2011 JY31

Binary Kuiper belt object November 2021 yes 2011 JY 31 #C2E0FF 2011 JY31 crop - Weaver et al. 2022 Fig 5.jpg 2011 JY 31 imaged by the New Horizons spacecraft on 9 September 2018 New Horizons KBO Search Las Campanas Obs. 4 May 2011 2011 JY 31 VNH0008 TNOcubewanodistantbinary 1 July 2021 (JD 2459396.5) 4 7.4 yr 28 April 2011 47.183 AU 41.518 AU 44.350 AU 0.06387 295.36 yr (107,881 d) 318.400° 0.003337 ms / day 2.602° 231.356° 105.231° 54 - 68 km (component) 46.62 0.06 h 61.40 1.35 ° (wrt orbit)61.34 1.34 ° (wrt ICRF pole) ~1.7 17 kg 0.5 - 1.0 g/cm3 0.147 (geometric)0.036 (Bond) V–I=1.25 0.19 24.7 8.1 0.28.8 2011 JY 31 is a binary trans-Neptunian object from the Kuiper belt, located in the outermost region of the Solar System. It is a cold classical Kuiper belt object. 2011 JY 31 was discovered on 4 May 2011, by a team of astronomers using one of the Magellan Telescopes in Chile during the New Horizons KBO Search for a potential flyby target for the New Horizons spacecraft. Distant observations by New Horizons from September 2018 revealed its binary nature, showing two 68 km mi-wide components in a tight, mutual orbit 200 km mi apart. Numbering and naming This minor planet has not been numbered by the Minor Planet Center and remains unnamed. Physical parameters thumb|left|Collage of New Horizons images of 2011 JY 31 from September 2018. A model point spread function (red) is overlaid and subtracted from the image, which reveals the two components of the 2011 JY 31 system. thumb|left|Comparison of orbital separations and diameters of trans-Neptunian close binaries High resolution observation by the New Horizons spacecraft made it possible to estimate the parameters of the binary orbit and the system mass. Assuming that the orbit is circular the period is 46.62 0.06 hours, semimajor axis is 198.6 2.9 km and the system mass is about 1.7 17 kg. The components are approximately equal in size and are approximately 68 km in size assuming density of 0.5 kg/cm3. The discovery adds support to streaming instability as the dominant mechanism in the formation of tight and contact binary planetesimals such as 486958 Arrokoth, which appear to be prevalent in the cold classical Kuiper belt population. See also 2014 OS 393, another tight binary KBO observed by New Horizons List of New Horizons topics References 30em 2016-06-30 last obs. JPL Small-Body Database Browser: (2011 JY31) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=3620472 Jet Propulsion Laboratory 11 November 2021 2011 JY31 https://www.minorplanetcenter.net/db_search/show_object?object_id=2011+JY31 Minor Planet Center International Astronomical Union 11 November 2021 List of Known Trans-Neptunian Objects http://www.johnstonsarchive.net/astro/tnoslist.html Wm. Robert Johnston Johnston's Archive 29 August 2021 11 November 2021 MPEC 2012-X60 : 2011 JY31 https://minorplanetcenter.net//mpec/K12/K12X60.html Minor Planet Electronic Circular Minor Planet Center 11 December 2012 13 November 2021 2012MPEC....X...60T Tholen D. J. Buie M. W. Trilling D. Spencer J. Borncamp D. M. Osip D. J. Kavelaars J. Fuentes C. I. Schechter P. L. McLeod B. A. Conroy M. Parker A. H. Sheppard S. S. Williams G. V. 2012-X60 Orbital Refinement and Characterization of New Horizons KBO candidates – HST Proposal 12535 https://archive.stsci.edu/proposal_search.php?id=12535&mission=hst Susan Benecchi Mikulski Archive for Space Telescopes Space Telescopes Science Institute October 2011 12535 13 November 2021 2011hst..prop12535B S. D. Benecchi K. S. Noll H. A. Weaver J. R. Spencer S. A. Stern M. W. Buie A. H. Parker New Horizons: Long-range Kuiper Belt targets observed by the Hubble Space Telescope Icarus January 2015 246 369–374 10.1016/j.icarus.2014.04.014 1405.7181 2015Icar..246..369B 2060/20150011460 119239605 etal Anne J. Verbiscer Simon Porter Susan D. Benecchi J. J. Kavelaars Harold A. Weaver John R. Spencer Phase Curves from the Kuiper Belt: Photometric Properties of Distant Kuiper Belt Objects Observed by New Horizons The Astronomical Journal September 2019 158 3 123 17 10.3847/1538-3881/ab3211 1405.7181 2019AJ....158..123V 202150415 free Harold Weaver Simon Porter John Spencer Discovery of Tight Binaries in the Kuiper Belt by New Horizons LORRI https://baas.aas.org/pub/2021n7i307p07/release/1 53rd Annual DPS Meeting American Astronomical Society October 2021 53 7 307.07 2021DPS....5330707W New Horizons Discovers Kuiper Belt "Twins" https://skyandtelescope.org/astronomy-news/new-horizons-discovers-kuiper-belt-twins/ David Dickinson Sky & Telescope 8 October 2021 13 November 2021 etal Simon B. Porter John R. Spencer Anne J. Verbiscer Susan Benecchi Hal A. Weaver Hsing Wen Lin Orbits and Occultation Opportunities of 15 TNOs Observed by New Horizons The Planetary Science Journal January 2022 3 1 19 10.3847/PSJ/ac3491 2022PSJ.....3...23P free H. A. Weaver S. B. Porter J. R. Spencer High-resolution Search for Kuiper Belt Object Binaries from New Horizons The Planetary Science Journal February 2022 3 2 46 10.3847/PSJ/ac4cb7 free 2201.05940 2022PSJ.....3...46W 247088149 External links DPS 53 Wednesday Press Conference (Tight Twins in the Kuiper Belt presentation by Hal Weaver), AAS Press Office, YouTube, 6 October 2021 DPS 53: Days 3, 4, and 5, Kerry Hensley, AAS Nova, 9 October 2021 List of Transneptunian Objects, Minor Planet Center 2011JY31 3620472 expanded # Category:Minor planet object articles (unnumbered) # # 20110504