2013 SY99

Trans-Neptunian object May 2017 yes #C2E0FF 2013 SY 99 Planet_nine-etnos_now.png The orbits of 2013 SY 99 (left; light blue) and other detached objects, along with the hypothetical Planet Nine's orbit (right; green) OSSOS CFHT 29 September 2013 2013 SY 99 TNOdetached uo3L91 (OSSOS survey designation) 27 April 2019 (JD 2458600.5) 4 4.30 yr 5 September 2013 45.00 AU e9km+e9mi 1 unit x (|) 50.029 ± 0.056 AU e9km+e9mi 2 unit x (|) ≈ 4 December 2054JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)±1 month Barycentric: 1410 AU e9km+e9mi 0 unit x (|) Heliocentric: 1330.8 ± 43.4 AU e9km+e9mi 1 unit x (|) Barycentric: 730 AU e9km+e9mi 0 unit x (|) Heliocentric: 690.4 ± 22.5 AU e9km+e9mi 1 unit x (|) 0.9274 0.0024 Barycentric: 19700 yr Heliocentric: 18142.4 886.5 yr 4.228 0.001 ° 29.493 0.005 ° 359.292 0.034 ° 0.203 0.010 arcsec/day 32.037 0.114 ° 6.7 24.5 (V)23.67 (peak 2055) ≈250 km mi on 0.05 0.03 moderately red 2013 SY 99 is a trans-Neptunian object discovered on 29 September 2013 by the Outer Solar System Origins Survey using the Canada–France–Hawaii Telescope at Mauna Kea Observatory. This object orbits the Sun between 50 and 1300 AU e9km 2 unit, and has a barycentric orbital period of nearly 20,000 years. It has the fourth largest semi-major axis for an orbit with perihelion beyond 38 AU. 2013 SY 99 has one of highest perihelia of any known extreme trans-Neptunian object, behind sednoids including Sedna (76 AU), 2012 VP 113 (80 AU), and Leleākūhonua (65 AU). Discovery According to astronomers Mike Brown and Konstantin Batygin, the discovery of 2013 SY 99 provides additional evidence for the existence of Planet Nine, but Michele Bannister, one of the astronomers who reported the discovery of this object, disputes this due to the orientation of the orbit.https://twitter.com/plutokiller/status/713111892672143360 the new one is uo3L91... Twitter.com Mike Brown 24 March 2016 Its existence was announced in 2016, but the observations were kept private until 2017. It was listed at the Minor Planet Center and the JPL Small-Body Database on 6 April 2017 with a three-year observation arc and an epoch 2017 heliocentric orbital period of 17,500 years. Barycentric orbital solutions, however, are more stable for objects on multi-thousand year orbits, and the barycentric period for 2013 SY 99 is 19,700 years.Heliocentric solutions are unstable due to the changing position of Jupiter over Jupiter's 12 year orbit which perturbs the eccentricity of the two-body solution of the Sun+asteroid. Barycentric solutions are more stable for objects that take thousands of years to orbit the Sun. Between epoch 2017 and epoch 2029, the heliocentric orbital period varies from a low of 17400 years "PR= 6.364e6 days (epoch 2017-Nov-16)" to a high of 26100 years "PR= 9.538e6 days (epoch 2023-Nov-16)". As of April 2019, its perihelion distance of q=50.029 0.056 AU and semi-major axis a=690 22 AU make 2013 SY 99 a possible sednoid, according to the most common definition of the term (q>50 AU, a>150 AU). It is listed as a sednoid by some. However, 2013 SY 99 is usually considered to be an extreme trans-Neptunian object and not a sednoid, due to its high eccentricity which makes the heliocentric orbit unstable. In the heliocentric reference frame, the perihelion is currently rising, and the nominal orbit has a perihelion distance above 50 AU only since October 2018. 2013 SY 99 is estimated to be about 250 km mi on in diameter and moderately red in color. In 2052 it will be roughly 20.3 AU e9km unit from Neptune. It will come to perihelion (closest approach to the Sun) around 2055 when it will be 50 AU e9km unit from the Sun. Physical characteristics Diameter and albedo According to the discovery paper, it has a mean diameter of ∼250 km mi on using 0.05 ± 0.03 albedo. Johnston's archive estimates a diameter of 162 km mi on using an assumed albedo of 0.124. Surface and spectra 2013 SY 99 has color indices of: g-r 0.64 ± 0.06, and r-i 0.46 ± 0.10. This color implies that it has a low albedo of 0.05 0.03. Johnston's archive assumes a albedo of 0.124. See also List of Solar System objects most distant from the Sun Notes n References 30em http://www.nature.com/news/astronomers-spot-distant-world-in-solar-system-s-far-reaches-1.20831 Astronomers spot distant world in Solar System's far reaches Nature Alexandra Witze 10.1038/nature.2016.20831 18 October 2016 http://www.sciencemag.org/news/2016/10/new-dwarf-planet-points-planet-nine New icy world with 20,000-year orbit could point to Planet Nine 10.1126/science.aal0270 Science Adam Mann 17 October 2016 http://minorplanetcenter.net/db_search/show_by_properties?perihelion_distance_min=38&semimajor_axis_min=250 Objects with q > 38 & a > 250 Minor Planet Center International Astronomical Union 24 October 2016 A new high-perihelion a ~ 700 AU object in the distant Solar System 48th Meeting of the Division for Planetary Sciences. 16–21 October 2016. Pasadena, California. Michele T. Bannister Ying-Tung Chen Marian Jakubik etal 113.08 October 2016 2016DPS....4811308B last observation: 4 November 2016; arc: 3.16 years JPL Small-Body Database Browser: (2013 SY99) http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2013SY99 Jet Propulsion Laboratory 15 October 2018 Horizons output http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2013SY99 Barycentric Osculating Orbital Elements for 2013 SY99 6 April 2017 (Ephemeris Type:Elements and Center:@0) Bannister Michele Shankman Cory Volk Katherine OSSOS: V. Diffusion in the orbit of a high-perihelion distant Solar System object The Astronomical Journal 153 6 262 2017 1704.01952 2017AJ....153..262B 10.3847/1538-3881/aa6db5 3502267 free MPEC 2017-G55 : 2013 SY99 IAU Minor Planet Center 6 April 2017 http://www.minorplanetcenter.net/mpec/K17/K17G55.html 15 October 2018 (K13S99Y) A New High Perihelion Inner Oort Cloud Object Scott Sheppard Chadwick Trujillo David Tholen Nathan Kaib The Astronomical Journal 1810.00013 2 October 2018 157 4 139 10.3847/1538-3881/ab0895 119071596 free 2019AJ....157..139S JPL Horizons On-Line Ephemeris System Ephemeris Type: ELEMENTS, Target Body: Asteroid (2013 SY99), Center: Sun (body center) [500@10], Time Span: Start=2018-10-01, Stop=2018-10-15, Step=1 d, Table Settings: defaults, Display/Output: default (formatted HTML) http://ssd.jpl.nasa.gov/horizons.cgi 4 October 2018 JPL Horizons On-Line Ephemeris System http://www.johnstonsarchive.net/astro/tnoslist.html 7 October 2018 15 October 2018 List of Known Trans-Neptunian Objects Johnston, W. R. Johnston's Archive etal Shankman Cory OSSOS. VI. Striking Biases in the Detection of Large Semimajor Axis Trans-Neptunian Objects https://pure.qub.ac.uk/portal/en/publications/ossos-vi-striking-biases-in-the-detection-of-large-semimajor-axis-transneptunian-objects(027b7a9c-a171-42b4-9449-9355b0a255d4).html 2017 The Astronomical Journal 154 2 50 10.3847/1538-3881/aa7aed 1706.05348 2017AJ....154...50S 10150/625487 3535702 free External links OSSOS survey by the Canada–France–Hawaii Telescope _w9N6yABAW4 Exploring the outer Solar System: now in vivid colour (18 March 2016); discovery of uo3L91 discussed at 28:13 3773829 # # Category:Minor planet object articles (unnumbered) 20130929 Category:Discoveries by OSSOS Category:Inner Oort cloud