493 Griseldis
Griseldis (minor planet designation: 493 Griseldis) is a fairly dark main-belt asteroid 46 km in diameter.[1]
| Discovery | |
|---|---|
| Discovered by | Max Wolf |
| Discovery site | Heidelberg |
| Discovery date | 7 September 1902 |
| Designations | |
| (493) Griseldis | |
| Pronunciation | /ɡrɪˈzɛldɪs/ |
| 1902 JS | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 113.61 yr (41495 d) |
| Aphelion | 3.6625 AU (547.90 Gm) |
| Perihelion | 2.5706 AU (384.56 Gm) |
| 3.1165 AU (466.22 Gm) | |
| Eccentricity | 0.17518 |
| 5.50 yr (2009.6 d) | |
| 193.229° | |
| 0° 10m 44.904s / day | |
| Inclination | 15.177° |
| 357.360° | |
| 47.140° | |
| Physical characteristics | |
| Dimensions | 46.41±4.1 km[1] |
| 51.940 h (2.1642 d)[1] | |
| 0.0622±0.013[1] | |
| P[2] | |
| 14.2 to 17.5 | |
| 10.9[1] | |
Overview
Griseldis is suspected of being impacted by another asteroid in March 2015.[2][3] 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.[4] 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.[4] Also, no activity was seen in archived images from 2010 or 2012 according to a University of Hawaii press release.[4]
References
- "JPL Small-Body Database Browser: 493 Griseldis (1902 JS)". Jet Propulsion Laboratory. Retrieved 9 May 2016.
- Tholen, David J.; Sheppard, Scott S.; Trujillo, Chad A. (2015). "Evidence for an Impact Event on (493) Griseldis". American Astronomical Society: 414.03. Bibcode:2015DPS....4741403T.
- "Main-belt asteroid shows evidence of march collision". Phys.org. 12 November 2015. Retrieved 13 November 2015.
- Main-Belt Asteroid Shows Evidence of March Collision
External links
- 493 Griseldis at AstDyS-2, Asteroids—Dynamic Site
- 493 Griseldis at the JPL Small-Body Database
