1172 Äneas

Jupiter trojan asteroid March 2018 yes 1172 Äneas #C2FFFF 1172 Aneas 28.07.2014.gif 1172 Äneas orbit and position on 28 Jul 2014 K. Reinmuth Heidelberg Obs. 17 October 1930 (1172) Äneas 1930 UA @ ˈ n iː ə sAeneas Äneian Aeneas (Αἰνείας Aineias)(Greek mythology) Jupiter trojanTrojanbackground 23 March 2018 (JD 2458200.5) 0 87.27 yr (31,874 d) 5.7602 AU 4.6762 AU 5.2182 AU 0.1039 11.92 yr (4,354 d) 238.45° 0.0827 ms / day 16.664° 247.33° 50.803° 0.4772 AU 2.9060 118.02 0.81 km142.82 4.8 km148.66 1.98 km 8.681 0.003 hlightcurve-plots-CS38.700 0.002 hlightcurve-plots-CS38.701 0.001 hlightcurve-plots-CS38.705 0.005 h8.708 0.009 h 0.037 0.0010.0403 0.0030.059 0.006 D (Tholen)D0 (Barucci)DP (Tedesco)U–B 0.254 0.033B–V 0.840 0.050V–R 0.460 0.050V–I 0.990 0.017 8.08 0.138.33 14.7Perihelic opposition to 16.6 1172 Äneas @ ˈ n iː ə s is a large Jupiter trojan from the Trojan camp, approximately 140 km mi off 1 us in diameter. It was discovered on 17 October 1930, by astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The dark D-type asteroid is one of the largest Jupiter trojans and has a rotation period of 8.7 hours. It is named after the Trojan prince Aeneas, from Greek mythology. Orbit and classification Äneas is located in the Lagrangian point, 60° behind Jupiter in the so-called Trojan camp, orbiting in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid of the Jovian background population. It orbits the Sun at a distance of 4.7–5.8 AU once every 11 years and 11 months (4,354 days; semi-major axis of 5.22 AU). Its orbit has an eccentricity of 0.10 and an inclination of 17° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Heidelberg in October 1930. Naming This minor planet was named after the Trojan hero Aeneas from Greek mythology. He is the son of goddess Aphrodite and Anchises after whom 1173 Anchises was named. The 1172 official naming was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 109). Physical characteristics Rotation period Several rotational lightcurves of Äneas have been obtained since the first photometric observations by William Hartmann in 1988, that gave a period of 8.33 hours, and by Stefano Mottola and Anders Erikson in 1993, using the ESO 1-metre telescope at La Silla Observatory in Chile. Lightcurve analysis gave a rotation period of 8.708 0.009 hours with a brightness variation of 0.27 0.01 magnitude (U=3). In July and August 2008, Susan Lederer at CTIO in Chile, and Robert Stephens at the Goat Mountain Astronomical Research Station G79 in California, determined a well-defined period of 8.705 0.005 h with an amplitude 0.20 magnitude (U=3). Follow-up observations during 2015–2017 by Robert Stephens and Daniel Coley at the Center for Solar System Studies gave three concurring periods of 8.701, 8.681 and 8.7 hours with an amplitude of 0.62, 0.40 and 0.21 magnitude, respectively (U=3/3/3),lightcurve-plots-CS3 while in August 2011, Pierre Antonini reported a period of 11.8 hours based on a fragmentary lightcurve (U=2-). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Äneas measures between 118.02 and 148.66 kilometers in diameter – making it anywhere from the 8th to 4th largest Jupiter trojan – determined from a common absolute magnitude of 8.33 and a surface albedo between 0.037 and 0.059. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0403 and a diameter of 142.82 kilometers based on an absolute magnitude of 8.33. Spectral type In the Tholen and Barucci classification, Äneas is a dark D-type asteroid, while in the Tedesco classification is as D/P-type asteroid. Its high V–I color index of 0.99 is typical for D-types. Notes lightcurve-plots-CS3 Lightcurve plots of (1172) Äneas from Jan 2015, Jan 2016 and Dec 2016 (n.a.) by Daniel Coley and Robert Stephens at the Center for Solar System Studies U80 and U81. Quality code is 3/3/3 (lightcurve rating at CS3). Summary figures at the LCDB and CS3. References 30em 2018-05-22 last obs. JPL Small-Body Database Browser: 1172 Aneas (1930 UA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001172 Jet Propulsion Laboratory 13 June 2018 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 99 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1173 (1172) Äneas 1172 Äneas (1930 UA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1172 13 June 2018 List of Jupiter Trojans Minor Planet Center 2 February 2018 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 3 March 2018 Asteroids and comets rotation curves – (1172) Äneas Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001172 3 March 2018 3 December 2002 https://web.archive.org/web/20021203214643/http://obswww.unige.ch/~behrend/page3cou.html#001172 dead 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 (1172) Äneas – Proper elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=1172&pc=1.1.6 13 June 2018 Asteroid 1172 Äneas Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1172+Aneas 13 June 2018 13 June 2018 https://web.archive.org/web/20180613210642/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1172+Aneas dead 1172 3 March 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) 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 IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 15 June 2018 Linda M. French Robert D. Stephens Susan M. Lederer Daniel R. Coley Derrick A. Rohl April 2011 Preliminary Results from a Study of Trojan Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38..116F The Minor Planet Bulletin 38 2 116–120 1052-8091 2011MPBu...38..116F 3 March 2018 6 Stefano Mottola Mario Di Martino Anders Erikson Maria Gonano-Beurer Albino Carbognani Uri Carsenty Gerhard Hahn Hans-Josef Schober Felix Lahulla Marco Delbò Claes-Ingvar Lagerkvist May 2011 Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects The Astronomical Journal 141 5 32 2011AJ....141..170M 10.1088/0004-6256/141/5/170 free Stephens, Robert D. April 2017 Lightcurve Analysis of Trojan Asteroids at the Center for Solar System Studies 2016 October - December The Minor Planet Bulletin 44 2 123–125 32455395 7243949 1052-8091 2017MPBu...44..123S Robert D. Stephens Daniel R. Coley Linda M. French July 2016 A Report from the L5 Trojan Camp - Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..265S The Minor Planet Bulletin 43 3 265–270 1052-8091 2016MPBu...43..265S 3 March 2018 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 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015MPBu...42R.216S The Minor Planet Bulletin 42 3 216–224 1052-8091 2015MPBu...42R.216S 3 March 2018 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 Joseph P. Chatelain Todd J. Henry Linda M. French Jennifer G. Winters David E. Trilling June 2016 Photometric colors of the brightest members of the Jupiter L5 Trojan cloud Icarus 271 158–169 2016Icar..271..158C 10.1016/j.icarus.2016.01.026 free External links Largest Jupiter trojans SBDB, query 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 Asteroids and comets rotation curves, CdR https://web.archive.org/web/20160729213840/http://obswww.unige.ch/~behrend/page_cou.html 29 July 2016 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1172 1171 Rusthawelia 1172 1173 Anchises 001172 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001172 19301017