11395 Iphinous

Jupiter trojan from the Greek camp April 2020 yes 11395 Iphinous #C2FFFF LINEAR Lincoln Lab's ETS 15 December 1998 (11395) Iphinous 1998 XN 771992 GF 3 Iphinoian Iphinous(Greek mythology) Jupiter trojanGreekbackground 23 March 2018 (JD 2458200.5) 0 26.63 yr (9,727 d) 5.5632 AU 4.8590 AU 5.2111 AU 0.0676 11.90 yr (4,345 d) 316.51° 0.0829 ms / day 24.141° 213.24° 118.07° 0.0684 AU 2.8210 64.51 km (derived)64.71 3.1 km67.78 1.84 km68.98 1.12 km 13.696 0.06 h13.70 0.06 h (poor)17.383 0.005 hlightcurve-plots-Stephens17.44 0.01 hlightcurve-plots-Stephens17.89 0.005 h (poor)lightcurve-plots-Stephens 0.045 0.0070.0510 (derived)0.061 0.0040669 0.007 C (assumed) 9.509.8 11395 Iphinous (provisional designation 1998 XN 77) is a large Jupiter trojan from the Greek camp approximately 66 km mi off 2 us in diameter. It was discovered on 15 December 1998, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The dark asteroid has a rotation period of 17.4 hours and possibly a spherical shape. The body is one of the 50 largest Jupiter trojans. It was named from Greek mythology after the Achaean soldier Iphinous who was killed by Glaucus in the Trojan War. Orbit and classification Iphinous is a Jovian asteroid orbiting in the leading Greek camp at Jupiter's Lagrangian point, 60° ahead of the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid in the Jovian background population. The asteroid orbits the Sun at a distance of 4.9–5.6 AU once every 11 years and 11 months (4,345 days; semi-major axis of 5.21 AU). Its orbit has an eccentricity of 0.07 and an inclination of 24° with respect to the ecliptic. The body's observation arc begins with a precovery taken at the Siding Spring Observatory in February 1991, nearly 8 years prior to its official discovery observation at Socorro. Naming This minor planet was numbered on 31 August 1999 (M.P.C. 35589). On 14 May 2021, the object was named by the Working Group for Small Bodies Nomenclature (WGSBN) after Iphinous from Greek mythology. An Achaean soldier who participated in the Trojan War, Iphinous was killed by Glaucus in hand-to-hand combat during the siege of Troy. Physical characteristics Iphinous is a generically assumed C-type asteroid. Many if not most Jupiter trojans show an even darker D or P-type spectrum. Rotation period In 2009 and 2010, two fragmentary lightcurves of Iphinous were obtained from photometric observations by Stefano Mottola at the Calar Alto Observatory in Spain. Lightcurve analysis gave a tentative rotation period of 13.696 and 13.70 hours with a brightness variation of 0.14 and 0.06 magnitude, respectively (U=2-/1+). During 2015–2017, three additional photometric observation were made at the Californian Center for Solar System Studies by Robert Stephens, Daniel Coley and Brian Warner in collaboration with Linda French from Illinois Wesleyan University. The two best-rated lightcurves gave a period of 17.383 and 17.44 with an amplitude of 0.08 and 0.11 magnitude, respectively, indicating that the body has a nearly spherical shape (U=3-/3-).lightcurve-plots-Stephens Diameter and albedo According to the surveys carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Iphinous measures between 64.71 and 68.98 kilometers in diameter and its surface has an albedo between 0.045 and 0.067. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0510 and a diameter of 64.51 kilometers based on an absolute magnitude of 9.8. Notes lightcurve-plots-Stephens Three lightcurve plots of (11395) Iphinous by Robert Stephens and collaborators at the Center for Solar System Studies U81 in Landers, California. Plots from 2015 (poor), 2016 and 2017. Summary figures at the LCDB. References 30em 2017-09-28 last obs. JPL Small-Body Database Browser: 11395 (1998 XN77) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2011395 Jet Propulsion Laboratory 31 May 2018 11395 (1998 XN77) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=11395 31 May 2018 List of Jupiter Trojans Minor Planet Center 2 February 2018 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 31 May 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 31 May 2018 WGSBN Bulletin Archive Working Group for Small Bodies Nomenclature 14 May 2021 https://www.wgsbn-iau.org/files/Bulletins/index.html 16 May 2021 (Bulletin #1) 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 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 (11395) 1998 XN77 – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=11395&pc=1.1.6 31 May 2018 Asteroid (11395) 1998 XN77 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=11395 31 May 2018 3 October 2020 https://web.archive.org/web/20201003110019/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=11395 dead 11395 31 May 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) 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 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 The Minor Planet Bulletin 43 4 323–331 1052-8091 2016MPBu...43..323S Robert D. Stephens Brian D. Warner October 2017 Lightcurve Analysis of L4 Trojan Asteroids at the Center for Solar System Studies 2017 April–June The Minor Planet Bulletin 44 4 312–316 1052-8091 2017MPBu...44..312S External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center 11395 2011395 11395 011395 011395 011395 Category:Named minor planets 19981215