(184212) 2004 PB112

Trans-Neptunian object July 2021 yes (184212) 2004 PB 112 #C2E0FF M. W. Buie Cerro Tololo Obs. 13 August 2004 (184212) 2004 PB 112 TNOSDOres 4:27 1 July 2021 (JD 2459396.5) 30 17.07 yr (6,236 d) 184.60 AU 35.333 AU 109.97 AU 0.6787 1153.20 yrs 3.0647° 0.0009 ms / day 15.403° 356.73° 3.6578° 154 km (est. at 0.09) 7.3 (184212) 2004 PB 112 is a trans-Neptunian object from the scattered disc, approximately 154 km mi off us 2 in diameter, and in a rare high-order orbital resonance ratio (4:27) with Neptune. It was discovered on 13 August 2004, by American astronomer Marc Buie at the Cerro Tololo Inter-American Observatory in Chile. Orbit and classification 2004 PB 112 orbits the Sun at a distance of 35.3–184.6 AU once every 1153 years and 2 months (421,205 days; semi-major axis of 109.97 AU). Its orbit has a high eccentricity of 0.68 and an inclination of 15° with respect to the ecliptic. A first precovery was taken at Cerro Tololo in 2000, extending the body's observation arc by 4 years prior to its official discovery observation. 2004 PB 112 reached perihelion on 5 October 2011 (JD 2455839.806). It has been classified as a highly unusual 4:27 resonant trans-Neptunian object,49 but also simply as a scattered disc object, or SCATNEAR, respectively, by the Deep Ecliptic Survey. Numbering and naming This minor planet was numbered (184212) by the Minor Planet Center on 20 April 2008 (M.P.C. 62608). 2025, it has not been named. Physical characteristics Based on a generic conversion from an absolute magnitude of 7.2, 2004 PB 112 measures between 100 and 220 kilometer in diameter. Johnston's Archive estimates a mean diameter of 154 km mi off us 2 assuming a typical albedo of 0.09. References 2008-10-30 last obs. JPL Small-Body Database Browser: 184212 (2004 PB112) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2184212 Jet Propulsion Laboratory 1 June 2017 184212 (2004 PB112) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=184212 24 April 2017 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 24 July 2021 List of Known Trans-Neptunian Objects Johnston's Archive 18 August 2020 Johnston Wm. Robert http://www.johnstonsarchive.net/astro/tnoslist.html 24 July 2021 Orbit Fit and Astrometric record for 184212 Southwest Research Institute https://www.boulder.swri.edu/~buie/kbo/astrom/184212.html 5 January 2019The Deep Ecliptic Survey Object Classifications Asteroid Size Estimator CNEOS NASA/JPL https://cneos.jpl.nasa.gov/tools/ast_size_est.html 24 July 2021 Brett Gladman Brian G. Marsden Christa VanLaerhoven Nomenclature in the Outer Solar System http://www.lpi.usra.edu/books/ssbn2008/7002.pdf PDF 24 April 2017 External links List Of Centaurs and Scattered-Disk Objects, Minor Planet Center Lightcurve Database Query (LCDB), at www.minorplanet.info Discovery Circumstances: Numbered Minor Planets (180001)-(185000) – Minor Planet Center 184212 184212 (184212) 2004 PB 112 184212 Category:Discoveries by Marc Buie 20040813