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83982 Crantor

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Discovery date  12 April 2002
Alternative names  2002 GO9
Discovered  12 April 2002
Named after  Crantor
Asteroid group  Centaur
MPC designation  83982
Observation arc  4882 days (13.37 yr)
Orbits  Sun
Discovery site  Palomar Observatory
83982 Crantor casjobssdssorgImgCutoutDR6getjpegaspxra204
Discovered by  Near-Earth Asteroid Tracking (NEAT) project
Aphelion  24.8354 AU (3.71532 Tm)
Discoverer  Near-Earth Asteroid Tracking
Similar  Solar System, Sun, 55576 Amycus, 52975 Cyllarus, 8405 Asbolus

83982 Crantor /ˈkræntɔːr/, provisionally known as 2002 GO9, is a centaur in a 1:1 mean-motion resonance with Uranus.



(83982) 2002 GO9 was discovered on April 12, 2002 by the Near-Earth Asteroid Tracking (NEAT) program at Palomar. It is named after the Lapith Crantor.


Crantor follows a moderately eccentric orbit (eccentricity of 0.28) with a semi-major axis of 19.43 AU and an inclination of 12.78º.

Physical properties

Crantor is a relatively large minor body with an absolute magnitude of H=8.8, translating into a diameter of around 60 km. Water ice has been detected on Crantor with a confidence of more than 3σ (99.7%).

Co-orbital with Uranus

Crantor was first suggested as a possible co-orbital of Uranus in 2006. Crantor follows a complex, transient horseshoe orbit around Uranus. Classical horseshoe orbits include the Lagrangian points L3, L4, and L5, but Crantor's horseshoe orbit also brings it near Uranus. The motion of Crantor is mainly controlled by the influence of the Sun and Uranus, but Saturn has a significant destabilizing effect. The precession of the nodes of Crantor is accelerated by Saturn, controlling its evolution and short-term stability.


83982 Crantor Wikipedia

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