(20161) 1996 TR66

Trans-Neptunian object October 2019 yes (20161) 1996 TR 66 #C2E0FF AnimatedOrbitOf201611996TR66.gif 8 October 1996 D. C. JewittC. TrujilloJ. X. LuuJ. Chen Mauna Kea Obs. (20161) 1996 TR 66 TNOtwotinodistant 4 September 2017 (JD 2458000.5) 4 12.04 yr (4,398 days) 66.612 AU 28.630 AU 47.621 AU 0.3988 328.63 yr (120,032 d) 55.593° 0.0030 ms / day 12.436° 343.11° 308.70° 139 km 7.5 (20161) 1996 TR 66 is a trans-Neptunian object orbiting beyond Pluto in the Kuiper belt of the outermost Solar System, approximately 139 km mi off 2 us in diameter. It was discovered on 8 October 1996, by astronomers David Jewitt, Chad Trujillo, Jane Luu, and Jun Chen at the Mauna Kea Observatory, Hawaii, in the United States. It was the first discovery of a twotino. Orbit and classification It orbits the Sun at a distance of 28.6–66.6 AU once every 328 years and 8 months (120,032 days). Its orbit has an eccentricity of 0.40 and an inclination of 12° with respect to the ecliptic. Near perihelion, it comes closer to the Sun than Neptune does (29.7 AU). It has a semi-major axis (average distance from the Sun) near the edge of the classical belt. Twotino 1996 TR 66 was the first twotino discovered. Twotinos stay in a 1:2 orbital resonance with Neptune, which means that for every one orbit a twotino makes, Neptune orbits two times. Both the Minor Planet Center and the Deep Ecliptic Survey list this trans-Neptunian object as a twotino. Numbering and naming This minor planet was numbered by the Minor Planet Center on 9 January 2001. As of 2025, it has not been named. References 2008-10-23 last obs. JPL Small-Body Database Browser: 20161 (1996 TR66) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2020161 Jet Propulsion Laboratory 26 May 2017 20161 (1996 TR66) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=20161 28 February 2017 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 24 February 2018 List of known trans-Neptunian objects johnstonsarchive http://www.johnstonsarchive.net/astro/tnoslist.html 28 February 2017 MPEC 2009-J35 :Distant Minor Planets (2009 MAY 29.0 TT) 2009-05-08 Minor Planet Center http://www.cfa.harvard.edu/mpec/K09/K09J35.html 2009-05-12 Marc W. Buie 27 November 2000 using 22 observations Orbit Fit and Astrometric record for 20161 SwRI (Space Science Department) http://www.boulder.swri.edu/~buie/kbo/astrom/20161.html 2009-05-12 External links 20161 20161 (20161) 1996 TR 66 020161 Category:Discoveries by David C. Jewitt Category:Discoveries by Chad Trujillo Category:Discoveries by Jane Luu Category:Discoveries by Jun Chen (astronomer) 19961008 020161