12052 Aretaon

Trojan asteroid June 2018 yes 12052 Aretaon #C2FFFF E. W. Elst La Silla Obs. 3 May 1997 (12052) Aretaon 1997 JB 161977 UG 51999 NE 62 ær ᵻ ˈ t eɪ ɒ n Ἀρετάων Aretāōn(Greek mythology) Jupiter trojanTrojanbackground 23 March 2018 (JD 2458200.5) 0 40.60 yr (14,828 d) 5.5958 AU 4.8837 AU 5.2397 AU 0.0680 11.99 yr (4,381 d) 197.23° 0.0822 ms / day 11.463° 219.79° 85.727° 0.256 AU 2.9550 39.151 0.809 km42.23 km (calculated) 8.05 h 0.057 (assumed)0.073 0.013 C (assumed) 10.425 0.002 (R)10.5010.6 12052 Aretaon ær ᵻ ˈ t eɪ ɒ n is a mid-sized Jupiter trojan from the Trojan camp, approximately 40 km mi off 2 us in diameter. It was discovered on 3 May 1997, by Belgian astronomer Eric Elst at ESO's La Silla Observatory in northern Chile. The dark Jovian asteroid has a rotation period of 8.05 hours. It was named after Aretaon from Greek mythology. Orbit and classification Aretaon is a Jupiter trojan in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's Lagrangian point, 60° behind its orbit (see Trojans in astronomy). It orbits the Sun at a distance of 4.9–5.6 AU once every 11 years and 12 months (4,381 days; semi-major axis of 5.24 AU). Its orbit has an eccentricity of 0.07 and an inclination of 11° with respect to the ecliptic. The body's observation arc begins with its first observation as 1977 UG 5 at the Palomar Observatory in October 1977, almost 20 years prior to its official discovery observation at La Silla. Naming This minor planet was named from Greek mythology after the Trojan warrior Aretaon. He was killed by Teucer during the Trojan War. The official naming citation was published by the Minor Planet Center on 6 January 2003 (M.P.C. 47300). Physical characteristics Aretaon is an assumed, carbonaceous C-type asteroid. The majority of Jupiter trojans are D-types, with the remainder being mostly C- and P-type asteroids. Rotation period In September 2012, a rotational lightcurve of Aretaon was obtained from photometric observations by Robert Stephens at the Center for Solar System Studies in Landers, California. Lightcurve analysis gave a rotation period of 8.05 hours with a brightness amplitude of 0.17 magnitude (U=2). This period determination was confirmed by astronomers at the Palomar Transient Factory in September 2013, measuring a period of 8.048 hours and an amplitude of 0.19 magnitude in the R-band (U=2). Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Aretaon measures 39.151 kilometers in diameter and its surface has an albedo of 0.073, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 42.23 kilometers based on an absolute magnitude of 10.6. References 30em 2018-05-24 last obs. JPL Small-Body Database Browser: 12052 Aretaon (1997 JB16) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2012052 Jet Propulsion Laboratory 30 June 2018 12052 Aretaon (1997 JB16) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=12052 30 June 2018 List of Jupiter Trojans Minor Planet Center V. Carruba 1 June 2018 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 30 June 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 30 June 2018 T. Grav A. K. Mainzer J. M. Bauer J. R. Masiero C. R. Nugent November 2012 WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy The Astrophysical Journal 759 1 10 2012ApJ...759...49G 10.1088/0004-637X/759/1/49 1209.1549 119101711 (online catalog) Asteroid (12052) Aretaon – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=12052&pc=1.1.6 30 June 2018 12052 30 June 2018 Linda M. French Robert D. Stephens Daniel R. Coley Lawrence H. Wasserman Faith Vilas Daniel La Rocca October 2013 A Troop of Trojans: Photometry of 24 Jovian Trojan Asteroids The Minor Planet Bulletin 40 4 198–203 1052-8091 2013MPBu...40..198F 6 Adam Waszczak Chan-Kao Chang Eran O. Ofek Russ Laher Frank Masci David Levitan Jason Surace Yu-Chi Cheng Wing-Huen Ip Daisuke Kinoshita George Helou Thomas A. Prince Shrinivas Kulkarni September 2015 Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry The Astronomical Journal 150 3 35 2015AJ....150...75W 10.1088/0004-6256/150/3/75 1504.04041 8342929 External links 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 (10001)-(15000) – Minor Planet Center Asteroid 12052 Aretaon https://web.archive.org/web/20180630190145/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=12052+Aretaon 30 June 2018 at the Small Bodies Data Ferret 12052 12051 Pícha 12052 12053 Turtlestar 012052 Category:Discoveries by Eric Walter Elst Category:Named minor planets 19970503