1867 Deiphobus

Dark Jupiter trojan asteroid March 2018 yes 1867 Deiphobus #C2FFFF C. U. CescoA. G. Samuel El Leoncito Complex 3 March 1971 (1867) Deiphobus 1971 EA d iː ˈ ɪ f ə b ə s'Deiphobe' in Noah Webster (1884) A Practical Dictionary of the English Language Deiphobian Deiphobus (Greek mythology) Jupiter trojanTrojanEnnomos 4 September 2017 (JD 2458000.5) 0 46.15 yr (16,858 days) 5.3511 AU 4.9040 AU 5.1276 AU 0.0436 11.61 yr (4,241 days) 229.96° 0.0849 ms / day 26.914° 283.71° 359.19° 0.1574 AU 2.7830 118.22 1.62 km122.65 km (derived)122.67 3.9 km131.31 1.87 km 58.62 0.03 hlightcurve-plots-CS358.66 0.18 h58.699 0.002 hlightcurve-plots-CS3 0.037 0.0010.0396 (derived)0.0422 0.0030.060 0.009 D (Tholen)D0 (Barucci)D (Tedesco)D (SDSS-MOC)U–B 0.232 0.060B–V 0.760 0.050V–R 0.460 0.050V–I 0.930 0.027 8.38.47 0.108.618.68 1867 Deiphobus d iː ˈ ɪ f ə b ə s is a dark Jupiter trojan from the Trojan camp, approximately 123 km mi us in diameter. It was discovered on 3 March 1971, by Argentine astronomers Carlos Cesco and A. G. Samuel at the Leoncito Astronomical Complex in Argentina, and later named after the Trojan prince Deiphobus from Greek mythology. The dark D-type asteroid is one of the largest Jupiter trojans. It is a member of the Ennomos family and has a long rotation period of 58.66 hours. Orbit and classification Deiphobus is a dark Jovian asteroid orbiting in the trailing Trojan camp at Jupiter's Lagrangian point, 60° behind its orbit in a 1:1 resonance (see Trojans in astronomy). It is a member of the Ennomos family (009), a small Jovian asteroid family with 30 known members, named after 4709 Ennomos.23 There only a few Jovian families known to date. The Ennomos family was first identified by Jakub Rozehnal and Miroslav Brož in 2011. However, a different HCM-based analysis assigns Deiphobus to the Jovian background population. It orbits the Sun at a distance of 4.9–5.4 AU once every 11 years and 7 months (4,241 days; semi-major axis of 5.13 AU). Its orbit has an eccentricity of 0.04 and an inclination of 27° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Leoncito in March 1971. Physical characteristics Deiphobus is characterized as a dark D-type asteroid in the Tholen, Barucci, Tedesco, as well as in the SDSS-based taxonomy. Lightcurves Several rotational lightcurve have been obtained since 1987, when the first photometric observations of Deiphobus by Linda French at CTIO indicated that the body has longer-than average rotation period of at least 24 hours.(U=2). In February 1994, observations by Stefano Mottola and Anders Erikson, using the ESO 1-metre telescope at La Silla Observatory in Chile, gave a slow rotation period of 58.66 0.18 hours with a brightness variation of 0.27 0.03 magnitude (U=3-). Since 2015, follow-up observations by Robert Stephens at the Center for Solar System Studies measured 58.62 and 58.699, confirming Mottola's long period (U=3-/3-),lightcurve-plots-CS3 and superseding other reported periods from fragmentary lightcurves (U=2/1).LCDB-Melita-2012 While not being a slow rotator, Deiphobus has a much longer rotation period than the vast majority of asteroids, which typically rotate between 2 and 20 hours once around their axis. Among all large Jovian asteroids, only 617 Patroclus has a longer period than Deiphobus. 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, Deiphobus measures between 118.22 and 131.31 kilometers in diameter, and its surface has an albedo between 0.037 and 0.060. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0396 and a diameter of 122.65 kilometers based on an absolute magnitude of 8.68. left Naming This minor planet was named after the Trojan warrior, Deiphobus, son of King Priam (also see 108 Hecuba and 884 Priamus). The official 1867 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3935). Notes 30em lightcurve-plots-CS3 Lightcurve plots of (1867) Deiphobus from Nov 2015, Feb 2017 by Robert Stephens at the Center for Solar System Studies U81. Quality code is 3/3- (lightcurve rating at CS3). Summary figures at the LCDB and CS3. LCDB-Melita-2012 Melita (2012), gives a rotation period of 51.70 0.05. Summary figures listed at LCDB References 30em 2017-04-28 last obs. JPL Small-Body Database Browser: 1867 Deiphobus (1971 EA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001867 Jet Propulsion Laboratory 9 June 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 150 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1868 (1867) Deiphobus 1867 Deiphobus (1971 EA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1867 13 June 2018 List of Jupiter Trojans Minor Planet Center 20 August 2016 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 12 December 2016 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 (1867) Deiphobus – Proper elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=1867&pc=1.1.6 13 June 2018 Asteroid 1867 Deiphobus Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1867+Deiphobus 13 June 2018 13 June 2018 https://web.archive.org/web/20180613234901/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1867+Deiphobus dead D. Nesvorný M. Broz V. Carruba December 2014 Identification and Dynamical Properties of Asteroid Families Asteroids IV 297–321 2015aste.book..297N 10.2458/azu_uapress_9780816532131-ch016 1502.01628 9780816532131 119280014 M. Broz J. Rozehnal June 2011 Eurybates – the only asteroid family among Trojans? Monthly Notices of the Royal Astronomical Society 414 1 565–574 2011MNRAS.414..565B 10.1111/j.1365-2966.2011.18420.x free 1109.1109 118743237 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) 1867 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 (online, AcuA catalog p. 153) French, L. M. November 1987 Rotation properties of four L5 Trojan asteroids from CCD photometry https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1987Icar...72..325F Icarus 72 2 325–341.MIT–supportedresearch 0019-1035 1987Icar...72..325F 10.1016/0019-1035(87)90178-3 12 December 2016 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 Linda M. French Robert D. Stephens Daniel R. Coley Ralph Megna Lawrence H. Wasserman July 2012 Photometry of 17 Jovian Trojan Asteroids https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39..183F The Minor Planet Bulletin 39 3 183–187 1052-8091 2012MPBu...39..183F 12 December 2016 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 https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..265S The Minor Planet Bulletin 43 3 265–270 1052-8091 2016MPBu...43..265S 12 December 2016 Robert D. Stephens Daniel R. Coley July 2017 Lightcurve Analysis of Trojan Asteroids at the Center for Solar System Studies 2017 January - March The Minor Planet Bulletin 44 3 252–257 32455404 7243922 1052-8091 2017MPBu...44..252S 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 Long-term evolution of asteroid families among Jovian Trojans, Jakub Rozehnal and Miroslav Brož (2014) 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 (1)-(5000) – Minor Planet Center 1867 1866 Sisyphus 1867 1868 Thersites 001867 001867 Category:Discoveries by Carlos Ulrrico Cesco Category:Named minor planets 001867 19710303