(315530) 2008 AP129

Trans-Neptunian object October 2019 yes (315530) 2008 AP 129 #C2E0FF M. E. SchwambM. E. Brown Palomar Obs. 11 January 2008 (315530) 2008 AP 129 TNOcubewano(?)Extendeddistant 2 February 2023 (JD 2460000.5) 2 33.46 yr (12,220 days) 9 October 1989 47.503 AU 35.837 AU 41.670 AU 0.1400 268.99 yr (98,249 d) 57.045° 0.0037 ms / day 27.458° 14.757° 56.567° 460.81 km (calculated)486 km494 km 9.04 0.02 h 0.07 (assumed)0.09 (assumed)0.10 (assumed) C (assumed) 4.815.1 (315530) 2008 AP 129 is a trans-Neptunian object and possibly a cubewano from the outermost regions of the Solar System, approximately 480 kilometers in diameter. It was discovered on 11 January 2008, by American Michael E. Brown and Megan Schwamb at Palomar Observatory in California. Description 2008 AP 129 orbits the Sun at a distance of 35.8–47.5 AU once every 267 years and 11 months (98,249 days; semi-major axis of 41.70 AU). Its orbit has an eccentricity of 0.14 and an inclination of 27° with respect to the ecliptic. It has 3 precovery observations back to 1989. Lightcurve analysis gave an ambiguous rotation period of 9.04 hours with a brightness amplitude of 0.12 magnitude (U=2). 2008 AP 129 has been identified as a member of the Haumea family in a dynamical study led by Proudfoot and Ragozzine in 2019.Modeling the Formation of the Family of the Dwarf Planet Haumea Benjamin Proudfoot Darin Ragozzine The Astronomical Journal May 2019 157 6 230 1904.00038 10.3847/1538-3881/ab19c4 2019AJ....157..230P 90262136 free Origin Haumea family Based on their common pattern of infrared water-ice absorption and the clustering of their orbital elements, the other KBOs, it appear to be collisional fragments broken off the dwarf planet Haumea. The neutral color of the spectrum of these objects in the visible range evidences a lack of complex organics on the surface of these bodies that has been studied in detail for the surface of Haumea.August 2023 Numbering and naming This minor planet was numbered by the Minor Planet Center on 7 February 2012. As of 2025, it has not been named. References 30em 2023-03-25 last obs. JPL Small-Body Database Browser: 315530 (2008 AP129) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=2315530 Jet Propulsion Laboratory 28 June 2023 315530 (2008 AP129) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=315530 28 June 2023 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 25 February 2018 List of Known Trans-Neptunian Objects Johnston's Archive 15 October 2017 Johnston, Wm. Robert http://www.johnstonsarchive.net/astro/tnoslist.html 16 November 2017 How many dwarf planets are there in the outer solar system? California Institute of Technology Michael E. Brown http://web.gps.caltech.edu/~mbrown/dps.html 30 July 2017 315530 9 December 2017 Audrey Thirouin Scott S. Sheppard Keith S. Noll Nicholas A. Moskovitz Jose Luis Ortiz Alain Doressoundiram June 2016 Rotational Properties of the Haumea Family Members and Candidates: Short-term Variability. The Astronomical Journal 151 6 20 2016AJ....151..148T 10.3847/0004-6256/151/6/148 1603.04406 118510175 free Marc W. Buie Marc W. Buie Orbit Fit and Astrometric record for 315530 SwRI (Space Science Department) http://www.boulder.swri.edu/~buie/kbo/astrom/315530.html 2018-02-18 External links List of Known Trans-Neptunian Objects, Johnston's Archive Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Dictionary of Minor Planet Names, Google books Discovery Circumstances: Numbered Minor Planets (315001)-(320000) – Minor Planet Center 315530 315530 (315530) 2008 AP 129 315530 315530 Category:Discoveries by Michael E. Brown Category:Discoveries by Megan E. Schwamb 20080111