A diagram showing the orbits of Crantor and Jupiter.
|Discovered by||Near-Earth Asteroid Tracking (NEAT) project|
|Discovery date||12 April 2002|
|Epoch 16 February 2017 (JD 2457800.5)|
|Uncertainty parameter 1|
|Observation arc||4882 days (13.37 yr)|
|Aphelion||24.8354 AU (3.71532 Tm)|
|Perihelion||14.03364 AU (2.099403 Tm)|
|19.4345 AU (2.90736 Tm)|
|85.68 yr (31294 d)|
|Earth MOID||13.0554 AU (1.95306 Tm)|
|Jupiter MOID||8.76471 AU (1.311182 Tm)|
|13.94 h (0.581 d)|
Sidereal rotation period
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.
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.
- "JPL Small-Body Database Browser: 83982 Crantor". Jet Propulsion Laboratory. Retrieved 25 March 2016.
- Near-infrared spectra of centaurs and Kuiper belt objects
- MPC list of Centaurs
- Gallardo, T. (September 2006). "Atlas of the mean motion resonances in the Solar System". Icarus. 184 (1): 29–38. Bibcode:2006Icar..184...29G. doi:10.1016/j.icarus.2006.04.001.
- de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (March 2013). "Crantor, a short-lived horseshoe companion to Uranus". Astronomy and Astrophysics. 551: A114(8 pages). arXiv: . Bibcode:2013A&A...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, Carlos; & de la Fuente Marcos, Raúl (2013), Astronomy and Astrophysics, Volume 551, A114 (8 pages).