Английская Википедия:(148975) 2001 XA255
Шаблон:Mp, provisional designation: Шаблон:Mp, is a dark minor planet in the outer Solar System, classified as centaur, approximately Шаблон:Convert in diameter.[1] It was discovered on 9 December 2001, by David C. Jewitt, Scott S. Sheppard, and Jan Kleyna observing from the Mauna Kea Observatory.[2] The object is currently trapped in a 1:1 mean-motion resonance with Neptune following a path of the horseshoe type.[3]
Orbit and classification
Шаблон:Mp follows a very eccentric orbit (0.68) with perihelion just inside the orbit of Saturn, aphelion in the trans-Neptunian belt and a semi-major axis of 28.9 AU. The orbital inclination of this object is moderate at 12.6º.[1]
Resonance with Neptune
Шаблон:Mp was identified as trapped in a 1:1 mean-motion resonance with Neptune and 1:2 with Uranus by T. Gallardo in 2006.[4] The object is dynamically unstable and it entered the region of the giant planets relatively recently, perhaps 50,000 years ago, from the scattered disk. It follows a short-lived horseshoe orbit around Neptune.[3]
Physical characteristics
The object has an estimated diameter of 12.5 km and it was classified as an inactive centaur by David Jewitt.[5] Observations by the NEOWISE mission gave a larger diameter of 37.7 kilometers and an albedo of 0.041.[6] It has an absolute magnitude is 11.1.[1]
See also
References
External links
- 2001 XA255, Jewitt, D. C., Sheppard, S. S., Kleyna, J., & Marsden, B. G. 2002, Minor Planet Electronic Circular, 2002-A85.
- The Active Centaurs, Jewitt, D. C. 2009, Astronomical Journal, Volume 137, Number 5, pp. 4296–4312.
- Шаблон:Mp data at MPC
- Atlas of the mean motion resonances in the Solar System Gallardo, T. 2006, Icarus, Volume 184, Issue 1, pp. 29–38.
- Four temporary Neptune co-orbitals: (148975) 2001 XA255, (310071) 2010 KR59, (316179) 2010 EN65, and 2012 GX17 de la Fuente Marcos, C., & de la Fuente Marcos, R. 2012, Astronomy and Astrophysics, Volume 547, id.L2, 7 pp.
- IAU list of centaurs and scattered-disk objects
- IAU list of trans-neptunian objects
- Another list of TNOs
- Шаблон:JPL small body
Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Trans-Neptunian objects Шаблон:Authority control
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