(148975) 2001 XA255
| Discovery | |
|---|---|
| Discovered by | David C. Jewitt, Scott S. Sheppard and Jan Kleyna |
| Discovery date | 9 December 2001 |
| Designations | |
| MPC designation | (148975) 2001 XA255 |
| Centaur | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 3812 days (10.44 yr) |
| Aphelion | 48.731 AU (7.2901 Tm) |
| Perihelion | 9.3364 AU (1.39671 Tm) |
| 29.034 AU (4.3434 Tm) | |
| Eccentricity | 0.67843 |
| 156.44 yr (57141.1 d) | |
| 12.809° | |
| 0° 0m 22.681s / day | |
| Inclination | 12.628° |
| 105.89° | |
| 90.452° | |
| Earth MOID | 8.36221 AU (1.250969 Tm) |
| Jupiter MOID | 4.12722 AU (617.423 Gm) |
| Physical characteristics | |
| Dimensions | 12.5 km |
| 11.1 | |
|
| |
(148975) 2001 XA255, also written as 2001 XA255, is a minor body classified as centaur by the Minor Planet Center.[2] The object is currently trapped in a 1:1 mean-motion resonance with Neptune following a path of the horseshoe type.[3]
Discovery
(148975) 2001 XA255 was discovered on December 9, 2001 by David C. Jewitt, Scott S. Sheppard, and Jan Kleyna observing from the Mauna Kea Observatory.[4]
Orbit
(148975) 2001 XA255 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]
Physical properties
The object has an estimated diameter of 12.5 km and it was classified as an inactive centaur by David C. Jewitt.[5] Its absolute magnitude is 11.2.[1]
Resonance with Neptune
(148975) 2001 XA255 was identified as trapped in a 1:1 mean-motion resonance with Neptune and 1:2 with Uranus by T. Gallardo in 2006.[6] 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]
References
- 1 2 3 "148975 (2001 XA255)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 7 April 2016.
- ↑ MPC list of Centaurs
- 1 2 de la Fuente Marcos, C.; de la Fuente Marcos, R. (2012). "Four temporary Neptune co-orbitals: (148975) 2001 XA255, (310071) 2010 KR59, (316179) 2010 EN65, and 2012 GX17". Astronomy and Astrophysics. 547: L2. arXiv:1210.3466
. Bibcode:2012A&A...547L...2D. doi:10.1051/0004-6361/201220377. - ↑ Jewitt, David C.; Sheppard, S. S.; Kleyna, J.; Marsden, B. G. "2001 XA255". Minor Planet Electronic Circular.
- ↑ Jewitt, David C. (2009). "The Active Centaurs". The Astronomical Journal. 137 (5): 4296–4312. arXiv:0902.4687. Bibcode:2009AJ....137.4296J. doi:10.1088/0004-6256/137/5/4296.
- ↑ ADS link Gallardo, T. (2006) Atlas of the mean-motion resonances in the Solar System
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.
- (148975) 2001 XA255 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
- (148975) 2001 XA255 at the JPL Small-Body Database