493 Griseldis

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493 Griseldis
Discovery
Discovered by Max Wolf
Discovery site Heidelberg
Discovery date 7 September 1902
Designations
MPC designation (493) Griseldis
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°
Earth MOID 1.60182 AU (239.629 Gm)
Jupiter MOID 1.94028 AU (290.262 Gm)
Jupiter Tisserand parameter 3.140
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]

493 Griseldis is a fairly dark main-belt asteroid 46 km in diameter.[1]

Overview[edit]

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[edit]

  1. ^ a b c d e f "JPL Small-Body Database Browser: 493 Griseldis (1902 JS)". Jet Propulsion Laboratory. Retrieved 9 May 2016. 
  2. ^ a b Tholin, David J.; Sheppard, Scott S.; Trujillo, Chad A. (2015). "Evidence for an Impact Event on (493) Griseldis". American Astronomical Society. Bibcode:2015DPS....4741403T. 
  3. ^ "Main-belt asteroid shows evidence of march collision". Phys.org. 2015-11-12. Retrieved 2015-11-13. 
  4. ^ a b c Main-Belt Asteroid Shows Evidence of March Collision

External links[edit]