(119070) 2001 KP77

Trans-Neptunian object September 2021 yes (119070) 2001 KP 77 #C2E0FF M. W. Buie Cerro Tololo Obs. 23 May 2001 (119070) 2001 KP 77 TNOres (4:7) 1 July 2021 (JD 2459396.5) 34 3.97 yr (1,449 d) 51.855 AU 36.095 AU 43.975 AU 0.1792 291.62 yr (106,514 d) 23.170° 0.0034 ms / day 3.3179° 22.164° 219.65° 176 km (est. at 0.09) B–R 1.720 0.319 22.8 7.0 (119070) 2001 KP 77 is a resonant trans-Neptunian object in the Kuiper belt, a circumstellar disc located in the outermost region of the Solar System. It was discovered on 23 May 2001, by American astronomer Marc Buie at the Cerro Tololo Observatory in Chile. The object is locked in a 4:7 orbital resonance with Neptune. It has a red surface color and measures approximately 176 km mi off 2 us in diameter. Discovery 2001 KP 77 was first observed near its perihelion on 23 May 2001, using the 4-meter Blanco Telescope at Cerro Tololo Inter-American Observatory in Chile. During the same night, 119069 2001 KN 77, 2001 KO 77, and 306792 2001 KQ 77 were also discovered. Besides Marc Buie, who is solely credited with the discovery of this object, the Minor Planet Electronic Circular also mentions James Elliot, Lawrence Wasserman, Robert Millis and Susan Kern as observers and measurers, respectively. Follow-up observations with the 6.5-meter Baade Telescope (Magellan) at the Las Campanas Observatory were made three weeks later. The body's observation arc begins with its official discovery observation at Cerro Tololo on 23 May 2001. Orbit and classification This minor planet orbits the Sun at a distance of 36.1–51.9 AU once every 291 years and 7 months (106,514 days; semi-major axis of 43.98 AU). Its orbit has an eccentricity of 0.18 and an inclination of 3° with respect to the ecliptic. The object came to perihelion in 2002. 2021, it is 37.0 AU from the Sun and has an apparent magnitude of 22.8. 2001 KP 77 is a resonant trans-Neptunian object that stays in a 4:7 mean-motion orbital resonance with Neptune, orbiting exactly four times the Sun for every seven orbits Neptune does. The classification is deemed secure. The 4:7 resonance is located at 43.7 AU in the midst of the classical objects of the Kuiper belt, a circumstellar disc of typically non-resonant bodies, contrary to the more prominent resonant plutinos (2:3) and twotinos (1:2) which form the inner and outer rim of the Kuiper belt, respectively. Numbering and naming This minor planet was numbered by the Minor Planet Center on 16 November 2005, receiving the number 119070 119070 in the minor planet catalog (M.P.C. 55533). 2025, it has not been named. According to the established naming conventions, it will be given a mythological name associated with the underworld or with creation. Physical characteristics This object has a red surface color, with a high B−R color index of 1.720 0.319 in the visible part of the spectrum.9 A red surface color is typically associated with the presence of tholins, polymer-like organic compounds, formed by long exposures to solar and cosmic radiation. A higher B−R magnitude of 1.980 0.229 including B−V and V−R color indices of 1.544 and 0.574, respectively, were previously published in 2004. Based on a generic magnitude-to-diameter conversion, 2001 KP 77 measures approximately 176 km mi off 2 us in diameter, for an assumed albedo of 0.9 and a magnitude of 7.0. According to Mike Brown, who estimates a mean diameter of 113 km mi on 2 us, the object is too small for being considered a dwarf planet candidate ("probably not"). As of 2021, no rotational lightcurve for this body has been obtained from photometric observations. Its rotation period, pole and shape, as well as its composition remain unknown. References 30em 2005-05-11 last obs. JPL Small-Body Database Browser: 119070 (2001 KP77) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2119070 Jet Propulsion Laboratory 11 September 2021 119070 (2001 KP77) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=119070 11 September 2021 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 11 September 2021 Naming of Astronomical Objects – Minor planets IAU – International Astronomical Union https://www.iau.org/public/themes/naming/#minorplanets 11 September 2021 31 October 2013 https://web.archive.org/web/20131031154417/https://www.iau.org/public/themes/naming/#minorplanets dead 119070 11 September 2021 N. Peixinho A. Delsanti A. Guilbert-Lepoutre R. Gafeira P. Lacerda October 2012 The bimodal colors of Centaurs and small Kuiper belt objects Astronomy and Astrophysics 546 12 2012A&A...546A..86P 10.1051/0004-6361/201219057 1206.3153 55876118 Asteroid (119070) 2001 KP77 – Ephemerides AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.3.0&n=119070 11 September 2021 List of Known Trans-Neptunian Objects Johnston's Archive 18 August 2020 http://www.johnstonsarchive.net/astro/tnoslist.html 11 September 2021 Asteroid Size Estimator CNEOS NASA/JPL https://cneos.jpl.nasa.gov/tools/ast_size_est.html 11 September 2021 Orbit Fit and Astrometric record for 119070 Southwest Research Institute https://www.boulder.swri.edu/~buie/kbo/astrom/119070.html 11 September 2021 (The Deep Ecliptic Survey Object Classifications) How many dwarf planets are there in the outer solar system? California Institute of Technology Brown Michael E. http://web.gps.caltech.edu/~mbrown/dps.html 11 September 2021 Asteroid (119070) 2001 KP77 – TNO and Centaur Colors V10.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=119070#Asteroid%20119070EAR-A-COMPIL-3-TNO-CEN-COLOR-V10.0 11 September 2021 https://web.archive.org/web/20210911223142/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=119070#Asteroid%20119070EAR-A-COMPIL-3-TNO-CEN-COLOR-V10.0 11 September 2021 dead MPEC 2002-B13 : 2001 KN77, 2001 KO77, 2001 KP77, 2001 KQ77 Minor Planet Electronic Circular Minor Planet Center 19 January 2002 https://minorplanetcenter.net//mpec/K02/K02B13.html 11 September 2021 External links MPEC 2002-F33 : 2001 KP77 (revision), Minor Planet Electronic Circular, 20 March 2002 List of Transneptunian Objects, Minor Planet Center (119070) 2001 KP77, Small Bodies Data Ferret Discovery Circumstances: Numbered Minor Planets (115001)-(120000), Minor Planet Center TNO/centaur eccentricities vs. semimajor axes and resonance objects, Johnston's Archive, 2015 119070 119070 (119070) 2001 KP 77 119070 Category:Discoveries by Marc Buie 20010523