Astronomy:493 Griseldis
| 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) |
| |{{{apsis}}}|helion}} | 3.6625 astronomical unit|AU (547.90 Gm) |
| |{{{apsis}}}|helion}} | 2.5706 AU (384.56 Gm) |
| 3.1165 AU (466.22 Gm) | |
| Eccentricity | 0.17518 |
| Orbital period | 5.50 yr (2009.6 d) |
| Mean anomaly | 193.229° |
| Mean motion | 0° 10m 44.904s / day |
| Inclination | 15.177° |
| Longitude of ascending node | 357.360° |
| 47.140° | |
| Physical characteristics | |
| Dimensions | 46.41±4.1 km[1] |
| Rotation period | 51.940 h (2.1642 d)[1] |
| Geometric albedo | 0.0622±0.013[1] |
| P[2] | |
| Apparent magnitude | 14.2 to 17.5 |
| Absolute magnitude (H) | 10.9[1] |
Griseldis (minor planet designation: 493 Griseldis) is a fairly dark main-belt asteroid 46 km in diameter.[1]
Overview
Griseldis is suspected of having been impacted by another asteroid in March 2015.[2][3] Other asteroids suspected of an asteroid-on-asteroid impact include 354P/LINEAR 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]
See also
- 354P/LINEAR
- 596 Scheila
- P/2016 G1 (PanSTARRS)
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 493 Griseldis (1902 JS)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=493.
- ↑ 2.0 2.1 "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.
- ↑ 4.0 4.1 4.2 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
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