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Koronis family

From Wikipedia, the free encyclopedia
Asteroid family
Compilation of CGI Koronis family asteroids from NASA, seeSpins on Koronis asteroids

TheKoronis orKoronian family (FIN:605), also known as theLacrimosa family,[1]: 16  is a very largeasteroid family ofstony asteroids, located in theouter region of theasteroid belt. They are thought to have been formed at least two billion years ago in a catastrophic collision between two larger bodies. The family is named after158 Koronis, and the largest known member (208 Lacrimosa) is about 41 km (25 mi) in diameter. The Koronis family travels in a cluster along the same orbit.[2] It has 5949 members.[1]

This family has two subfamilies. TheKarin family (FIN:610) was formed remarkably recently in a catastrophic collision (destroying the parent body), with an estimated age of 5.72 million years. The Koronis(2) family (FIN:621) with 246 members is the other.[1] It formed 15 million years ago by a non-catastrophic collision with158 Koronis.[3]

On August 28, 1993, theGalileo spacecraft visited a member of this family,243 Ida. A photo of Ida (and its tiny moon Dactyl) is part of the composite image at right (numbered 243).

Large members

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See also:Category:Koronis asteroids
AsteroidMedian
diameter		Semi-major axisOrbital
inclination		Orbital
eccentricity		DiscoveredRefs
158Koronis35.4 km2.867 AU1.00°0.0571876JPL · MPC
167Urda39.9 km2.855 AU2.21°0.0351876JPL · MPC
208Lacrimosa41.0 km2.895 AU1.751°0.0151879JPL · MPC
243Ida31.3 km2.861 AU1.138°0.0461884JPL · MPC
263Dresda23.0 km2.886 AU1.314°0.0791886JPL · MPC
277Elvira27.0 km2.887 AU1.156°0.0891888JPL · MPC
311Claudia24.0 km2.897 AU3.225°0.0081891JPL · MPC
321Florentina27.0 km2.886 AU2.594°0.0431891JPL · MPC
534Nassovia32.3 km2.884 AU3.277°0.0571904JPL · MPC
720Bohlinia33.7 km2.888 AU2.359°0.0141911JPL · MPC
1223Neckar22.8 km2.869 AU2.55052º0.0611931JPL · MPC
9908Auen.a.2.900 AU2.68°0.0361971JPL · MPC

References

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  1. ^abcNesvorný, D.; Broz, M.; Carruba, V. (December 2014). "Identification and Dynamical Properties of Asteroid Families".Asteroids IV. pp. 297–321.arXiv:1502.01628.Bibcode:2015aste.book..297N.doi:10.2458/azu_uapress_9780816532131-ch016.ISBN 9780816532131.S2CID 119280014.
  2. ^"Fresh Spin on Solar Powered Asteroids", Space.com, 10 September 2003
  3. ^Molnar, Lawrence A.; Haegert, M. J. (September 2009). "Details of Recent Collisions of Asteroids 832 Karin and 158 Koronis".American Astronomical Society.41: 27.05.Bibcode:2009DPS....41.2705M.

External links

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