(316179) 2010 EN65
|
2010 EN65 is jumping from L4 to L5 via L3. | |
| Discovery | |
|---|---|
| Discovered by | David L. Rabinowitz and Suzanne W. Tourtellotte |
| Discovery date | 7 March 2010 |
| Designations | |
| MPC designation | (316179) 2010 EN65 |
| Centaur | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 8530 days (23.35 yr) |
| Aphelion | 40.601 AU (6.0738 Tm) |
| Perihelion | 21.137 AU (3.1621 Tm) |
| 30.869 AU (4.6179 Tm) | |
| Eccentricity | 0.31527 |
| 171.51 yr (62644.3 d) | |
| 43.058° | |
| 0° 0m 20.688s / day | |
| Inclination | 19.223° |
| 234.40° | |
| 226.05° | |
| Earth MOID | 20.1824 AU (3.01924 Tm) |
| Jupiter MOID | 16.155 AU (2.4168 Tm) |
| Jupiter Tisserand parameter | 4.534 |
| Physical characteristics | |
| Dimensions | 200 km |
| 6.9 | |
|
| |
(316179) 2010 EN65, also written as 2010 EN65, is a minor body (as of October 2012) classified by the Minor Planet Center as a centaur. However, the object is actually a jumping trojan, is jumping from the Lagrangian point L4 into L5 via L3.[2] As of 2016, it is 54 AU from Neptune. By 2070, it will be 69 AU from Neptune.[3]
Discovery
(316179) 2010 EN65 was discovered on March 7, 2010 by David L. Rabinowitz and Suzanne W. Tourtellotte using the 1.3-m reflector from Cerro Tololo.[4]
Orbit
(316179) 2010 EN65 follows a rather eccentric orbit (0.31) with a semi-major axis of 30.72 AU and an inclination of 19.3º.[1] Its orbit is well determined with images dating back to 1989.
Physical properties
(316179) 2010 EN65 is a quite large minor body with an absolute magnitude of 6.9 and a diameter likely close to 200 km (120 mi).[1]
Jumping trojan
(316179) 2010 EN65 is another co-orbital of Neptune, the second brightest after the quasi-satellite (309239) 2007 RW10. (316179) 2010 EN65 is currently transitioning from librating around Lagrangian point L4 to librating around L5.[2] This unusual trojan-like behavior is termed "jumping trojan".[5]
References
- 1 2 3 "JPL's Solar System Dynamics data on 2010 EN65". Retrieved 8 April 2016.
- 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. (rotating frame)
- ↑ 2010 EN65 at JPL Horizons Change "Observer Location" to @Neptune
- ↑ Lowe, A.; Helin, E. F.; Pravdo, S.; Lawrence, K.; Hicks, M.; Thicksten, R.; Rabinowitz, D.; Tourtellotte, S.; Marsden, B. G. (7 May 2010). "2010 EN65". Minor Planet Electronic Circular. 2010-J33.
- ↑ Tsiganis, K.; Dvorak, R.; Pilat-Lohinger, E. (February 2000). "Thersites: a `jumping' Trojan?". Astronomy and Astrophysics 354: 1091–1100. Bibcode:2000A&A...354.1091T.
External links
- (316179) 2010 EN65 data at MPC
- IAU list of centaurs and scattered-disk objects
- IAU list of trans-neptunian objects
- Another list of TNOs
- (316179) 2010 EN65 at the JPL Small-Body Database
| ||||||
| ||||||||||||||||||||||||||||
| ||||||||||||||