(91205) 1998 US43

Plutino November 2018 yes (91205) 1998 US 43 #C2E0FF M. W. Buie Kitt Peak National Obs. 22 October 1998 (91205) 1998 US 43 TNOplutinodistant 27 April 2019 (JD 2458600.5) 4 17.29 yr (6,314 d) 44.196 AU 33.932 AU 39.064 AU 0.1314 244.16 yr (89,179 d) 66.411° 0.0040 ms / day 10.628° 223.94° 138.70° 111 km (est.)154 km (est.) 0.04 (assumed)0.09 (assumed) BB–BRB–R = 1.185B–V = 0.691R–I = 0.323V–R = 0.494 8.0 (91205) 1998 US 43 is a resonant trans-Neptunian object of the plutino group, located in the Kuiper belt in the outermost region of the Solar System. The rather bluish body measures approximately 111 km mi off 2 us in diameter. It was discovered on 22 October 1998, by American astronomer Marc Buie at the Kitt Peak National Observatory in the United States. Classification and orbit 1998 US 43 belongs to the plutino population, a large population of resonant trans-Neptunian objects named after the group's largest member, Pluto. Thus, 1998 US 43 is in a 2:3 orbital resonance with Neptune, orbiting the Sun twice for every three times Neptune does. It orbits the Sun with a semi-major axis of 39.06 AU, a perihelion of 33.9 AU, and an aphelion of 44.2 AU, completing an orbit once every 244 years and 2 months (89,179 days). Its orbit has an eccentricity of 0.13 and an inclination of 11° with respect to the ecliptic. The body's observation arc begins with its official discovery observation. Its orbit still has a fair amount of uncertainty. Numbering and naming This minor planet was numbered by the Minor Planet Center on 28 October 2004 (M.P.C. 52912). As of 2025, it has not been named. Physical characteristics Based on an absolute magnitude of 8.0 and an assumed albedo of 0.09, Johnston's Archive estimates a diameter of 111 kilometers. The body's spectrum (BB–BR) suggests a somewhat bluish color. As of 2018, no rotational lightcurve of 1998 US 43 has been obtained from photometric observations. 1998 US 43 is an unlikely dwarf planet candidate due to its small size, estimated by Michael Brown to measure 154 kilometers with a low albedo of 0.04. References 30em 2016-02-04 last obs. JPL Small-Body Database Browser: 91205 (1998 US43) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2091205 Jet Propulsion Laboratory 19 November 2018 91205 (1998 US43) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=91205 19 November 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 19 November 2018 List of Known Trans-Neptunian Objects Johnston's Archive 7 October 2018 http://www.johnstonsarchive.net/astro/tnoslist.html 19 November 2018 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 19 November 2018 Asteroid (91205) 1998 US43 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=91205 19 November 2018 https://web.archive.org/web/20181119051619/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=91205 19 November 2018 dead 91205 13 October 2017 External links List Of Transneptunian Objects, Minor Planet Center List of Known Trans-Neptunian Objects, Johnston's Archive Discovery Circumstances: Numbered Minor Planets (90001)-(95000) – Minor Planet Center 91205 (91133) 1998 HK151 91205 (91205) 1998 US 43 95179 Berkó 091205 Category:Discoveries by Marc Buie 19981022