| 词条 | 11509 Thersilochos |
| 释义 |
| minorplanet = yes | name = 11509 Thersilochos | background = #C2FFFF | image = | image_size = | caption = | discovery_ref = [1] | discoverer = E. W. Elst | discovery_site = La Silla Obs. | discovered = 15 November 1990 | mpc_name = (11509) Thersilochos | alt_names = {{mp|1990 VL|6}}{{·}}{{mp|1989 SN|7}} {{mp|1989 VM|5}} | pronounced = {{IPAc-en|θ|ə|r|ˈ|s|ɪ|l|ə|k|ə|s}} {{Respell|thər|SIL|ə|kəs}} | named_after = Thersilochus [1] {{small|(Greek mythology)}} | mp_category = Jupiter trojan [1] {{nowrap|Trojan [5]{{·}}background [6]}} | orbit_ref = | epoch = 23 March 2018 (JD 2458200.5) | uncertainty = 0 | observation_arc = 28.64 yr (10,462 d) | aphelion = 5.9165 AU | perihelion = 4.4429 AU | semimajor = 5.1797 AU | eccentricity = 0.1422 | period = 11.79 yr (4,306 d) | mean_anomaly = 182.56° | mean_motion = {{Deg2DMS|0.0836|sup=ms}} / day | inclination = 18.502° | asc_node = 214.70° | arg_peri = 128.51° | jupiter_moid = 0.0868 AU | tisserand = 2.8780 | mean_diameter = {{val|49.96|0.76|u=km}}[8] {{val|56.23|4.79|u=km}}[9] | rotation = {{val|17.367|0.015|u=h}}[10] | albedo = {{val|0.051|0.009}}[9] {{val|0.065|0.010}}[8] | spectral_type = C {{small|(assumed)}}[13] | abs_magnitude = 10.10[1][8][9] {{val|10.270|0.004}} {{small|(R)}}[18] }}11509 Thersilochos ({{IPAc-en|θ|ə|r|ˈ|s|ɪ|l|ə|k|ə|s}} {{Respell|thər|SIL|ə|kəs}}), provisional designation {{mp|1990 VL|6}}, is a Jupiter trojan from the Trojan camp, approximately {{convert|50|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 15 November 1990, by Belgian astronomer Eric Elst at the La Silla Observatory in northern Chile.[1] The dark Jovian asteroid belongs to the 100 largest Jupiter trojans and has a rotation period of 17.4 hours.[13] It was named after the Trojan warrior Thersilochus from Greek mythology.[1] Orbit and classificationThersilochos is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's {{L5}} Lagrangian point, 60° behind its orbit {{cross reference|(see Trojans in astronomy)}}. It is also a non-family asteroid of the Jovian background population.[6] It orbits the Sun at a distance of 4.4–5.9 AU once every 11 years and 9 months (4,306 days; semi-major axis of 5.18 AU). Its orbit has an eccentricity of 0.14 and an inclination of 19° with respect to the ecliptic.The body's observation arc begins with its first observation as {{mp|1989 SN|7}} at Palomar Observatory in September 1989, just two months prior to its official discovery observation at La Silla.[1] Physical characteristicsThersilochos is an assumed C-type asteroid, while the majority of the larger Jovian asteroids are D-types.[13]Rotation periodIn July 2007, a rotational lightcurve of Thersilochos was obtained from a total of six nights of photometric observations by Italian astronomer Stefano Mottola at the Calar Alto Observatory in Spain. Lightcurve analysis gave a well-defined rotation period of {{val|17.367|0.015}} hours with a brightness variation of 0.27 magnitude ({{small|U=3}}).[10][13] Follow-up observations in the R-band by astronomers at the Palomar Transient Factory in November 2013, and by Daniel Coley at the Center for Solar System Studies in December 2014, gave two concurring periods of 17.329 and 17.389 hours ({{small|U=3/2}}).[13][18][30]{{efn|name=lightcurve-plots-CS3}} Diameter and albedoAccording to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Thersilochos between 49.96 and 56.23 kilometers in diameter and its surface has an albedo of 0.065 and 0.051, respectively.[8][9] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 53.16 kilometers based on an absolute magnitude of 10.1.[13] {{Largest Jupiter trojans}}NamingThis minor planet was named from Greek mythology after the Trojan warrior Thersilochus, who fought with Hector at the battle for the dead body of Patroclus and was later slain by Achilles.[1] The official naming citation was published by the Minor Planet Center on 6 January 2003 ({{small|M.P.C. 47299}}).[35] Notes{{notelist|refs={{efn|name=lightcurve-plots-CS3|1=Lightcurve plots of (11509) Thersilochos from Dec 2014 by Daniel Coley at the Center for Solar System Studies {{Obscode|U80}}. Quality code is 3- (lightcurve rating at CS3). Summary figures at the LCDB and CS3.}}}} References1. ^1 2 3 4 5 6 7 8 {{cite web |title = 11509 Thersilochos (1990 VL6) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=11509 |accessdate = 20 June 2018}} [1][2][3][4][5][6][7][8][9][10]2. ^1 {{cite web |title = List of Jupiter Trojans |work = Minor Planet Center |first3 = V. |last3 = Carruba |date = 1 June 2018 |url = https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html |accessdate = 20 June 2018}} 3. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 20 June 2018}} 4. ^1 2 3 4 {{cite journal |first1 = T. |last1 = Grav |first2 = A. K. |last2 = Mainzer |first3 = J. M. |last3 = Bauer |first4 = J. R. |last4 = Masiero |first5 = C. R. |last5 = Nugent |date = November 2012 |title = WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy |journal = The Astrophysical Journal |volume = 759 |issue = 1 |page = 10 |bibcode = 2012ApJ...759...49G |doi = 10.1088/0004-637X/759/1/49 |arxiv = 1209.1549 }} (online catalog) 5. ^1 2 {{cite web |title = Asteroid (11509) Thersilochos – Proper Elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=11509&pc=1.1.6 |access-date= 20 June 2018}} 6. ^1 2 3 4 5 6 {{cite web |title = LCDB Data for (11509) Thersilochos |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=11509%7CThersilochos |accessdate = 20 June 2018}} 7. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = Fumihiko |last1 = Usui |first2 = Daisuke |last2 = Kuroda |first3 = Thomas G. |last3 = Müller |first4 = Sunao |last4 = Hasegawa |first5 = Masateru |last5 = Ishiguro |first6 = Takafumi |last6 = Ootsubo |first7 = Daisuke |last7 = Ishihara |first8 = Hirokazu |last8 = Kataza |first9 = Satoshi |last9 = Takita |first10 = Shinki |last10 = Oyabu |first11 = Munetaka |last11 = Ueno |first12 = Hideo |last12 = Matsuhara |first13 = Takashi |last13 = Onaka |date = October 2011 |title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey |url = http://pasj.oxfordjournals.org/content/63/5/1117.full.pdf+html |journal = Publications of the Astronomical Society of Japan |volume = 63 |issue = 5 |pages = 1117–1138 |bibcode = 2011PASJ...63.1117U |doi = 10.1093/pasj/63.5.1117 |access-date= 20 June 2018}} (online, [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153]) 8. ^1 {{Cite journal |first1 = Robert D. |last1 = Stephens |first2 = Daniel R. |last2 = Coley |first3 = Linda M. |last3 = French |date = July 2015 |title = Dispatches from the Trojan Camp - Jovian Trojan L5 Asteroids Observed from CS3: 2014 October - 2015 January |journal = The Minor Planet Bulletin |volume = 42 |issue = 3 |pages = 216–224 |issn = 1052-8091 |bibcode = 2015MPBu...42R.216S }} 9. ^1 2 {{cite journal |display-authors = 6 |first1 = Adam |last1 = Waszczak |first2 = Chan-Kao |last2 = Chang |first3 = Eran O. |last3 = Ofek |first4 = Russ |last4 = Laher |first5 = Frank |last5 = Masci |first6 = David |last6 = Levitan |first7 = Jason |last7 = Surace |first8 = Yu-Chi |last8 = Cheng |first9 = Wing-Huen |last9 = Ip |first10 = Daisuke |last10 = Kinoshita |first11 = George |last11 = Helou |first12 = Thomas A. |last12 = Prince |first13 = Shrinivas |last13 = Kulkarni |date = September 2015 |title = Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry |journal = The Astronomical Journal |volume = 150 |issue = 3 |page = 35 |bibcode = 2015AJ....150...75W |doi = 10.1088/0004-6256/150/3/75 |arxiv = 1504.04041 }} 10. ^1 2 {{cite journal |display-authors = 6 |first1 = Stefano |last1 = Mottola |first2 = Mario |last2 = Di Martino |first3 = Anders |last3 = Erikson |first4 = Maria |last4 = Gonano-Beurer |first5 = Albino |last5 = Carbognani |first6 = Uri |last6 = Carsenty |first7 = Gerhard |last7 = Hahn |first8 = Hans-Josef |last8 = Schober |first9 = Felix |last9 = Lahulla |first10 = Marco |last10 = Delbò |first11 = Claes-Ingvar |last11 = Lagerkvist |date = May 2011 |title = Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects |journal = The Astronomical Journal |volume = 141 |issue = 5 |page = 32 |bibcode = 2011AJ....141..170M |doi = 10.1088/0004-6256/141/5/170 }} }} External links
5 : Jupiter trojans (Trojan camp)|Discoveries by Eric Walter Elst|Minor planets named from Greek mythology|Named minor planets|Astronomical objects discovered in 1990 |
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