12444 Prothoon

Trojan asteroid June 2018 yes 12444 Prothoon #C2FFFF E. W. Elst La Silla Obs. 15 April 1996 (12444) Prothoon 1996 GE 19 Prothoonian ' p r ɒ θ oʊ . ɒ n Προθόων Prothoōn(Greek mythology) Jupiter trojanTrojanbackground 23 March 2018 (JD 2458200.5) 0 22.17 yr (8,096 d) 5.6206 AU 4.8680 AU 5.2443 AU 0.0718 12.01 yr (4,387 d) 240.44° 0.0821 ms / day 30.827° 213.23° 64.656° 0.3876 AU 2.7120 62.41 2.92 km63.84 0.84 km64.31 15.8 km64.41 km (derived) 15.82 0.01 h 0.039 0.0300.043 0.0040.0467 (derived)0.052 0.008 C (assumed) 9.89.99.95 0.3110.10 12444 Prothoon ' p r ɒ θ oʊ . ɒ n is a large Jupiter trojan from the Trojan camp, approximately 64 km mi off 2 us in diameter. It was discovered on 15 April 1996, by Belgian astronomer Eric Elst at the La Silla Observatory in northern Chile. The assumed C-type asteroid is one of the 60 largest Jupiter trojans and has a rotation period of 15.82 hours. It was named after Prothoon from Greek mythology. Orbit and classification Prothoon is a dark Jovian asteroid orbiting in the trailering Trojan camp at Jupiter's Lagrangian point, 60° behind on the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy). This asteroid is not a member of any asteroid family but belongs to the Jovian background population. It orbits the Sun at a distance of 4.9–5.6 AU once every 12.01 years (4,387 days; semi-major axis of 5.24 AU). Its orbit has an eccentricity of 0.07 and an inclination of 31° with respect to the ecliptic. The body's observation arc begins with a precovery taken at La Silla in March 1996, one month prior to its official discovery observation. Physical characteristics Prothoon is an assumed C-type asteroid. Rotation period In August 2011, a rotational lightcurve of Prothoon was obtained from photometric observations by Robert Stephens at the Goat Mountain Astronomical Research Station G79 in California. Lightcurve analysis gave a rotation period of 15.82 hours with a brightness amplitude of 0.20 magnitude (U=3-). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite, the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, and the Infrared Astronomical Satellite IRAS, Prothoon measures between 62.41 and 64.31 kilometers in diameter and its surface has an albedo between 0.039 and 0.052. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0467 and a diameter of 64.41 kilometers based on an absolute magnitude of 9.9. Naming This minor planet was named from Greek mythology after the Trojan warrior Prothoon, who 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). References 30em 2018-05-24 last obs. JPL Small-Body Database Browser: 12444 Prothoon (1996 GE19) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2012444 Jet Propulsion Laboratory 8 June 2018 12444 Prothoon (1996 GE19) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=12444 8 June 2018 List of Jupiter Trojans Minor Planet Center 30 May 2018 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 6 June 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 8 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 (12444) Prothoon – Proper elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=12444&pc=1.1.6 8 June 2018 Asteroid 12444 Prothoon Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=12444+Prothoon 8 June 2018 12 June 2018 https://web.archive.org/web/20180612144037/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=12444+Prothoon dead E. F. Tedesco P. V. Noah M. Noah S. D. Price October 2004 IRAS Minor Planet Survey V6.0 https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0 12 IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 15 June 2018 12444 8 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 free (online, AcuA catalog p. 153) Linda M. French Robert D. Stephens Daniel R. Coley Ralph Megna Lawrence H. Wasserman July 2012 Photometry of 17 Jovian Trojan Asteroids The Minor Planet Bulletin 39 3 183–187 1052-8091 2012MPBu...39..183F 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 12444 12443 Paulsydney 12444 12445 Sirataka 012444 Category:Discoveries by Eric Walter Elst Category:Named minor planets 19960415