(42301) 2001 UR163

Trans-Neptunian object July 2021 yes (42301) 2001 UR 163 #C2E0FF 42301-2001ur163 hst.jpg Hubble Space Telescope image of 2001 UR 163 taken in 2005 DES Kitt Peak National Obs. 21 October 2001 (42301) 2001 UR 163 TNO4:9 resdistant 1 July 2021 (JD 2459396.5) 2 38.45 yr (14,045 d) 66.643 AU 36.987 AU 51.815 AU 0.2862 372.98 yr (136,232 d) 80.814° 0.0026 ms / day 0.7531° 301.39° 8 October 1937 344.50° 0 352 85 km26 0.209 0.08 RR-U (very red) B–V 1.25 0.11 V–R 0.88 0.06 V–I 1.54 0.16 21.3 4.21 (42301) 2001 UR 163 is a resonant trans-Neptunian object located in the outermost region of the Solar System. The object measures approximately 352 km mi off us 2 in diameter with a high albedo and stays in an uncommon orbital resonance (4:9) with Neptune. It was discovered on 21 October 2001 by astronomers of the Deep Ecliptic Survey program at Kitt Peak National Observatory near Tucson, Arizona, United States. Classification and orbit 2001 UR 163 orbits the Sun at a distance of 37.0–66.6 AU once every 372 years and 12 months (136,232 days; semi-major axis of 51.82 AU). Its orbit has an eccentricity of 0.29 and an inclination of 1° with respect to the ecliptic. It came to perihelion on 8 October 1937, and has since been moving away from the Sun. In 2006, it moved beyond a distance of 50 AU and is at 53.7 AU 2021 y. The body's observation arc begins with a precovery, published by the Digitized Sky Survey and taken at the Siding Spring Observatory in July 1982. Numbering and naming 2001 UR 163 was numbered (42301) by the Minor Planet Center on 26 May 2002 (M.P.C. 45686). 2025, it has not been named. According to the established naming conventions, it will receive a mythological or mythic name (not necessarily from Classical mythology). Physical characteristics Lightcurve analysis shows only small deviations, suggesting that 2001 UR 163 is a spheroid with small albedo spots. Observations with Spitzers Infrared Array Camera were used to study the body's surface composition. The analyzed data indicate the presence of 20% water ice, 60% amorphous silicates, and 20% organic compounds, including complex ones such as tholins.20 Diameter and albedo 2001 UR 163 measures approximately 352 km mi off us 2 in diameter with a high albedo of 0.209.26 Based on previous estimates published on the Lightcurve Data Base and on Michael Brown's website, 2001 UR 163 measures between 531 km mi on us 2 and 583 km mi off us 2, using an assumed intermediate surface albedo of 0.09 to 0.10 with an absolute magnitude of 4.49 and 4.4, respectively. References 30em 2021-01-08 last obs. JPL Small-Body Database Browser: 42301 (2001 UR163) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2042301 Jet Propulsion Laboratory 27 July 2021 42301 (2001 UR163) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=42301 27 July 2021 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 27 July 2021 Naming of Astronomical Objects – Minor planets IAU – International Astronomical Union https://www.iau.org/public/themes/naming/#minorplanets 27 July 2021 31 October 2013 https://web.archive.org/web/20131031154417/https://www.iau.org/public/themes/naming/#minorplanets dead Tancredi Gonzalo Favre Sofía June 2008 Which are the dwarfs in the Solar System? Icarus 195 2 851–862 http://www.lpi.usra.edu/meetings/acm2008/pdf/8261.pdf 2008Icar..195..851T 0019-1035 10.1016/j.icarus.2007.12.020 How many dwarf planets are there in the outer solar system? (updates daily) California Institute of Technology Michael E. Brown Michael E. Brown http://web.gps.caltech.edu/~mbrown/dps.html 31 August 2016 List of Known Trans-Neptunian Objects Johnston's Archive 18 August 2020 Johnston, Wm. Robert http://www.johnstonsarchive.net/astro/tnoslist.html 27 July 2021 14 November 2001 MPEC 2001-V57: 2001 QX322, 2001 UR163, 2001 VN71 Brian G. Marsden IAU – Minor Planet Center Minor Planet Electronic Circulars http://www.cfa.harvard.edu/mpec/K01/K01V57.html dead https://web.archive.org/web/20100411021530/http://www.cfa.harvard.edu/mpec/K01/K01V57.html 11 April 2010 (K01UG3R*) Orbit Fit and Astrometric record for 42301 Marc W. Buie Marc Buie SwRI–Southwest Research Institute https://www.boulder.swri.edu/~buie/kbo/astrom/42301.html 27 July 2021The Deep Ecliptic Survey Object Classifications Asteroid (42301) 2001 UR163 – Ephemerides AstDyS-2, Asteroids – Dynamic Site, Department of Mathematics, University of Pisa https://newton.spacedys.com/astdys/index.php?pc=1.1.3.0&n=42301 27 July 2021 42301 27 July 2021 Irina N. Belskaya Maria A. Barucci Marcello Fulchignoni Anatolij N. Dovgopol April 2015 Updated taxonomy of trans-neptunian objects and centaurs: Influence of albedo Icarus 250 482–491 2015Icar..250..482B 10.1016/j.icarus.2014.12.004 6 Fernández-Valenzuela E. Pinilla-Alonso N. Stansberry J. Emery J. P. Perkins W. Van Laerhoven C. Gladman B. J. Fraser W. C. Cruikshank D. Lellouch E. Müller T. G. Grundy W. M. Trilling D. Fernandez Y. Dalle Ore C. February 2021 Compositional Study of Trans-Neptunian Objects at λ > 2.2 μm The Planetary Science Journal 2 1 10 2021PSJ.....2...10F 2632-3338 10.3847/PSJ/abc34e 2011.07121 234003733 free External links List Of Centaurs and Scattered-Disk Objects, Minor Planet Center The Meudon Multicolor Survey (2MS) of Centaurs and Trans-Neptunian objects TNO Colors KBO Surface Colors Red Planetoid Sedna covered in tar-colored sludge Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Discovery Circumstances: Numbered Minor Planets (40001)-(45000), Minor Planet Center (42301) 2001 UR 163, Small Bodies Data Ferret 42301 42301 (42301) 2001 UR 163 Category:Trans-Neptunian objects in a 4:9 resonance Category:Discoveries by the Deep Ecliptic Survey 20011021