11351 Leucus

Mid-sized asteroid sharing Jupiter's orbit June 2018 yes 11351 Leucus #C2FFFF 11351 Leucus lightcurve shape model 2020.jpg Shape model of Leucus viewed from multiple orthogonal perspectives SCAP Beijing Xinglong Obs. 12 October 1997 (11351) Leucus 1997 TS 251996 VP 39 ' lj u: k ə sNoah Webster (1884) A Practical Dictionary of the English Language Leucus (Greek mythology) Jupiter trojanGreekbackground 25 February 2023 (JD 2460000.5) 0 25 July 1982 5.652 AU 4.953 AU 5.302 AU 0.0659 12.21 yr (4,460 d) 43.784° 0.0807243 ms / day 11.546° 251.087° 160.955° 0.0942 AU 2.955 60.8 x 39.2 x 27.8 km 41 0.7 km (surface equivalent) 445.683 0.007 h +77 ° 208 ° 13 ° (wrt ecliptic)10 ° (wrt orbit) 0.043 0.002 DB–V 0.739 0.044V–R 0.498 0.044V–I 0.900 0.057 10.979 0.037 11351 Leucus ' lj u: k ə s is a mid-sized Jupiter trojan from the Greek camp, approximately 40 km mi off 2 us in diameter. It is a target of the Lucy mission, scheduled for a flyby in April 2028. The assumed D-type asteroid is an exceptionally slow rotator with a rotation period of 466 hours. It was discovered on 12 October 1997 by the Beijing Schmidt CCD Asteroid Program (SCAP) at Xinglong Station in the Chinese province of Hebei, and later named after the Achaean warrior Leucus from Greek mythology. Orbit and classification Leucus is a dark Jupiter trojan asteroid in a 1:1 orbital resonance with Jupiter. It is located 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. It orbits the Sun at a distance of 5.0–5.6 AU once every 12 years and 2 months (4,440 days; semi-major axis of 5.29 AU). Its orbit has an eccentricity of 0.06 and an inclination of 12° with respect to the ecliptic. The body's observation arc begins with a precovery taken at the Siding Spring Observatory in July 1982, more than 15 years prior to its official discovery observation at Xinglong. Exploration Lucy mission target Leucus is planned to be visited by the Lucy spacecraft, which launched in 2021. The flyby is scheduled for 18 April 2028, and will approach the asteroid to a distance of 1000 km mi at a relative velocity of 5.9 km/s mph. Physical characteristics thumb|left|Silhouettes of Leucus observed in occultation events from 2017 to 2019, each with a shape model overlaid to fit the chords. Leucus is a D-type asteroid, which is the dominant spectral type among the Jupiter trojans, with the remainder being mostly carbonaceous C-type and primitive P-type asteroids. Slow rotator During spring 2013, a rotational lightcurve of Leucus was obtained from photometric observations made by astronomers Robert Stephens and Daniel Coley at the Center for Solar System Studies (CS3), California, using a 0.35/0.4-meter Schmidt-Cassegrain telescope. The lightcurve showed an exceptionally slow rotation period of 513.7 hours with a brightness variation of 0.53 in magnitude (U=2+). No evidence of a non-principal axis rotation (NPAR) was found. It is one of the slowest rotators known to exist. In preparation for the planned visit by the Lucy spacecraft, Leucus was once again observed by astronomers Marc Buie at SwRI and Stefano Mottola at DLR in 2016. The obtained bimodal lightcurve gave a somewhat shorter period of 440 hours and an amplitude of 0.7 magnitude. Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Leucus has a low albedo of 0.06 and 0.08, with a diameter of 42.1 and 34.2 kilometers, respectively. The Collaborative Asteroid Lightcurve Link derives a lower albedo of 0.05 and a diameter of 42.1 kilometers, in accordance with the result obtained by IRAS. Naming This minor planet was named from Greek mythology, after the Achaean warrior Leucus in Homer's Iliad. He was a companion of Odysseus. Leucus was killed during the Trojan War by Antiphus, one of the fifty sons of King Priam of Troy.Homer, Iliad, 4. 491 The approved naming citation was published by the Minor Planet Center on 22 February 2016 (M.P.C. 98711). References 30em 2017-06-07 last obs. JPL Small-Body Database Browser: 11351 Leucus (1997 TS25) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2011351 Jet Propulsion Laboratory 22 June 2018 11351 Leucus (1997 TS25) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=11351 22 June 2018 List of Jupiter Trojans Minor Planet Center V. Carruba 1 June 2018 https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html 22 June 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 22 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 (11351) Leucus – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=11351&pc=1.1.6 22 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 NASA announces five Discovery proposals selected for further study 30 September 2015 Casey Dreier Emily Lakdawalla The Planetary Society http://www.planetary.org/blogs/casey-dreier/2015/09301336-discovery-downselect.html 12 April 2017 H. F. Levison C. Olkin K. S. Noll S. Marchi Lucy Team March 2017 Lucy: Surveying the Diversity of the Trojan Asteroids: The Fossils of Planet Formation https://www.hou.usra.edu/meetings/lpsc2017/pdf/2025.pdf 48th Lunar and Planetary Science Conference 1964 2025 2017LPI....48.2025L 13 April 2017 Marc W. Buie Amanda Marie Zangari Simone Marchi Stefano Mottola Harold F. Levison October 2016 Ground-based characterization of Leucus and Polymele, two fly-by targets of the Lucy Discovery mission American Astronomical Society 48 208.06 2016DPS....4820806B 11351 22 June 2018 Linda M. French Robert, D. Stephens Daniel R. Coley Lawrence H. Wasserman Faith Vilas Daniel La Rocca October 2013 A Troop of Trojans: Photometry of 24 Jovian Trojan Asteroids The Minor Planet Bulletin 40 4 198–203 1052-8091 2013MPBu...40..198F O. R. Hainaut H. Boehnhardt S. Protopapa October 2012 Colours of minor bodies in the outer solar system. II. A statistical analysis revisited Astronomy and Astrophysics 546 20 2012A&A...546A.115H 10.1051/0004-6361/201219566 1209.1896 54776793 Stefano Mottola Stephan Hellmich Marc W. Buie Amanda M. Zangari Simone Marchi Michael E. Brown Harold F. Levison Convex Shape and Rotation Model of Lucy Target (11351) Leucus from Lightcurves and Occultations The Planetary Science Journal December 2020 1 3 73 14 free 10.3847/PSJ/abb942 2009.08951 2020PSJ.....1...73M 221802440 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 Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center Asteroid 11351 Leucus at the Small Bodies Data Ferret 11351 11350 Teresa 11351 11352 Koldewey Category:Jupiter trojans (Greek camp) Category:Discoveries by SCAP Leucus Category:Slow rotating minor planets Category:Minor planets to be visited by spacecraft Category:Objects observed by stellar occultation 19971012