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493 Griseldis

Summary

Griseldis (minor planet designation: 493 Griseldis) is a fairly dark main-belt asteroid 46 km in diameter.[1]

493 Griseldis
Discovery
Discovered byMax Wolf
Discovery siteHeidelberg
Discovery date7 September 1902
Designations
(493) Griseldis
Pronunciation/ɡrɪˈzɛldɪs/
1902 JS
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc113.61 yr (41495 d)
Aphelion3.6625 AU (547.90 Gm)
Perihelion2.5706 AU (384.56 Gm)
3.1165 AU (466.22 Gm)
Eccentricity0.17518
5.50 yr (2009.6 d)
193.229°
0° 10m 44.904s / day
Inclination15.177°
357.360°
47.140°
Physical characteristics
Dimensions46.41±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 edit

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 edit

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 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.
  3. ^ "Main-belt asteroid shows evidence of march collision". Phys.org. 12 November 2015. Retrieved 13 November 2015.
  4. ^ a b c Main-Belt Asteroid Shows Evidence of March Collision

External links edit

  • 493 Griseldis at AstDyS-2, Asteroids—Dynamic Site
    • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
  • 493 Griseldis at the JPL Small-Body Database  
    • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters