190 Ismene
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| Orbital characteristics 1 | |
|---|---|
| Orbit type | Main belt (Hilda) |
| Semimajor axis | 3.984 AU |
| Perihelion distance | 3.319 AU |
| Aphelion distance | 4.648 AU |
| Orbital period | 7.95 years |
| Inclination | 6.17° |
| Eccentricity | 0.167 |
| Physical characteristics | |
| Diameter 2 | 164.4 km |
| Rotation period | 6.52 hours 3 |
| Spectral class 2 | P |
| Abs. magnitude 1 | 7.59 |
| Albedo 2 | 0.058 |
| History 4 | |
| Discoverer | C. H. F. Peters, 1878 |
190 Ismene is a very large main belt asteroid. Being a P-type asteroid, it has a very dark surface and may contain water.
Ismene orbits near the outer edge of the asteroid belt. It is one of the Hilda asteroids, which are locked in 3:2 resonance with the planet Jupiter.
It was discovered by C. H. F. Peters on September 22, 1878 in Clinton, New York and named after Ismene, the sister of Antigone in Greek mythology.
[edit] Aspects
| Stationary, retrograde | Opposition | Distance to Earth (AU) |
Maximum brightness (mag) |
Stationary, prograde | conjunction to Sun | |
|---|---|---|---|---|---|---|
| 24. March 2004 | 8. September 2004 | 28. October 2004 | 2,54197 AE | 12,6 mag | 20. December 2004 | |
| 1. June 2005 | 21. November 2005 | 11. January 2006 | 2,37126 AE | 12,3 mag | 1. March 2006 | |
| 20. August 2006 | 23. January 2007 | 18. March 2007 | 2,83734 AE | 12,8 mag | 11. May 2007 | |
| 16. October 2007 | 8. March 2008 | 4. May 2008 | 3,37658 AE | 13,6 mag | 4. July 2008 | |
| 26. November 2008 | 13. April 2009 | 13. June 2009 | 3,63498 AE | 13,9 mag | 14. August 2009 | |
| 1. January 2010 | 21. May 2010 | 22. July 2010 | 3,52905 AE | 13,8 mag | 19. September 2010 | |
| 8. February 2011 | 9. July 2011 | 4. September 2011 | 3,08879 AE | 13,2 mag | 29. October 2011 | |
| 27. March 2012 | 11. September 2012 | 31. October 2012 | 2,52150 AE | 12,5 mag | 23. December 2012 | |
| 5. June 2013 | 24. November 2013 | 14. January 2014 | 2,38084 AE | 12,4 mag | 4. March 2014 | |
| 23. August 2014 | 26. January 2015 | 20. March 2015 | 2,86298 AE | 12,9 mag | 13. May 2015 | |
| 18. October 2015 | 10. March 2016 | 6. May 2016 | 3,39456 AE | 13,7 mag | 6. July 2016 | |
| 27. November 2016 | 15. April 2017 | 15. June 2017 | 3,63802 AE | 13,9 mag | 16. August 2017 | |
| 2. January 2018 | 23. May 2018 | 24. July 2018 | 3,51645 AE | 13,8 mag | 21. September 2018 | |
| 10. February 2019 | 11. July 2019 | 6. September 2019 | 3,06449 AE | 13,2 mag | 1. November 2019 | |
| 29. March 2020 | 14. September 2020 | 3. November 2020 | 2,50185 AE | 12,5 mag | 25. December 2020 |
| Minor planets | ||
|---|---|---|
| Previous minor planet | 190 Ismene | 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.
