1583 Antilochus

Jupiter trojan asteroid June 2018 yes 1583 Antilochus #C2FFFF S. Arend Uccle Obs. 19 September 1950 (1583) Antilochus 1950 SA1926 VF1974 WH 1 Antilochian æ n ˈ t ɪ l ə k ə sNoah Webster (1884) A Practical Dictionary of the English Language Antilochus(Greek mythology) Jupiter trojanGreekbackground 23 March 2018 (JD 2458200.5) 0 91.53 yr (33,430 d) 5.3959 AU 4.8644 AU 5.1301 AU 0.0518 11.62 yr (4,244 d) 256.95° 0.0848 ms / day 28.512° 221.38° 187.27° 0.0264 AU 2.7570 101.62 3.2 km108.84 0.54 km111.69 3.86 km 15.889 0.005 hlightcurve-plots-Stephens 0.053 0.0040.054 0.0040.0633 0.004 D (Tholen)D0 (Barucci)D (Tedesco)U–B 0.253 038B–V 0.752 020V–I 0.950 0.043BR 1.220 0.109 8.588.59 0.068.60 1583 Antilochus æ n ˈ t ɪ l ə k ə s is a large Jupiter trojan from the Greek camp, approximately 108 km mi off us in diameter. It was discovered on 19 September 1950, by Belgian astronomer Sylvain Arend at Uccle Observatory in Belgium, and later named after the hero Antilochus from Greek mythology. The dark D-type asteroid belongs to the 20 largest Jupiter trojans and has a rotation period of 15.9 hours. It forms an asteroid pair with 3801 Thrasymedes. Classification and orbit Antilochus is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's Lagrangian point, 60° ahead of its orbit in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid in the Jovian background population. It orbits the Sun at a distance of 4.9–5.4 AU once every 11 years and 7 months (4,244 days; semi-major axis of 5.13 AU). Its orbit has an eccentricity of 0.05 and an inclination of 29° with respect to the ecliptic. The asteroid was first observed as 1926 VF at Heidelberg Observatory in November 1926. The body's observation arc begins with its official discovery observation at Uccle in September 1950. Asteroid pair In 1993, Andrea Milani suggested that Antilochus forms an asteroid pair with 3801 Thrasymedes, using the hierarchical clustering method (HCM), which looks for groupings of neighboring asteroids based on the smallest distances between them in the proper orbital element space. The astronomer describes the finding as statistically significant though difficult to account for by a regular collisional event. The Antilochus–Thrasymedes pair is not listed at the Johnston's archive. Naming This minor planet was named after prince Antilochus from Greek mythology. He was the youngest son of King Nestor (659 659 Nestor), close friend of Greek hero Achilles (588 588 Achilles) and commander of the Greek contingent of the Pylians during the Trojan War. The official 1583 naming citation was published by the Minor Planet Center in May 1952 (M.P.C. 770). Physical characteristics In the Tholen, Barucci and Tesco classification, Antilochus is a dark D-type asteroid, with a V–I color index of 0.95. The D-type is the most common spectral type among the Jupiter trojans. Rotation period In December 2009 and June 2016, rotational lightcurves of Antilochus were obtained from photometric observations by American astronomer Robert Stephens at the Santana Observatory 646 and at the Center for Solar System Studies (CS3) in California. Lightcurve analysis gave a rotation period of 31.52 and 31.54 hours with an amplitude of 0.09 and 0.11 magnitude, respectively (U=2/2). Follow-up observations over a total of 11 nights by Stephens in August 2017 gave the so-far best-rated lightcurve with a period of 15.889 0.005 hours – which corresponds to half the period solution of the former results – and a slightly higher brightness variation of 0.12 magnitude (U=2+).lightcurve-plots-Stephens Stephen's period determination supersedes previously reported results by Vincenzo Zappalà (1985; 12 h), Federico Manzini (2007; 12 h) and René Roy (2009; 22.5 h) (U=3−/3). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Antilochus measures between 101.62 and 111.69 kilometers in diameter and its surface has an albedo between 0.053 and 0.063. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0633 and a diameter of 101.62 kilometers, with Pravec's revised absolute magnitude of 8.59. Notes 30em lightcurve-plots-Stephens Lightcurve plots of (1583) Antilochus from Jun 2016 and Aug 2017 by Robert Stephens at the Center for Solar System Studies U81. Quality code is 3/2+ (lightcurve rating at CS3). Summary figures at the LCDB and CS3. References 2018-05-21 last obs. JPL Small-Body Database Browser: 1583 Antilochus (1950 SA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001583 Jet Propulsion Laboratory 13 June 2018 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 125 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1584 (1583) Antilochus 1583 Antilochus (1950 SA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1583 13 June 2018 List of Jupiter Trojans Minor Planet Center 30 May 2018 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 13 June 2018 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 2009 https://archive.org/details/dictionaryminorp2008schm limited Appendix – Publication Dates of the MPCs Schmadel Lutz D. Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 2009dmpn.book.....S 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 (1583) Antilochus – Proper elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=1583&pc=1.1.6 13 June 2018 Asteroid 1583 Antilochus Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1583+Antilochus 13 June 2018 13 June 2018 https://web.archive.org/web/20180613162612/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1583+Antilochus dead Asteroids and comets rotation curves – (1583) Antilochus Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001583 13 June 2018 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001583 dead Milani, Andrea October 1993 The Trojan asteroid belt: Proper elements, stability, chaos and families http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1993CeMDA..57...59M&data_type=PDF_HIGH Celestial Mechanics and Dynamical Astronomy 57 1–2 59–94 0923-2958 1993CeMDA..57...59M 10.1007/BF00692462 189850747 30 June 2018 Asteroid pairs and clusters Johnston's Archive 29 April 2018 Johnston, Wm. Robert http://www.johnstonsarchive.net/astro/asteroidpairs.html 30 June 2018 1583 13 June 2018 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 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) V. Zappala M. di Martino A. Cellino G. de Sanctis P. Farinella December 1989 Rotational properties of outer belt asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1989Icar...82..354Z Icarus 82 2 354–368.ResearchsupportedbyCNRandMPI 0019-1035 1989Icar...82..354Z 10.1016/0019-1035(89)90043-2 25 April 2017 Stephens, Robert D. April 2010 Trojan Asteroids Observed from GMARS and Santana Observatories: 2009 October – December http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37...47S The Minor Planet Bulletin 37 2 47–48 1052-8091 2010MPBu...37...47S 25 April 2017 Robert D. Stephens Daniel R. Coley Brian D. Warner Linda, M. French October 2016 Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies: L4 Greek Camp and Spies http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..323S The Minor Planet Bulletin 43 4 323–331 1052-8091 2016MPBu...43..323S 25 April 2017 Robert D. Stephens Brian D. Warner January 2018 Lightcurve Analysis of L4 Trojan Asteroids at the Center for Solar System Studies 2017 July - September http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2018MPBu...45...48S The Minor Planet Bulletin 45 1 48–50 1052-8091 2018MPBu...45...48S 30 June 2018 W. Z. Wisniewski T. M. Michalowski A. W. Harris R. S. McMillan March 1995 Photoelectric Observations of 125 Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1995LPI....26.1511W Abstracts of the Lunar and Planetary Science Conference 26 1511 1995LPI....26.1511W 25 April 2017 Petr Pravec Alan W. Harris Peter Kusnirák Adrián Galád Kamil Hornoch September 2012 Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P Icarus 221 1 365–387 2012Icar..221..365P 10.1016/j.icarus.2012.07.026 25 April 2017 External links Query: D-type asteroid in the SBDB, Jet Propulsion Laboratory 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/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1583 1582 Martir 1583 1584 Fuji 001583 Category:Discoveries by Sylvain Arend Category:Named minor planets 001583 19500919