11552 Boucolion

Trojan asteroid June 2018 yes 11552 Boucolion #C2FFFF E. W. Elst CERGA Obs. 27 January 1993 (11552) Boucolion 1993 BD 41975 NP 11994 CE 20 Boucolian b aʊ ˈ k oʊ l i ɒ n'Bucolion' in Noah Webster (1884) A Practical Dictionary of the English Language Boucolion(Greek mythology) Jupiter trojanTrojanbackground 23 March 2018 (JD 2458200.5) 0 25.31 yr (9,243 d) 6.0675 AU 4.4713 AU 5.2694 AU 0.1515 12.10 yr (4,418 d) 220.22° 0.0815 ms / day 14.679° 138.36° 182.38° 0.5638 AU 2.9120 51.14 0.52 km53.91 4.32 km 32.44 0.05 hlightcurve-plots-CS3 0.035 0.0060.062 0.007 D (Pan-STARRS)D (SDSS-MOC) 10.110.18 0.2410.60 11552 Boucolion b aʊ ˈ k oʊ l i ɒ n is a Jupiter trojan from the Trojan camp, approximately 53 km mi off 2 us in diameter. It was discovered on 27 January 1993, by Belgian astronomer Eric Elst at the CERGA Observatory in Caussols, France. The dark D-type asteroid is one of the 90 largest Jupiter trojans and has a long rotation period of 32.4 hours. It was named from Greek mythology after the Boucolion, who lost his sons in the Trojan War. Orbit and classification Boucolion is a dark Jupiter trojan in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the planet's Lagrangian point, 60° behind its orbit (see Trojans in astronomy). It is also a non-family asteroid of the Jovian background population. It orbits the Sun at a distance of 4.5–6.1 AU once every 12 years and 1 month (4,418 days; semi-major axis of 5.27 AU). Its orbit has an eccentricity of 0.15 and an inclination of 15° with respect to the ecliptic. The asteroid was first observed as 1975 NP 1 at Crimea–Nauchnij in July 1973. The body's observation arc begins with its official discovery observation at Caussols in January 1993. Physical characteristics In the SDSS-based taxonomy, Boucolion is a D-type asteroid, the most common type among the larger Jupiter trojans. It has also been characterized as a D-type by Pan-STARRS' survey, while the Collaborative Asteroid Lightcurve Link assumes it to be a carbonaceous C-type asteroid. Rotation period In September 2012, a rotational lightcurve of Boucolion was first obtained from photometric observations by astronomers at the Palomar Transient Factory (PTF) in California. Lightcurve analysis gave a rotation period of 16.150 and 16.177 hours with a brightness amplitude of 0.23 and 0.25 magnitude in the R- and S-band, respectively (U=2/2). A more refined, alternative period solution of 32.44 0.05 hours with an amplitude of 0.21 magnitude was measured by Robert Stephens at the Center for Solar System Studies in January 2015 (U=2).lightcurve-plots-CS3 The result seems to be a 1:2 alias, i.e. twice the period, of the previously obtained lightcurve at the PTF. While not being a slow rotator, Boucolion has one of the longest periods among the larger Jupiter trojans (see table below). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Boucolion measures 51.136 and 53.91 kilometers in diameter and its surface has an albedo of 0.062 and 0.035, respectively. CALL assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 53.16 kilometers based on an absolute magnitude of 10.1. Naming This minor planet was named from Greek mythology after Boucolion, father of the two Trojan warriors Pedasos and Aesopos, who both were slain near the River Scamander during the Trojan War. The official naming citation was published by the Minor Planet Center on 6 January 2003 (M.P.C. 47299). Notes lightcurve-plots-CS3 Lightcurve plot of (11552) Boucolion from Jan 2015 by Robert Stephens at the Center for Solar System Studies U81. Quality code is 3- (lightcurve rating at CS3). Summary figures at the LCDB and CS3. References 30em 2018-05-19 last obs. JPL Small-Body Database Browser: 11552 Boucolion (1993 BD4) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2011552 Jet Propulsion Laboratory 20 June 2018 11552 Boucolion (1993 BD4) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=11552 20 June 2018 List of Jupiter Trojans Minor Planet Center V. Carruba 1 June 2018 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 20 June 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 20 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 (11552) Boucolion – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=11552&pc=1.1.6 20 June 2018 Asteroid 11552 Boucolion Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=11552+Boucolion 20 June 2018 20 June 2018 https://web.archive.org/web/20180620074146/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=11552%20Boucolion dead J. M. Carvano P. H. Hasselmann D. Lazzaro T. Mothé-Diniz February 2010 SDSS-based taxonomic classification and orbital distribution of main belt asteroids https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_I0035_5_SDSSTAX_V1_1/data/sdsstax_ast_table.tab Astronomy and Astrophysics 510 12 2010A&A...510A..43C 10.1051/0004-6361/200913322 30 October 2019 free (PDS data set) 11552 20 June 2018 6 Fumihiko Usui Daisuke Kuroda Thomas G. Müller Sunao Hasegawa Masateru Ishiguro Takafumi Ootsubo Daisuke Ishihara Hirokazu Kataza Satoshi Takita Shinki Oyabu Munetaka Ueno Hideo Matsuhara Takashi Onaka October 2011 Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey Publications of the Astronomical Society of Japan 63 5 1117–1138 2011PASJ...63.1117U 10.1093/pasj/63.5.1117 (online, AcuA catalog p. 153) 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 Robert D. Stephens Daniel R. Coley Linda M. French July 2015 Dispatches from the Trojan Camp - Jovian Trojan L5 Asteroids Observed from CS3: 2014 October - 2015 January The Minor Planet Bulletin 42 3 216–224 1052-8091 2015MPBu...42R.216S 6 Peter Veres Robert Jedicke Alan Fitzsimmons Larry Denneau Mikael Granvik Bryce Bolin Serge Chastel Richard J. Wainscoat William S. Burgett Kenneth C. Chambers Heather Flewelling Nick Kaiser Eugen A. Magnier Jeff S. Morgan Paul A. Price John L. Tonry Christopher Waters November 2015 Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results Icarus 261 34–47 2015Icar..261...34V 10.1016/j.icarus.2015.08.007 1506.00762 53493339 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 11552 2011552 11552 11553 Scheria 011552 Category:Discoveries by Eric Walter Elst Category:Named minor planets 19930127