(316179) 2010 EN65

Jumping Neptune trojan July 2021 yes #C2E0FF (316179) 2010 EN 65 Lagrange points2.svg 2010 EN 65 is jumping from to via . D. L. RabinowitzS. W. Tourtellotte La Silla Obs. 7 March 2010 (316179) 2010 EN 65 TNONeptune trojandistant 23 March 2018 (JD 2458200.5) 2 25.45 yr (9,296 days) 40.367 AU 21.148 AU 30.758 AU 0.3124 170.58 yr (62,306 days) 48.107° 0.0058 ms / day 19.209° 234.47° 225.77° 176 km (est. at 0.08) 7.17 (316179) 2010 EN 65 is a trans-Neptunian object orbiting the Sun. However, with a semi-major axis of 30.8 AU, the object is actually a jumping Neptune trojan, co-orbital with Neptune, as the giant planet has a similar semi-major axis of 30.1 AU. The body is jumping from the Lagrangian point into via . 2016, it is 54 AU from Neptune. By 2070, it will be 69 AU from Neptune. Discovery 2010 EN 65 was discovered on 7 March 2010, by David L. Rabinowitz and Suzanne W. Tourtellotte using the 1.3-meter Small and Medium Research Telescope System (SMARTS) at Cerro Tololo Observatory in Chile. Orbit 2010 EN 65 follows a rather eccentric orbit (0.31) with a semi-major axis of 30.72 AU and an inclination of 19.3º. Its orbit is well determined with images dating back to 1989. thumb|left|Animation of 2010 EN 65 relative to Sun and Neptune 1600–2398Magenta 2010 EN 65Lime NeptuneYellow Sun Physical properties 2010 EN 65 is a quite large minor body with an absolute magnitude of 7.17 and an estimated diameter of 176 km mi off us 3 based on an assumed albedo of 0.08. Jumping trojan 2010 EN 65 is another co-orbital of Neptune, the second brightest after the quasi-satellite (309239) 2007 RW 10. 2010 EN 65 is currently transitioning from librating around Lagrangian point yes to librating around yes. This unusual trojan-like behavior is termed "jumping trojan". Numbering and naming This minor planet was numbered by the Minor Planet Center on 7 February 2012 (M.P.C. 78220). 2025, it has not been named. If named, it will follow the naming scheme already established with 385571 Otrera and 385695 Clete, which is to name these objects after figures related to the Amazons, an all-female warrior tribe that fought in the Trojan War on the side of the Trojans against the Greek. References Lowe A. Helin E. F. Pravdo S. Lawrence K. Hicks M. Thicksten R. Rabinowitz D. Tourtellotte S. Marsden B. G. 2010 EN65 https://www.minorplanetcenter.net/iau/mpec/K10/K10J33.html Minor Planet Electronic Circular 2010-J33 7 May 2010 2015-04-18 last obs. JPL Small-Body Database Browser: 316179 (2010 EN65) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2316179 Jet Propulsion Laboratory 25 February 2018 316179 (2010 EN65) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=316179 25 February 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 23 July 2021 C. de la Fuente Marcos R. de la Fuente Marcos November 2012 Four temporary Neptune co-orbitals: (148975) 2001 XA255, (310071) 2010 KR59, (316179) 2010 EN65, and 2012 GX17 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012A&A...547L...2D Astronomy and Astrophysics 547 7 2012A&A...547L...2D 10.1051/0004-6361/201220377 1210.3466 118622987 7 September 2016 (rotating frame) List of Known Trans-Neptunian Objects Johnston's Archive 18 August 2020 Johnston Wm. Robert https://www.johnstonsarchive.net/astro/tnoslist.html 23 July 2021 Asteroid Size Estimator CNEOS NASA/JPL https://cneos.jpl.nasa.gov/tools/ast_size_est.html 23 July 2021 2000A&A...354.1091T Thersites: a 'jumping' Trojan? Tsiganis K. Dvorak R. Pilat-Lohinger E. February 2000 Astronomy and Astrophysics 354 1091–1100 https://www.iau.org/static/science/scientific_bodies/working_groups/97/wg-sbn-triennial-report-2015-2018.pdf DIVISION F / Working Group for Small Body Nomenclature Working Group for Small Body Nomenclature. THE TRIENNIAL REPORT (2015 Sept 1 - 2018 Feb 15) 10 April 2018 25 August 2018 IAU Ticha, J. et al. 25 August 2018 https://web.archive.org/web/20180825143250/https://www.iau.org/static/science/scientific_bodies/working_groups/97/wg-sbn-triennial-report-2015-2018.pdf dead 2010 EN65 at JPL Horizons Change "Observer Location" to @Neptune External links List of Centaurs and Scattered Disk Objects, Minor Planet Center List of Trans Neptunian Objects, Minor Planet Center 316179 316179 (316179) 2010 EN 65 316179 Category:Discoveries by David L. Rabinowitz Category:Discoveries by Suzanne W. Tourtellotte 20100307