2005 TN53

Neptune trojan September 2020 yes 2005 TN 53 #C7FF8F 7 October 2005(discovery: first observation only) C. Trujillo S. S. Sheppard Las Campanas Obs. 2005 TN 53 Neptune trojan centaur distant 21 November 2025 (JD 2461000.5) 4 8.00 yr (2,921 days) 32.451 AU 28.154 AU 30.303 AU 0.0709 166.81 yr (60,928 days) 301.81° 0.0060 ms / day 24.989° 9.280° 85.696° 68 km (est. at 0.10) 80 km 23.7 9.0 2005 TN 53 is an inclined Neptune trojan leading Neptune's orbit in the outer Solar System, approximately 80 kilometers in diameter. It was first observed on 7 October 2005, by American astronomers Scott Sheppard and Chad Trujillo at Las Campanas Observatory in the Atacama desert of Chile. It was the third such body to be discovered, and the first with a significant orbital inclination, which showed that the population as a whole is very dynamically excited. Orbit and classification Neptune trojans are resonant trans-Neptunian objects (TNO) in a 1:1 mean-motion orbital resonance with Neptune. These trojans have a semi-major axis and an orbital period very similar to Neptune's (30.10 AU; 164.8 years). 2005 TN 53 belongs to the larger group, which leads 60° ahead Neptune's orbit. It orbits the Sun with a semi-major axis of 30.014 AU at a distance of 28.1–31.9 AU once every 164 years and 5 months (60,059 days). Its orbit has an eccentricity of 0.06 and an inclination of 25° with respect to the ecliptic. It has the same orbital period as Neptune and orbits at the Lagrangian point about 60° ahead of Neptune. It has an inclination of 25 degrees. Physical characteristics Diameter The discoverers estimate that 2005 TN 53 has a mean-diameter of 80 kilometers based on a magnitude of 23.7. Based on a generic magnitude-to-diameter conversion, it measures approximately 68 kilometers in diameter using an absolute magnitude of 9.0 and an assumed albedo of 0.10. Numbering and naming Due to its orbital uncertainty, this minor planet has not been numbered and its official discoverers have not been determined. If named, it will follow the naming scheme already established with 385571 Otrera, 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.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 References 30em 2013-10-06 last obs. JPL Small-Body Database Browser: (2005 TN53) http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3301506 Jet Propulsion Laboratory 4 August 2017 2005 TN53 Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=2005+TN53 4 August 2017 List of Neptune Trojans Minor Planet Center 10 July 2017 http://www.minorplanetcenter.org/iau/lists/NeptuneTrojans.html 4 August 2017 Asteroid Size Estimator CNEOS/JPL https://cneos.jpl.nasa.gov/tools/ast_size_est.html 2 August 2017 Scott S. Sheppard Chadwick A. Trujillo July 2006 A Thick Cloud of Neptune Trojans and Their Colors http://www.dtm.ciw.edu/users/sheppard/pub/Sheppard06NepTroj.pdf Science 313 5786 511–514.(SciHomepage) 2006Sci...313..511S 10.1126/science.1127173 16778021 35721399 20 February 2012 29 June 2010 https://web.archive.org/web/20120220141846/http://www.dtm.ciw.edu/users/sheppard/pub/Sheppard06NepTroj.pdf dead Lakdawalla Emily 2008 LC15, the first Trojan asteroid discovered in Neptune's L5 point 13 August 2010 The Planetary Society https://www.planetary.org/blogs/emily-lakdawalla/2010/2623.html 4 August 2017 External links Three New "Trojan" Asteroids Found Sharing Neptune's Orbit https://web.archive.org/web/20120220141841/http://www.dtm.ciw.edu/users/sheppard/trojans/ 20 February 2012 by Scott S. Sheppard (includes image of 2005 TN 53) u4oeJ34FkLQ Scott Sheppard and the hunt for Neptune Trojans (time 1:40 min.) AstDys-2 about 2005 TN 53 2005TN53 3301506 # Category:Minor planet object articles (unnumbered) # # Category:Discoveries at Las Campanas Observatory 20051007