| 词条 | (7641) 1986 TT6 |
| 释义 |
| minorplanet = yes | name = (7641) {{mp|1986 TT|6}} | background = #C2FFFF | image = | image_size = | caption = | discovery_ref = [1] | discoverer = M. Antal | discovery_site = Toruń–Piwnice | discovered = 5 October 1986 | mpc_name = (7641) {{mp|1986 TT|6}} | alt_names = {{mp|1986 TT|6}}{{·}}{{mp|1975 VT|5}} {{mp|1975 XS|4}}{{·}}{{mp|1986 VP|5}} 1991 HY{{·}}{{mp|1996 RN|26}} | pronounced = | named_after = | mp_category = Jupiter trojan [1][4] {{nowrap|Greek [5][6]{{·}}background [6]}} | orbit_ref = | epoch = 23 March 2018 (JD 2458200.5) | uncertainty = 0 | observation_arc = 42.54 yr (15,539 d) | aphelion = 5.4898 AU | perihelion = 4.9398 AU | semimajor = 5.2148 AU | eccentricity = 0.0527 | period = 11.91 yr (4,350 d) | mean_anomaly = 171.71° | mean_motion = {{Deg2DMS|0.0828|sup=ms}} / day | inclination = 34.693° | asc_node = 242.06° | arg_peri = 228.81° | jupiter_moid = 0.0165 AU | tisserand = 2.6420 | mean_diameter = {{val|68.89|ul=km}} {{small|(derived)}}[4] {{val|68.97|3.2|u=km }}[10] {{val|71.84|1.64|u=km}}[11] {{val|75.28|2.43|u=km}}[12] | rotation = {{val|27.770|0.013|ul=h}}[13] | albedo = {{val|0.062|0.005}}[12] {{val|0.0647}} {{small|(derived)}}[4] {{val|0.065|0.011}}[11] {{val|0.0708|0.007}}[10] | spectral_type = D {{small|(Pan-STARRS)}}[18] D {{small|(SDSS-MOC)}}[19] C {{small|(assumed)}}[4] V–I {{=}} {{val|0.980|0.035}}[4] | abs_magnitude = {{val|9.09|0.41}}[18] 9.30[10][11][12] 9.4[1][4] }} {{mp|(7641) 1986 TT|6}}, provisional designation {{mp|1986 TT|6}}, is a large Jupiter trojan from the Greek camp, approximately {{convert|70|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 5 October 1986, by Slovak astronomer Milan Antal at the Toruń Centre for Astronomy in Piwnice, Poland.[1] The dark D-type asteroid is notably inclined and has longer-than-average rotation period of 27.8 hours.[4] It belongs to the 50 largest Jupiter trojans. Orbit and classification{{mp|1986 TT|6}} is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's {{L4}} 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.[6][32]It orbits the Sun at a distance of 4.9–5.5 AU once every 11 years and 11 months (4,350 days; semi-major axis of 5.21 AU). Its orbit has an eccentricity of 0.05 and a notably high inclination of 35° with respect to the ecliptic. The asteroid was first observed as {{mp|1975 VT|5}} at Crimea–Nauchnij in November 1975. The body's observation arc begins with its official discovery observation at the Toruń Centre.[1] Physical CharacteristicsIn the SDSS-based taxonomy, {{mp|1986 TT|6}} is a dark D-type asteroid.[19] It has also been characterized as a D-type by Pan-STARRS{{'}} survey.[4][18] Its V–I color index of 0.98 agrees with that of most Jovian D-type asteroids.[4] Rotation periodIn October 2009, a rotational lightcurve of {{mp|1986 TT|6}} was obtained from photometric observations by Italian astronomer Stefano Mottola at the Calar Alto Observatory in Spain. Lightcurve analysis gave a well-defined rotation period of 27.770 hours with a brightness amplitude of 0.40 magnitude ({{small|U=3}}).[4][13] While not being a slow rotator, its period is significantly longer than that of most larger Jupiter trojans, which have a spin rate of typically 10 hours. The body's relatively high brightness variation of 0.40 magnitude is also indicative of a non-spherical shape. Diameter and albedoAccording 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, this asteroid measures between 68.97 and 75.28 kilometers in diameter and its surface has an albedo between 0.062 and 0.071.[10][11][12] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0647 and a diameter of 68.89 kilometers based on an absolute magnitude of 9.4.[4] {{Largest Jupiter trojans}}Numbering and namingThis minor planet was numbered by the Minor Planet Center on 22 May 1997 ({{small|M.P.C. 29897}}).[45] As of 2018, it has not been named.[1] References1. ^1 2 3 4 5 6 {{cite web |title = 7641 (1986 TT6) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=7641 |accessdate = 10 June 2018}} [1][2][3][4][5][6][7][8][9][10][11][12]2. ^1 {{cite web |title = List of Jupiter Trojans |work = Minor Planet Center |date = 30 May 2018 |url = https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html |accessdate = 10 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 = 10 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 |url = https://arxiv.org/pdf/1209.1549.pdf |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 |access-date= 10 June 2018}} (online catalog) 5. ^1 2 3 {{cite web |title = Asteroid (7641) 1986 TT6 |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=7641&pc=1.1.6 |accessdate = 10 June 2018}} 6. ^1 {{cite web |title = Asteroid (7641) 1986 TT6 |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=7641 |accessdate = 10 June 2018}} 7. ^1 2 3 4 {{cite journal |first1 = E. F. |last1 = Tedesco |first2 = P. V. |last2 = Noah |first3 = M. |last3 = Noah |first4 = S. D. |last4 = Price |date = October 2004 |title = IRAS Minor Planet Survey V6.0 |url = https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab |journal = NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0 |bibcode = 2004PDSS...12.....T |accessdate = 15 June 2018}} 8. ^1 2 {{Cite journal |first1 = J. M. |last1 = Carvano |first2 = P. H. |last2 = Hasselmann |first3 = D. |last3 = Lazzaro |first4 = T. |last4 = Mothé-Diniz |date = February 2010 |title = SDSS-based taxonomic classification and orbital distribution of main belt asteroids |url = https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_I0035_5_SDSSTAX_V1_1/data/sdsstax_ast_table.tab |journal = Astronomy and Astrophysics |volume = 510 |page = 12 |bibcode = 2010A&A...510A..43C |doi = 10.1051/0004-6361/200913322 |access-date= 15 June 2018}} 9. ^1 2 3 4 5 6 7 8 9 10 11 {{cite web |title = LCDB Data for (7641) |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=7641%7C |accessdate = 10 June 2018}} 10. ^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= 15 June 2018}} (online, [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153]) 11. ^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 |url = http://iopscience.iop.org/article/10.1088/0004-6256/141/5/170/pdf |journal = The Astronomical Journal |volume = 141 |issue = 5 |page = 32 |bibcode = 2011AJ....141..170M |doi = 10.1088/0004-6256/141/5/170 |access-date= 10 June 2018}} 12. ^1 2 3 {{cite journal |display-authors = 6 |first1 = Peter |last1 = Veres |first2 = Robert |last2 = Jedicke |first3 = Alan |last3 = Fitzsimmons |first4 = Larry |last4 = Denneau |first5 = Mikael |last5 = Granvik |first6 = Bryce |last6 = Bolin |first7 = Serge |last7 = Chastel |first8 = Richard J. |last8 = Wainscoat |first9 = William S. |last9 = Burgett |first10 = Kenneth C. |last10 = Chambers |first11 = Heather |last11 = Flewelling |first12 = Nick |last12 = Kaiser |first13 = Eugen A. |last13 = Magnier |first14 = Jeff S. |last14 = Morgan |first15 = Paul A. |last15 = Price |first16 = John L. |last16 = Tonry |first17 = Christopher |last17 = Waters |date = November 2015 |title = Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results |url = https://arxiv.org/pdf/1506.00762.pdf |journal = Icarus |volume = 261 |pages = 34–47 |bibcode = 2015Icar..261...34V |doi = 10.1016/j.icarus.2015.08.007 |arxiv = 1506.00762 |access-date= 10 June 2018}} }} External links
3 : Jupiter trojans (Greek camp)|Discoveries by Milan Antal|Astronomical objects discovered in 1986 |
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