1404 Ajax

Asteroid June 2018 yes 1404 Ajax #C2FFFF 001404-asteroid shape model (1404) Ajax.png Modelled shape of Ajax from its lightcurve K. Reinmuth Heidelberg Obs. 17 August 1936 (1404) Ajax 1936 QW Ajantian ə ˈ dZ æ n t i ə n ˈ eɪ dʒ æ k s'Polydamas' in Noah Webster (1884) A Practical Dictionary of the English Language Ajax (Greek mythology) Jupiter trojanGreekbackground 23 March 2018 (JD 2458200.5) 0 81.76 yr (29,864 d) 5.9044 AU 4.6992 AU 5.3018 AU 0.1137 12.21 yr (4,459 d) 247.16° 0.0807 ms / day 18.005° 332.92° 59.772° 0.0433 AU 2.8890 81.43 km (derived)81.69 3.2 km83.99 1.28 km96.34 2.25 km 28.4 h29.38 0.01 h34 h 0.048 0.0090.050 0.0030.0508 (derived)0.0665 0.005 C (assumed)V–I 0.960 0.032 9.009.39.87 0.47 1404 Ajax ˈ eɪ dʒ æ k s is a carbonaceous Jupiter trojan from the Greek camp, approximately 83 km mi off 2 us kilometers in diameter. It was discovered on 17 August 1936, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and named after the legendary warrior Ajax from Greek mythology. The assumed C-type asteroid belongs to the 40 largest Jupiter trojans and has a longer than average rotation period of 29.4 hours. Orbit and classification Ajax is a C-type asteroid, that orbits in the leading Greek camp at Jupiter's Lagrangian point, 60° ahead of its orbit (see Trojans in astronomy). It is also a non-family asteroid in the Jovian background population. Jupiter trojans are thought to have been captured into their orbits during or shortly after the early stages of the formation of the Solar System. More than 4,500 Jupiter trojans in the Greek camp and 7,000 in total have been discovered. Ajax orbits the Sun at a distance of 4.7–5.9 AU once every 12 years and 3 months (4,459 days; semi-major axis of 5.3 AU). Its orbit has an eccentricity of 0.11 and an inclination of 18° with respect to the ecliptic plane. The body's observation arc begins at Heidelberg 6 days after its official discovery observations in August 1936. Physical characteristics Ajax is an assumed, carbonaceous C-type asteroid, while its V–I color index of 0.96 agrees with most D-type asteroids, which is the dominant spectral type among the large Jupiter trojans. Rotation period In December 2010, a rotational lightcurve of Ajax was obtained from photometric observations taken by Robert Stephens at the Goat Mountain Astronomical Research Station G79 in California. Lightcurve analysis gave a rotation period of 29.38 hours with a brightness variation of 0.30 magnitude (U=3-), superseding fragmentary photometric measurements by Richard P. Binzel (1988), and by Roberto Crippa and Federico Manzini (2009) at the Sozzago Astronomical Station A12, which gave a period of 28.4 and 34 hours, respectively (U=1/2-). 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, Ajax measures between 81.69 and 96.34 kilometers in diameter and its surface has an albedo between 0.048 and 0.0665. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0508 and a diameter of 81.43 kilometers based on an absolute magnitude of 9.3. Naming This minor planet was named for Ajax the Great, a Greek warrior of great strength and courage in the Trojan War. He is the half brother of Teucer and son of king Telamon, who kills himself because Achilles armor was awarded to Odysseus. The Jupiter trojans 588 Achilles, 1143 Odysseus and 1749 Telamon and 2797 Teucer are all named after these figures from Greek mythology. The official naming of Ajax was first cited in The Names of the Minor Planets by Paul Herget in 1955 (H 127). References 30em 2018-05-23 last obs. JPL Small-Body Database Browser: 1404 Ajax (1936 QW) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001404 Jet Propulsion Laboratory 13 June 2018 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 113 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1405 (1404) Ajax 1404 Ajax (1936 QW) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1404 13 June 2018 List of Jupiter Trojans Minor Planet Center 30 May 2018 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 13 June 2018 Asteroids and comets rotation curves – (1404) Ajax Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001404 11 January 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001404 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 (1404) Ajax – Proper elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=1404&pc=1.1.6 13 June 2018 Asteroid 1404 Ajax Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1404+Ajax 13 June 2018 13 June 2018 https://web.archive.org/web/20180613112035/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1404%20Ajax dead 1404 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) Richard P. Binzel Linda M. Sauter February 1992 Trojan, Hilda, and Cybele asteroids – New lightcurve observations and analysis http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1992Icar...95..222B Icarus 95 2 222–238 0019-1035 1992Icar...95..222B 10.1016/0019-1035(92)90039-A 11 January 2017 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 11 January 2017 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 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 1404 1403 Idelsonia 1404 1405 Sibelius 001404 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19360817