A diagram showing the orbits of Crantor and Jupiter.
|Discovery and designation|
|Discovered by||Near-Earth Asteroid Tracking (NEAT) project|
|Discovery date||April 12, 2002|
|Epoch April 18, 2013 (JD 2456400.5)|
|85.12 yr (31091 d)|
Sidereal rotation period
Crantor follows a moderately eccentric orbit (eccentricity of 0.27) with a semi-major axis of 19.36 AU and an inclination of 12.78º.
Crantor is a relatively large minor body with an absolute magnitude of H=8.5, 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.
- JPL Small-Body Database Browser on 83982 Crantor Accessed 2013-01-07
- Near-infrared spectra of centaurs and Kuiper belt objects
- MPC list of Centaurs
- Gallardo, T. (2006). "Atlas of the mean motion resonances in the Solar System] Gallardo". Icarus 184 (1): 29–38. Bibcode:2006Icar..184...29G. doi:10.1016/j.icarus.2006.04.001.
- de la Fuente Marcos, C.; de la Fuente Marcos, R. (2013). "Crantor, a short-lived horseshoe companion to Uranus". Astronomy and Astrophysics 551: A114(8 pages). arXiv:astro-ph/1301.0770. Bibcode:2013A%26A...551A.114D. doi:10.1051/0004-6361/201220646.
- JPL's Solar System Dynamics data on Crantor
- Further reading
- Atlas of the mean motion resonances in the Solar System Gallardo, T. 2006, Icarus, Volume 184, Issue 1, p. 29-38.
- Crantor, a short-lived horseshoe companion to Uranus de la Fuente Marcos, C., & de la Fuente Marcos, R. 2013, Astronomy and Astrophysics, Volume 551, A114 (8 pages).
- This is an image of Crantor taken by the SDSS telescope on 16APR2002 when it was 13.1au from Earth /Fermats Brother
- Three centaurs follow Uranus through the solar system (Jun 18, 2013)