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词条 2207 Antenor
释义

  1. Orbit and classification

  2. Naming

  3. Physical characteristics

      Lightcurves    Unconfirmed satellite    Diameter and albedo  

  4. Notes

  5. References

  6. External links

{{Infobox planet
| minorplanet = yes
| name = 2207 Antenor
| background = #C2FFFF
| image =
| image_size =
| caption =
| discovery_ref =  [1]
| discovered = 19 August 1977
| discoverer = N. Chernykh
| discovery_site = {{nowrap|Crimean Astrophysical Obs.}}
| mpc_name = (2207) Antenor
| alt_names = {{mp|1977 QH|1}}{{·}}1959 EM
{{mp|1971 BE|1}}{{·}}1978 UU
| pronounced = {{IPAc-en|æ|n|ˈ|t|iː|n|ɔːr}}{{·}}{{respell|ann|TEE|nor}}
| named_after = Antenor {{small|(Greek mythology)}}[2]
| mp_category = Jupiter trojan [1][5]
{{nowrap|Trojan [6][7]{{·}}background [7]}}
| orbit_ref =  
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 0
| observation_arc = 59.20 yr (21,622 d)
| aphelion = 5.2316 AU
| perihelion = 5.0584 AU
| semimajor = 5.1450 AU
| eccentricity = 0.0168
| period = 11.67 yr (4,263 d)
| mean_anomaly = 73.993°
| mean_motion = {{Deg2DMS|0.0845|sup=ms}} / day
| inclination = 6.8058°
| asc_node = 159.14°
| arg_peri = 304.18°
| jupiter_moid = 0.202 AU
| tisserand = 2.9860
| satellites = 1 {{small|(unconfirmed)}}[10]
| mean_diameter = {{val|85.11|3.7|ul=km}}[11]
{{val|91.32|2.22|u=km}}[12]
{{val|97.66|0.50|u=km}}[13]
| rotation = {{val|7.906|0.009|ul=h}}[14]{{efn|name=lightcurve-plots-Stephens}}
{{val|7.960|0.0103|u=h}} {{small|(S)}}[15]
{{val|7.966|0.0055|u=h}} {{small|(R)}}[15]
{{val|7.964|0.002|u=h}}[17]{{efn|name=lightcurve-plots-Stephens}}
{{val|7.965|0.004|u=h}}[18]
{{val|8.01|u=h}}[19]
| albedo = {{val|0.051|0.003}}[13]
{{val|0.059|0.003}}[12]
{{val|0.0678|0.006}}[11]
| spectral_type = D {{small|(Tholen)}}[5]
D0 {{small|(Barucci)}}[25]
U–B {{=}} {{val|0.232|038}}
B–V {{=}} {{val|0.770|0.050}}[27]
V–R {{=}} {{val|0.450|0.030}}[27]
V–I {{=}} {{val|0.950|0.026}}[5]
| abs_magnitude = {{val|8.863|0.002}} {{small|(R)}}[15]
8.89[1][5][11][12][13]
{{val|9.16|0.19}}[37]
{{val|9.304|0.002}} {{small|(S)}}[15]
}}2207 Antenor ({{IPAc-en|æ|n|ˈ|t|iː|n|ɔːr}} {{respell|ann|TEE|nor}}), provisional designation {{mp|1977 QH|1}}, is a large Jupiter trojan from the Trojan camp, approximately {{convert|92|km|mi|abbr=off|sp=us}} in diameter. It was discovered on 19 August 1977, by Russian astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula.[1] The dark D-type asteroid is one of the 30 largest Jupiter trojans and has a rotation period of 7.97 hours.[5] It was named for the Trojan hero and sage Antenor, from Greek mythology.[2] In October 2018, it was reported that Antenor is likely a binary system. If confirmed, it would be 5th known binary Jupiter trojan.[10]

Orbit and classification

Antenor is a dark Jovian asteroid orbiting in the trailering Trojan camp at Jupiter's {{L5}} Lagrangian point, 60° behind the Gas Giant's orbit in a 1:1 resonance {{cross reference|(see Trojans in astronomy)}}. It is also a non-family asteroid from the Jovian background population.[7][25]

It orbits the Sun at a distance of 5.1–5.2 AU once every 11 years and 8 months (4,263 days; semi-major axis of 5.15 AU). Its orbit has an eccentricity of 0.02 and an inclination of 7° with respect to the ecliptic. The asteroid was first observed in a precovery taken at Lowell Observatory in March 1959. The body's observation arc begins with its official discovery observation at Nauchnij in August 1977.[1]

Naming

This minor planet is named after Antenor, one of the wisest of the elders and counselor of King Priam of Troy. Sympathetic to a negotiated peace with the Greeks, he advised his countrymen to return Helen of Troy to Menelaus during the Trojan War.[2] {{cross reference|(The minor planets 884 Priamus, 101 Helena and 1647 Menelaus are also named after these figures from Greek mythology.)}} In later accounts, Antenor was made an open traitor, who unsealed the gates of Troy to the Greek enemy. The official {{MoMP|2207|naming citation}} was published by the Minor Planet Center on 1 March 1981 ({{small|M.P.C. 5849}}).[48]

Physical characteristics

Antenor is classified as a dark D-type asteroid in the Tholen and Barucci taxonomy (latter as "D0").[25]

Lightcurves

The first rotational lightcurves of Antenor were obtained from photometric observations in October 1989, by astronomers Mario Di Martino and Maria Gonano–Beurer with the now decommissioned ESO 1-metre telescope at La Silla in Chile.[18][19] In April 1969, a follow-up observation by Mottola gave the so-far best-rated rotation period of in 7.965 hours with a brightness variation of 0.09 magnitude ({{small|U=2+}}).[5][18]

In September 2012, by astronomers at the Palomar Transient Factory derived two concurring period of {{val|7.960}} {{val|7.964}} hours with an amplitude of 0.12 and 0.15 in the R- and S-band respectively ({{small|U=2/2}}).[5][15] Between 2016 and 2018, observation by Robert Stephens at the Center for Solar System Studies, California, gave rotation period of 7.906, 7.964 hours with an amplitude of 0.09 ({{small|U=2+/2+/n.a.}}).[14][17]{{efn|name=lightcurve-plots-Stephens}}

Unconfirmed satellite

In October 2018, Stephens, in collaboration with Brian Warner {{Obscode|716}} and several other European observers including Amadeo Aznarand {{Obscode|Z95}}/{{Obscode|J42}} and Vladimir Benishek at Belgrade Observatory, reported that Antenor is likely a binary system. An orbital period for the suspected minor-planet moon could not be determined. If confirmed, it would be 5th known binary Jupiter trojan.[10]

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, Antenor measures between 85.11 and 97.66 kilometers in diameter and its surface has an albedo between 0.051 and 0.0678.[11][12][13] The Collaborative Asteroid Lightcurve Link an albedo of 0.0678 and a diameter of 85.11 kilometers based on an absolute magnitude of 8.89.[5]

{{Largest Jupiter trojans}}

Notes

{{notelist|refs={{efn|name=lightcurve-plots-Stephens|1=Lightcurve plots of (2207) Antenor from Feb 2016, Apr 2017 and Jan 2018 by Robert Stephens at the Center for Solar System Studies {{Obscode|U81}}. Quality code is 3/3-/3 (lightcurve rating at CS3). Summary figures at the LCDB and CS3.}}

}}

References

1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (2207) Antenor |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 179 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_2208 |chapter = (2207) Antenor }}
2. ^1 2 3 4 5 {{cite web |title = 2207 Antenor (1977 QH1) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2207 |accessdate = 12 June 2018}}
3. ^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 = 12 June 2018}}
4. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 6 June 2018}}
5. ^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)
6. ^1 2 3 {{cite web |title = Asteroid (2207) Antenor – Proper elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=2207&pc=1.1.6 |accessdate = 5 June 2018}}
7. ^1 2 3 {{cite web |title = Asteroid 2207 Antenor |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=2207+Antenor |accessdate = 12 June 2018}}
8. ^1 2 3 4 5 6 7 8 {{cite web |title = LCDB Data for (2207) Antenor |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=2207%7CAntenor |accessdate = 12 June 2018}}
9. ^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 |pages = IRAS-A-FPA-3-RDR-IMPS-V6.0 |bibcode = 2004PDSS...12.....T |accessdate = 15 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 |first1 = M. |last1 = Gonano |first2 = M. |last2 = di Martino |first3 = S. |last3 = Mottola |first4 = G. |last4 = Neukum |date = December 1990 |title = Physical study of outer belt asteroids |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1991AdSpR..11..197G |journal = Space Dust and Debris; Proceedings of the Topical Meeting of the Interdisciplinary Scientific Commission B /Meetings B2 |volume = 11 |issue = 12 |pages = 197–200 |issn = 0273-1177 |bibcode = 1991AdSpR..11..197G |doi = 10.1016/0273-1177(91)90563-Y |access-date= 12 June 2018}}
12. ^1 2 3 4 5 {{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 }}
13. ^1 2 {{Cite journal |first1 = Robert D. |last1 = Stephens |first2 = Daniel R. |last2 = Coley |first3 = Linda M. |last3 = French |date = July 2016 |title = A Report from the L5 Trojan Camp - Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..265S |journal = The Minor Planet Bulletin |volume = 43 |issue = 3 |pages = 265–270 |issn = 1052-8091 |bibcode = 2016MPBu...43..265S |access-date= 12 June 2018}}
14. ^1 2 {{Cite journal |first1 = Robert D. |last1 = Stephens |first2 = Daniel R. |last2 = Coley |date = July 2017 |title = Lightcurve Analysis of Trojan Asteroids at the Center for Solar System Studies 2017 January - March |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017MPBu...44..252S |journal = The Minor Planet Bulletin |volume = 44 |issue = 3 |pages = 252–257 |issn = 1052-8091 |bibcode = 2017MPBu...44..252S |access-date= 12 June 2018}}
15. ^1 2 3 {{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 }}
16. ^1 {{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 |journal = Icarus |volume = 261 |pages = 34–47 |bibcode = 2015Icar..261...34V |doi = 10.1016/j.icarus.2015.08.007 |arxiv = 1506.00762 }}
17. ^1 2 {{Cite journal |first1 = Joseph P. |last1 = Chatelain |first2 = Todd J. |last2 = Henry |first3 = Linda M. |last3 = French |first4 = Jennifer G. |last4 = Winters |first5 = David E. |last5 = Trilling |date = June 2016 |title = Photometric colors of the brightest members of the Jupiter L5 Trojan cloud |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016Icar..271..158C |journal = Icarus |volume = 271 |pages = 158–169 |bibcode = 2016Icar..271..158C |doi = 10.1016/j.icarus.2016.01.026 |access-date= 12 June 2018}}
18. ^1 2 3 {{Cite journal |display-authors = 6 |first1 = Robert D. |last1 = Stephens |first2 = Petr |last2 = Pravec |first3 = Hana |last3 = Kuèáková |first4 = P. |last4 = Kusnirak |first5 = Kamil |last5 = Hornoch |first6 = Vladimir |last6 = Benishek |first7 = Amadeo |last7 = Aznar Macias |first8 = Brian D. |last8 = Warner |date = October 2018 |title = 2207 Antenor: A Suspected Jovian Trojan Binary |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2018MPBu...45..341S |journal = The Minor Planet Bulletin |volume = 45 |issue = 4 |pages = 341–342 |issn = 1052-8091 |bibcode = 2018MPBu...45..341S |access-date= 8 November 2018}}
[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]

}}

External links

  • Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
  • Robert Stephens, Center for Solar System Studies (CS3)
  • Asteroid Lightcurve Database (LCDB), query form (info)
  • [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
  • Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
  • {{AstDys|2207}}
  • {{JPL small body}}
{{Use dmy dates|date=June 2018}}{{Minor planets navigator |2206 Gabrova |number=2207 |2208 Pushkin}}{{Small Solar System bodies}}{{DEFAULTSORT:Antenor}}

7 : Jupiter trojans (Trojan camp)|Discoveries by Nikolai Chernykh|Minor planets named from Greek mythology|Named minor planets|Binary asteroids|D-type asteroids (Tholen)|Astronomical objects discovered in 1977
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