(309239) 2007 RW10

Minor planet and quasi-satellite of Neptune yes #C2E0FF (309239) 2007 RW 10 PDSSS 9 September 2007 TNONept. co-orbitalcentaurdistant 23 March 2018 (JD 2458200.5) 30.17878 AU Tm on 21.06436 AU Tm on 39.28320 AU Tm on on 0.30201 165.79 yr (60555.1 d) 36.15744° 187.06355° 95.64947° 71.52911° 0 247 30 kmSantos-Sanz, P., Lellouch, E., Fornasier, S., Kiss, C., Pal, A., Müller, T. G., Vilenius, E., Stansberry, J., Mommert, M., Delsanti, A., Mueller, M., Peixinho, N., Henry, F., Ortiz, J. L., Thirouin, A., Protopapa, S., Duffard, R., Szalai, N., Lim, T., Ejeta, C., Hartogh, P., Harris, A. W., & Rengel, M. (2012). "TNOs are Cool": A Survey of the Transneptunian Region IV - Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel Space Observatory-PACS Prominent water (H 2 O/"bowl" type)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 2749329426 6.6 0.083 +0.068 -0.039 0.005944885 ms / day 10693 days (29.28 yr) 2 20.2499 AU Tm on 17.1323 AU Tm on 3.880 (309239) 2007 RW 10 is a temporary quasi-satellite of Neptune. Observed from Neptune, it would appear to revolve around it over one Neptunian year but in reality, it orbits the Sun, not Neptune. Discovery, orbit and physical properties 2007 RW 10 was discovered by the Palomar Distant Solar System Survey on September 9, 2007, Discovery MPEC https://www.minorplanetcenter.net/mpec/K07/K07X06.html 2012-07-26 Properties of the Distant Kuiper Belt: Results from the Palomar Distant Solar System Survey Schwamb, Megan E. etal September 2010 The Astrophysical Journal 720 2 1691–1707 2010ApJ...720.1691S 10.1088/0004-637X/720/2/1691 free 1007.2954 with precovery images from 1988 (also taken at Palomar).https://minorplanetcenter.net/db_search/show_object?utf8=%E2%9C%93&object_id=309239 (309239) = 2007 RW10 2018-08-25 At the time of discovery, this minor body was believed to be a Neptune trojan,Distant EKOs, 55 http://www.boulder.swri.edu/ekonews/issues/past/n055/html/index.html 2012-07-24 but it is no longer listed as such.Distant EKOs 56 http://www.boulder.swri.edu/ekonews/issues/past/n056/html/index.html 2012-07-24Minor Planet Center List Of Neptune Trojans (2007-12-01) The Jet Propulsion Laboratory classifies 2007 RW 10 as trans-Neptunian object but the Minor Planet Center includes the object among centaurs. It moves in an orbit with an inclination of 36.2°, a semi-major axis of 30.18 AU, and an eccentricity of 0.3020.JPL Small-Body Database Browser: 2007 RW10 https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007RW10 2018-08-25 Herschel-PACS observations indicate that it has a diameter of 247 km. Quasi-satellite dynamical state and orbital evolution 2007 RW 10 is currently following a quasi-satellite loop around Neptune.de la Fuente Marcos C. de la Fuente Marcos R. (309239) 2007 RW10: a large temporary quasi-satellite of Neptune Astronomy and Astrophysics Letters 545 L9 2012 10.1051/0004-6361/201219931 1209.1577 2012A&A...545L...9D 118374080 It has been a quasi-satellite of Neptune for about 12,500 years and it will remain in that dynamical state for around another 12,500 years. Prior to the quasi-satellite dynamical state, 2007 RW 10 was an trojan and it will return to this state soon after leaving its current quasi-satellite orbit. Its orbital inclination is the largest among known Neptune co-orbitals. It is also possibly the largest known object trapped in the 1:1 mean-motion resonance with any major planet. Origin 2007 RW 10 is a dynamically hot (both high eccentricity and inclination) object that is unlikely to be a primordial Neptune co-orbital. It probably originated well beyond Neptune and was later temporarily captured in the 1:1 resonance with Neptune.Horner J. Lykawka P. S. Bannister M. T. Francis P. 2008 LC18: a potentially unstable Neptune Trojan Monthly Notices of the Royal Astronomical Society 2012 422 3 2145–2151 10.1111/j.1365-2966.2012.20757.x free 1202.3279 2012MNRAS.422.2145H 119226494 See also 613100 2005 TN 74, which was also suspected of being a Neptune trojan at the time of discovery References External links MPEC 2007-X06, Minor Planet Electronic Circular (1 December 2007) 2007 RW 10 Precovery Images 309239 309239 (309239) 2007 RW 10 309239 309239 309239 20070909