspects
| Stationary, than retrograde | Opposition | Distance at opposition | Brightness at opposition | Stationary, than prograde | Conjunction to sun | |
|---|---|---|---|---|---|---|
| 24. August 2004 | 7. October 2004 | 1,05252 AE | 10,1 mag | 14. November 2004 | 16. June 2005 | |
| 8. December 2005 | 29. January 2006 | 1,91749 AE | 12,1 mag | 23. March 2006 | 12. September 2006 | |
| 11. March 2007 | 28. April 2007 | 1,45456 AE | 11,2 mag | 16. June 2007 | 25. January 2008 | |
| 26. September 2008 | 12. November 2008 | 1,30154 AE | 10,8 mag | 25. December 2008 | 7. July 2009 | |
| 24. December 2009 | 14. February 2010 | 1,93752 AE | 12,1 mag | 10. April 2010 | 1. October 2010 | |
| 15. April 2011 | 28. May 2011 | 1,20144 AE | 10,6 mag | 12. July 2011 | 16. March 2012 | |
| 20. October 2012 | 9. December 2012 | 1,54326 AE | 11,4 mag | 24. January 2013 | 26. July 2013 | |
| 10. January 2014 | 3. March 2014 | 1,89260 AE | 12,0 mag | 26. April 2014 | 23. October 2014 | |
| 2. June 2015 | 11. July 2015 | 0,97737 AE | 9,9 mag | 19. August 2015 | 27. April 2016 | |
| 9. November 2016 | 30. December 2016 | 1,73473 AE | 11,8 mag | 18. February 2017 | 13. August 2017 | |
| 29. January 2018 | 21. March 2018 | 1,78297 AE | 11,8 mag | 13. May 2018 | 19. November 2018 | |
| 26. July 2019 | 3. September 2019 | 0,93706 AE | 9,6 mag | 10. October 2019 | 29. May 2020 | |
| 26. November 2020 | 17. January 2021 | 1,86467 AE | 12,0 mag | 10. March 2021 | 30. August 2021 |
| Minor planets | ||
|---|---|---|
| Previous minor planet | 135 Hertha | 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.
