(505478) 2013 UT15

Extreme trans-Neptunian object March 2018 yes (505478) 2013 UT 15 #C2E0FF OSSOS Mauna Kea Obs. 2 August 2013 (505478) 2013 UT 15 o3L83 TNOSDOdetacheddistant 4 September 2017 (JD 2458000.5) 4 4.08 yr (1,489 days) 347.97 AU 43.853 AU 195.91 AU 0.7762 2742.19 yr (1,001,586 days) 353.50° 0.0004 ms / day 10.682° 191.97° 252.40° 243 km estimate)260 km (est. at 0.08)340 km estimate) 0.04 (estimate)0.09 (assumed) BB (estimate) 6.29516.4 (505478) 2013 UT 15 is an extreme trans-Neptunian object from the scattered disc, located in the outermost regions of the Solar System, approximately 260 km mi off us in diameter. It was discovered on 2 August 2013, by astronomers of the Outer Solar System Origins Survey at Mauna Kea Observatory, Hawaii, United States. Orbit With a semi-major axis of 196 AU, 2013 UT 15 orbits the Sun at a distance of 43.9–348 AU once every 2,742 years. Its orbit has an eccentricity of 0.78 and an inclination of 11° with respect to the ecliptic. It has a similar orbit to (148209) 2000 CR 105, except for a smaller inclination. 2013 UT 15 belongs to a small number of detached objects with perihelion distances of 30 AU or more, and semi-major axes of 150 AU or more.minorplanetcenter.net: q>30, a>150 Such objects can not reach such orbits without some perturbing object, which leads to the speculation of Planet Nine. Physical characteristics Spectral type The object is estimated to have a bluish spectra (BB). Diameter 2013 UT 15 has been estimated to measure 243 and 340 kilometers in diameter, based on an assumed albedo of 0.09 and 0.04, respectively. A generic magnitude-to-diameter conversion gives a mean-diameter of 260 kilometers, using a typical albedo of 0.08 and a published absolute magnitude of 6.2951. Numbering and naming 2013 UT 15 was numbered (505478) by the Minor Planet Center on 4 November 2017 (M.P.C. 107067). As of 2025, this minor planet has not received a name. References 30em 2017-08-30 last obs. JPL Small-Body Database Browser: 505478 (2013 UT15) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2505478 Jet Propulsion Laboratory 10 November 2017 505478 (2013 UT15) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=505478 10 November 2017 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 10 November 2017 List of Known Trans-Neptunian Objects Johnston's Archive Wm. Robert Johnston 15 October 2017 http://www.johnstonsarchive.net/astro/tnoslist.html 10 November 2017 How many dwarf planets are there in the outer solar system? Gps.caltech.edu http://web.gps.caltech.edu/~mbrown/dps.html 10 November 2017 Asteroid Size Estimator CNEOS – NASA/JPL https://cneos.jpl.nasa.gov/tools/ast_size_est.html 9 November 2017 etal Shankman Cory OSSOS. VI. Striking Biases in the Detection of Large Semimajor Axis Trans-Neptunian Objects https://pure.qub.ac.uk/portal/en/publications/ossos-vi-striking-biases-in-the-detection-of-large-semimajor-axis-transneptunian-objects(027b7a9c-a171-42b4-9449-9355b0a255d4).html 2017 The Astronomical Journal 154 2 50 10.3847/1538-3881/aa7aed 1706.05348 2017AJ....154...50S 10150/625487 3535702 free External links MPEC 2017-M21 : 2013 UT15 Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR https://web.archive.org/web/20160729213840/http://obswww.unige.ch/~behrend/page_cou.html 29 July 2016 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (505001)-(510000) – Minor Planet Center 505478 2505478 505478 (505478) 2013 UT 15 505478 505478 505478 20130802