|Discovered by||Max Wolf|
|Discovery date||7 September 1902|
|Epoch 31 July 2016 (JD 2457600.5)|
|Uncertainty parameter 0|
|Observation arc||113.61 yr (41495 d)|
|Aphelion||3.6625 astronomical unit|AU (547.90 Gm)|
|Perihelion||2.5706 AU (384.56 Gm)|
|3.1165 AU (466.22 Gm)|
|Orbital period||5.50 yr (2009.6 d)|
|Mean motion||0° 10m 44.904s / day|
|Longitude of ascending node||357.360°|
|Rotation period||51.940 h (2.1642 d)|
|Apparent magnitude||14.2 to 17.5|
|Absolute magnitude (H)||10.9|
Griseldis is suspected of having been impacted by another asteroid in March 2015. Other asteroids suspected of an asteroid-on-asteroid impact include P/2010 A2 and 596 Scheila which also showed extended features (tails).
The asteroid was observed with the Subaru telescope (8m), the Magellan Telescopes (6.5), and also the University of Hawaii 2.2 m telescope in early 2015. The activity was detected on the Subaru in late March, and confirmed on the Magellan telescope a few days later (which is in Chile), but no activity was seen by April. Also, no activity was seen in archived images from 2010 or 2012 according to a University of Hawaii press release.
- "JPL Small-Body Database Browser: 493 Griseldis (1902 JS)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=493.
- "Evidence for an Impact Event on (493) Griseldis". American Astronomical Society: 414.03. 2015. Bibcode: 2015DPS....4741403T.
- "Main-belt asteroid shows evidence of march collision". Phys.org. 2015-11-12. http://phys.org/news/2015-11-main-belt-asteroid-evidence-collision.html.
- Main-Belt Asteroid Shows Evidence of March Collision
- 493 Griseldis at AstDyS-2, Asteroids—Dynamic Site
- 493 Griseldis at the JPL Small-Body Database
Original source: https://en.wikipedia.org/wiki/ 493 Griseldis. Read more