(82158) 2001 FP185

Trans-Neptunian object October 2019 yes (82158) 2001 FP 185 #C2E0FF Η τροχιά του (82158) 2001 FP185.gif 26 March 2001 M. W. Buie Kitt Peak National Obs. (82158) 2001 FP 185 TNOSDOdistant 4 September 2017 (JD 2458000.5) 2 16.25 yr (5,937 days) 420.18 AU 34.280 AU 227.23 AU 0.8491 3425.31 yr (1,251,096 days) 1.4289° 0.0003 ms / day 30.763° 179.31° 7.1638° 0 222.59 km (derived)332 31 km336 km (radiometric) 0.046 0.0070.05 (radiometric)0.10 (assumed) Prominent water (H 2 O/"bowl" type)5IRCB–R = 1.38B–V = 0.860 0.0400.820 0.0480.820 0.020V–R = 0.520 0.0400.572 0.0380.580 0.020V–I = 1.070 0.0601.013 0.0721.060 0.010 5.94 0.03 (R)5.940 0.053 (R)6.26.386.4 (82158) 2001 FP 185 is a highly eccentric trans-Neptunian object from the scattered disc in the outermost part of the Solar System, approximately 330 kilometers in diameter. It was discovered on 26 March 2001, by American astronomer Marc Buie at Kitt Peak National Observatory in Arizona, United States. Orbit and classification 2001 FP 185 is a scattered-disc object which belong to the most distant and coldest objects in the Solar System and are thought to be source of most periodic comets. It orbits the Sun at a distance of 34.3–420.2 AU once every 3425 years and 4 months (1,251,096 days). Its orbit has an eccentricity of 0.85 and an inclination of 31° with respect to the ecliptic. A first precovery was taken by the Sloan Digital Sky Survey in March 1999, extending the body's observation arc by 2 years prior to its official discovery observation at Kitt Peak. Planet Nine co-orbital If a massive trans-Neptunian object exists, such as the hypothetical Planet Nine, 2001 FP 185 may be co-orbital with it. Physical characteristics Spectra and colors 2001 FP 185's color has extensively been measured. The object has a determined BR and IR spectra, which are intermediate classes of the very blue BB and very red RR spectra. Diameter and albedo According to astronomer Michael Brown and based on radiometric observations, 2001 FP 185 measures 336 kilometers in diameter and its surface has an (assumed) albedo of 0.05. Observations with the PACS-instrument of the Herschel Space Observatory during a survey of scattered-disc objects ("TNO are cool") found a similar diameter of 332 kilometer with an albedo of 0.046. The Collaborative Asteroid Lightcurve Link assumes a higher albedo of 0.10 and consequently derives a much shorter diameter of 222 kilometers based on an absolute magnitude of 6.38. Lightcurve No rotational lightcurve of 2001 FP 185 has been obtained from photometric observations. The body's rotation period, pole axis and brightness amplitude remains unknown. Numbering and naming This minor planet was numbered by the Minor Planet Center on 4 May 2004. As of 2025, it has not been named. See also List of Solar System objects by greatest aphelion References 2015-06-22 last obs. JPL Small-Body Database Browser: 82158 (2001 FP185) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2082158 Jet Propulsion Laboratory 2 August 2017 82158 (2001 FP185) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=82158 2 August 2017 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 24 February 2018 C. de la Fuente Marcos R. de la Fuente Marcos September 2014 Extreme trans-Neptunian objects and the Kozai mechanism: signalling the presence of trans-Plutonian planets Monthly Notices of the Royal Astronomical Society: Letters 443 1 L59–L63 2014MNRAS.443L..59D 10.1093/mnrasl/slu084 free 1406.0715 118622180 Carlos de la Fuente Marcos Raú de la Fuente Marcos l Sverre J. Aarseth January 2015 Flipping minor bodies: what comet 96P/Machholz 1 can tell us about the orbital evolution of extreme trans-Neptunian objects and the production of near-Earth objects on retrograde orbits Monthly Notices of the Royal Astronomical Society 446 2 1867–1873 2015MNRAS.446.1867D 10.1093/mnras/stu2230 free 1410.6307 119256764 List of Known Trans-Neptunian Objects Johnston's Archive 22 July 2017 http://www.johnstonsarchive.net/astro/tnoslist.html 2 August 2017 How many dwarf planets are there in the outer solar system? Mike Brown http://web.gps.caltech.edu/~mbrown/dps.html 2 August 2017 82158 2 August 2017 6 P. Santos-Sanz E. Lellouch S. Fornasier C. Kiss A. Pal T. G. Müller E. Vilenius J. Stansberry M. Mommert A. Delsanti M. Mueller N. Peixinho F. Henry J. L. Ortiz A. Thirouin S. Protopapa R. Duffard N. Szalai T. Lim C. Ejeta P. Hartogh A. W. Harris M. Rengel May 2012 "TNOs are Cool": A survey of the trans-Neptunian region. IV. Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel-PACS Astronomy and Astrophysics 541 18 2012A&A...541A..92S 10.1051/0004-6361/201118541 1202.1481 118600525 W. Romanishin S. C. Tegler December 2005 Accurate absolute magnitudes for Kuiper belt objects and Centaurs Icarus 179 2 523–526 2005Icar..179..523R 10.1016/j.icarus.2005.06.016 David Jewitt Nuno Peixinho Henry H. Hsieh November 2007 U-Band Photometry of Kuiper Belt Objects The Astronomical Journal 134 5 2046–2053 2007AJ....134.2046J 10.1086/522787 free 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 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 O. R. Hainaut H. Boehnhardt S. Protopapa October 2012 Colours of minor bodies in the outer solar system. II. A statistical analysis revisited Astronomy and Astrophysics 546 20 2012A&A...546A.115H 10.1051/0004-6361/201219566 1209.1896 54776793 etal Noemí Pinilla-Alonso Rosario Brunetto Mário N. De Prá Bryan J. Holler Elsa Hénault Ana Carolina de Souza Feliciano A JWST/DiSCo-TNOs portrait of the primordial Solar System through its trans-Neptunian objects https://hal.science/hal-04961629v1/file/s41550-024-02433-2.pdf Nature Astronomy December 2024 9 2 230–244 10.1038/s41550-024-02433-2 2025NatAs...9..230P 274932942 External links List Of Centaurs and Scattered-Disk Objects, Minor Planet Center Discovery Circumstances: Numbered Minor Planets (80001)-(85000) – Minor Planet Center 82158 82158 (82158) 2001 FP 185 082158 082158 Category:Discoveries by Marc Buie 20010326