2014 UZ224

Scattered disc object February 2018 yes possible dwarf planet 2014 UZ 224 2014UZ224-ALMA.jpg 2014 UZ 224 imaged by ALMA David Gerdes et al. Cerro Tololo Obs. 21 October 2014 2014 UZ 224 "DeeDee" (nickname) TNOSDO 05 May 2025 (JD 2460800.5) 4 15.98 yr (5,836 days) 15 October 2006 181.17 0.23 AU 38.695 0.011 AU 23 April 2142 ±26 days 109.93 0.14 AU 0.648 1152.6 2.2 yr (421000 820 days) 323.47 0.09° 0.00086 ms / day 26.7787° 131.133 0.003° 28.55 0.03° 37.5405 AU 33.2245 AU 6.285 0 635 57 62 km 0.0266 -3 Earth mass (est.) 0.131 0.038 0.028 30 K g–r 0.77 0.11r–i 0.39 0.07i-z 0.22 0.16 23.38 0.05 (V)<ref name="Gerdes2017" / 22.98 0.04 (r) 3.5 3.48 (JPL) 2014 UZ 224 is a large trans-Neptunian object and possible dwarf planet orbiting in the scattered disc of the outermost regions of the Solar System, estimated to be around 550 to 700 km (350 to 450 mile) in diameter. 2021, it is approximately 89.7 AU e9km unit on from the Sun, and will slowly decrease in distance until it reaches its perihelion of 38 AU in 2142. The discoverers have nicknamed it "DeeDee" for "Distant Dwarf".Scoles Sarah 18 October 2016 Soon you won't care about a newly discovered dwarf planet https://www.wired.com/2016/10/dwarf-planets-arent-big-news-astronomy-great-job Wired 1059-10282016-10-14 New dwarf planet solar system's 2nd most distant https://news.umich.edu/new-dwarf-planet-solar-system-s-2nd-most-distant/ 2025-08-15 University of Michigan News en-US 2014 UZ 224 was discovered by a team led by David Gerdes using data collected by the large camera Dark Energy Camera (DECam).https://www.scientificamerican.com/article/new-dwarf-planet-found-in-our-solar-system/ New Dwarf Planet Found in Our Solar System Cofield Calla 12 October 2016 Scientific American 2016-10-12 Palca Joe https://www.npr.org/sections/thetwo-way/2016/10/11/497071139/a-friend-for-pluto-astronomers-find-new-dwarf-planet-in-our-solar-system A Friend for Pluto: Astronomers Find New Dwarf Planet in Our Solar System NPR.org 11 October 2016 The discovery was announced by the Minor Planet Center on 11 October 2016. Assuming its nominal diameter of 635 km mi on, it reflects just 13 percent of the sunlight that hits it. The earliest known precovery observations of 2014 UZ 224 were taken at the Mauna Kea Observatory on 15 October 2006. 2014 UZ 224 has not yet been imaged by high-resolution telescopes, so it has no known moons. The Hubble Space Telescope is planned to image 2014 UZ 224 in 2026, which should determine if it has any significantly sized moons. Orbit thumb|left|Discovery images of 2014 UZ 224 by DECam from 21 and 23 October 2014 thumb|left|Diagram showing the orbits of 2014 UZ 224 (gray) and the outer planets. The vertical gray lines along 2014 UZ 224's orbit mark its vertical positions above and below the ecliptic plane. 2014 UZ 224 orbits the Sun once every approximately 1,150 yearsAsteroid 2014 UZ224 Space Reference 2006-10-15 https://www.spacereference.org/asteroid/2014-uz224 2026-08-19 and at the current point in its orbit is the second farthest known object from the Sun with a stable orbit. Its perihelion is calculated to be a bit closer than Pluto's semi-major axis, and it is calculated to reach it in 2142. Orbital stability Gerdes et al. simulated 100000 clones of the orbit of 2014 UZ 224 for 1 billion years (1 Gyr). It remains close to its orbit over the time of the simulations and does not undergo libration, even with the potentially destabilizing interactions with Neptune, and being in possibly a 7:1 mean-motion resonance with Neptune. They also performed several simulations of the entire 4.5 Gyr history of the Solar System, and remained stable. In a 2021 study by Muñoz-Gutiérrez et al. analyzed and simulated the orbit of 2014 UZ 224 over a period of 1 Gyr. They simulated that 2014 UZ 224's orbital stability is unstable over a time scale of 1 Gyr, however they calculate a diffusion time of 55.069 Gyr, making it very stable. Physical characteristics Diameter, mass and albedo 200px|thumb|Size comparison of Pluto and 2014 UZ 224 2014 UZ 224 has a measured diameter of 635 57 62 km, using optical measurements, and using thermal measurements from the Atacama Large Millimeter Array in the Atacama Desert of northern Chile. They assume a spherical body, and a uniform surface for this diameter. 2014 UZ 224 has no measured mass, due to it not having a known moon as of 2026, however Muñoz-Gutiérrez et al. estimates a mass of 0.0266 -3 Earth mass (1.58861 20 kg). Interior Gerdes et al. states that 2014 UZ 224 is likely a dwarf planet with a mixed ice-rock composition. However, a planetary study by William M. Grundy and others suggests that trans-Neptunian objects in the 400–1000 km size range form a transition zone between small, low-density bodies and large, dense dwarf planets. Since 2014 UZ 224 has an diameter of 635 57 62 km, it falls in this transition zone. Surface and spectra 2014 UZ 224 has color indices of: g-r of 0.77 0.11; r-i of 0.39 0.07; i-z of 0.22 0.16, with a geometric albedo of 0.131 0.038 0.028. Using the diameter of 635 57 62 km, they assume a uniform surface for the diameter. 2014 UZ 224 has a surface temperature of about 30 K °C as of 2017. Numbering and naming As of 2025, 2014 UZ 224 has not been numbered by the Minor Planet Center, as the uncertainty of its orbit is still large. The discoverers will have sole right to propose a name for ten years from the date it is numbered. See also List of Solar System objects most distant from the Sun References last observation: 2022-10-07; arc: 15.98 years JPL Small-Body Database Browser: (2014 UZ224) http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2014UZ224 Jet Propulsion Laboratory 2025-08-21 W. M. Grundy K. S. Noll M. W. Buie S. D. Benecchi D. Ragozzine H. G. Roe The Mutual Orbit, Mass, and Density of Transneptunian Binary Gǃkúnǁʼhòmdímà ((229762) 2007 UK 126) https://ntrs.nasa.gov/api/citations/20190001806/downloads/20190001806.pdf Icarus December 2019 334 30–38 10.1016/j.icarus.2018.12.037 2019Icar..334...30G 126574999 19 June 2026 MPEC MPEC 2016-T104 : 2014 UZ224 IAU Minor Planet Center 2016-10-11 http://www.minorplanetcenter.net/mpec/K16/K16TA4.html 2016-10-11 (K14UM4Z) 2014 UZ224 http://www.minorplanetcenter.net/db_search/show_object?object_id=2014+UZ224 2021-01-05 Minor Planet Center International Astronomical Union Discovery and Physical Characterization of a Large Scattered Disk Object at 92 AU etal D. W. Gerdes M. Sako S. Hamilton K. Zhang T. Khain J. C. Becker April 2017 The Astrophysical Journal Letters 839 1 7 10.3847/2041-8213/aa64d8 1702.00731 2017ApJ...839L..15G 35694455 free A Search For The Moons of Mid-Sized TNOs https://www.stsci.edu/hst-program-info/download/hst/pdf/18010/ Benjamin Proudfoot Mikulski Archive for Space Telescopes Space Telescope Science Institute August 2025 HST Proposal 18010 Cycle 33 2025-08-17 Muñoz-Gutiérrez Marco A. Peimbert Antonio Lehner Matthew J. Wang 王 Shiang-Yu 祥宇 Long-term Dynamical Stability in the Outer Solar System. I. The Regular and Chaotic Evolution of the 34 Largest Trans-Neptunian Objects The Astronomical Journal 162 4 2021-10-01 0004-6256 10.3847/1538-3881/ac1102 free 164 2107.00240 2021AJ....162..164M Plait Phil Distant solar system object 2014 UZ224 is not terribly big but at least it's really really cold SYFY 2017-04-13 https://www.syfy.com/syfy-wire/distant-solar-system-object-2014-uz224-is-not-terribly-big-but-at-least-its-really-really 2026-10-08 External links 2014 UZ224 ("DeeDee") Fact Sheet 2014UZ224 3760651 # Category:Minor planet object articles (unnumbered) # 20140819