(523676) 2013 UL10

Red comet-like centaur July 2021 yes (523676) 2013 UL 10 #C7FF8F Pan-STARRS 1 Haleakalā Obs. 18 August 2010 (523676) 2013 UL 10 centaur 1 July 2021 (JD 2459396.5) 10 7.56 yr (2,761 d) 13.658 AU 6.1724 AU 9.9153 AU 0.3775 31.22 yr (11,404 d) 81.728° 0.0316 ms / day 19.164° 233.98° 4 June 2014perihelion 186.17° 2.94 10 km ≤ (nucleus) 12 km (est. at 0.09) n.a. 0.12 (nucleus) B–V 0.97 0.02 V–R 0.67 0.02 B–R 1.64 0.03 12.8 (523676) 2013 UL 10 is a reddish centaur with cometary activity orbiting the Sun between Jupiter and Uranus. It was discovered on 18 August 2010, by a team of astronomers with the Pan-STARRS survey at the Haleakalā Observatory, Hawaii. It is the first centaur known to have both comet-like activity and red surface colors. It is also one of the smallest centaurs, with a nucleus of no more than 10 km mi off 2 us in diameter. 2021, it has not been named. Orbit and classification This object belongs to the centaurs, a dynamically unstable population of small Solar System bodies with chaotic orbits between the classical asteroids and the trans-Neptunian objects. Centaurs are considered to be objects with short lifetimes of approximately one million years, transitioning from the inactive population of Kuiper belt objects to the active group of Jupiter-family comets. 2013 UL 10 orbits the Sun at a distance of 6.2–13.7 AU once every 31 years and 3 months (11,404 days; semi-major axis of 9.92 AU). Its orbit has a high eccentricity of 0.38 and an inclination of 19° with respect to the ecliptic. It has a Tisserand's parameter with respect to Jupiter (TJ) of 2.94, near the threshold of 3, typically used to distinguish asteroids from Jupiter-family comets. On 4 June 2014, the object came to perihelion at 6.2 AU and has since been moving away from the Sun.perihelion 2021 the object is at 10.7 AU, The body's observation arc begins with its official discovery observation at Haleakalā Observatory in August 2010. Numbering and naming This minor planet was numbered by the Minor Planet Center on 25 September 2018, receiving the number 523676 523676 in the minor planet catalog (M.P.C. 111778). 2025, it has not been named. According to the established naming conventions, it will be named after one of the many centaurs from Greek mythology, which are creatures with the upper body of a human and the lower body and legs of a horse. Physical characteristics thumb|220px|left|2013 UL 10 has color index values similar to those of 33128 1998 BU 48. As with other populations, the centaurs show a bimodal distribution of colors: red and blue-grey. Cometary-like activity is well known among the grey centaurs, prominently represented by 2060 Chiron, which is also the namesake of the Chiron-type comets. However, outgassing activity of red centaurs (e.g. 5145 Pholus) has not been observed. 2013 UL 10 is the first of the group of red centaurs to display clear evidence of cometary activity. In October 2014, 2013 UL 10 was observed by astronomers using the Large Monolithic Imager of the 4.3-meter Discovery Channel Telescope in Arizona. An overall reddish color was determined with B–V, V–R and B–R color indices of 0.97 0.02, 0.67 0.02 and 1.64 0.03, respectively. It was the intrinsically faintest object observed for this study, with an absolute magnitude 13.46. In December 2015, observations with the Galileo National Telescope on the Canary Islands revealed that 2013 UL 10 exhibits comet-like activity. Apart from the object's dust coma, the astronomers also deduced a diameter of no more than 10 km mi off us for this centaur's nucleus, assuming an albedo of 0.12. Further photometric observations gave a dust production rate of 10 kg/s near the object's perihelion at 6.2 AU. The Collaborative Asteroid Lightcurve Link an estimates a diameter of kilometers 15.3 based on a albedo of 0.057 (carbonaceous) and on an absolute magnitude of 12.8. 2021, no rotational lightcurve of 2013 UL 10 has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown. See also List of centaurs (small Solar System bodies) 523676 Notes perihelion JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive.) References 30em 2018-03-10 last obs. JPL Small-Body Database Browser: 523676 (2013 UL10) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2523676 Jet Propulsion Laboratory 28 July 2021 523676 (2013 UL10) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=523676 28 July 2021 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 28 July 2021 Naming of Astronomical Objects – Minor planets IAU – International Astronomical Union https://www.iau.org/public/themes/naming/#minorplanets 27 July 2021 31 October 2013 https://web.archive.org/web/20131031154417/https://www.iau.org/public/themes/naming/#minorplanets dead Orbit Fit and Astrometric record for 523676 Southwest Research Institute https://www.boulder.swri.edu/~buie/kbo/astrom/523676.html 28 July 2021The Deep Ecliptic Survey Object Classifications List of Known Trans-Neptunian Objects Johnston's Archive 18 August 2020 Johnston Wm. Robert http://www.johnstonsarchive.net/astro/tnoslist.html 28 July 2021 523676 28 July 2021 Asteroid (523676) 2013 UL10 – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.3.0&n=523676 28 July 2021 6 Mazzotta Epifani E. Dotto E. Ieva S. Perna D. Palumbo P. Micheli M. Perozzi E. December 2018 523676 (2013 UL10): the first active red centaur https://www.aanda.org/articles/aa/pdf/2018/12/aa31224-17.pdf Astronomy and Astrophysics 620 A93 2018A&A...620A..93M 0004-6361 10.1051/0004-6361/201731224 126274614 Tegler S. C. Romanishin W. Consolmagno G. J. J. S. December 2016 Two Color Populations of Kuiper Belt and Centaur Objects and the Smaller Orbital Inclinations of Red Centaur Objects The Astronomical Journal 152 6 210 2016AJ....152..210T 0004-6256 10.3847/0004-6256/152/6/210 free External links Red centaurs, David J. Darling List Of Centaurs and Scattered-Disk Objects, Minor Planet Center Kuiper Belt Object Magnitudes and Surface Colors https://web.archive.org/web/20120908120608/http://www.physics.nau.edu/~tegler/research/survey.htm 8 September 2012 , Stephen C. Tegler, June 2018 Discovery Circumstances: Numbered Minor Planets (520001)-(525000) – Minor Planet Center 523676 (523675) 2013 PV74 523676 (523676) 2013 UL 10 (523677) 2013 UF15 523676 523676 20100818