请输入您要查询的百科知识：

　

词条 2456 Palamedes
释义

  1. Orbit and classification

  2. Naming

  3. Physical characteristics

      Rotation period    Diameter and albedo  

  4. References

  5. External links

{{Infobox planet
| minorplanet = yes
| name = 2456 Palamedes
| background = #C2FFFF
| image =
| image_size =
| caption =
| discovery_ref =  [1]
| discoverer = {{nowrap|Purple Mountain Obs.}}
| discovery_site = Purple Mountain Obs.
| discovered = 30 January 1966
| mpc_name = (2456) Palamedes
| alt_names = {{mp|1966 BA|1}}{{·}}1973 TJ
{{mp|1977 AK|1}}{{·}}1979 EF
| pronounced = {{IPAc-en|ˌ|p|æ|l|ə|ˈ|m|iː|d|iː|z}}
{{Respell|PAL|ə|MEE|deez}}
| named_after = Palamedes [2]
{{small|(Greek mythology)}}
| mp_category = Jupiter trojan [1][5]
Greek [6][7]
| orbit_ref =  
| epoch = 27 April 2019 (JD 2458600.5)
| uncertainty = 0
| observation_arc = 65.59 yr (23,955 d)
| aphelion = 5.5103 AU
| perihelion = 4.7498 AU
| semimajor = 5.1301 AU
| eccentricity = 0.0741
| period = 11.62 yr (4,244 d)
| mean_anomaly = {{val|260.35|ul=°}}
| mean_motion = {{Deg2DMS|0.0848|sup=ms}} / day
| inclination = 13.912°
| asc_node = 327.36°
| arg_peri = 94.744°
| jupiter_moid = 0.1197 AU
| tisserand = 2.9370
| mean_diameter = {{val|65.92|0.51|ul=km}}[9]
{{val|91.66|3.1|u=km}}[10]
{{val|99.60|4.11|u=km}}[11]
| rotation = {{val|7.24|0.01|ul=h}}[12]
| albedo = {{val|0.026|0.002}}[11]
{{val|0.0304|0.002}}[10]
{{val|0.071|0.010}}[9]
| spectral_type = C {{small|(assumed)}}[5]
V–I {{=}} {{val|0.920|0.024}}[5]
| abs_magnitude = 9.3[1][5]
9.4[9]
9.60[11]
}}2456 Palamedes ({{IPAc-en|ˌ|p|æ|l|ə|ˈ|m|iː|d|iː|z}} {{Respell|PAL|ə|MEE|deez}}), provisional designation {{mp|1966 BA|1}}, is a large Jupiter trojan from the Greek camp, approximately {{convert|90|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 30 January 1966, by astronomers at the Purple Mountain Observatory in Nanking, China.[1] The assumed C-type asteroid has a rotation period of 7.24 hours and belongs to the 50 largest Jupiter trojans.[5] It was named after Palamedes from Greek mythology.[2]

Orbit and classification

Palamedes 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).[6] It is also a non-family asteroid in the Jovian background population.[7][28]

It orbits the Sun at a distance of 4.7–5.5 AU once every 11 years and 7 months (4,244 days; semi-major axis of 5.13 AU). Its orbit has an eccentricity of 0.07 and an inclination of 14° with respect to the ecliptic. The body's observation arc begins with a precovery taken at Palomar Observatory in February 1953, nearly 13 years prior to its official discovery observation at Nanking.[1]

Naming

This minor planet was named from Greek mythology after Palamedes, the most intelligent of all the Greek commanders of the Trojan War.[2] The official naming citation was published by the Minor Planet Center on 28 January 1983 ({{small|M.P.C. 7618}}).[32]

Physical characteristics

Palamedes is an assumed carbonaceous C-type asteroid.[5] Its has an average V–I color index of {{val|0.920|0.024}}, typically associated with D-type asteroid (also see table below).[5]

Rotation period

In August 1995, a rotational lightcurve of Palamedes was obtained from photometric observations by Stefano Mottola and Hans-Josef Schober using the now decommissioned Bochum 0.61-metre Telescope at ESO's La Silla Observatory in Chile. Lightcurve analysis gave a rotation period of {{val|7.258|0.004}} hours and a brightness variation of 0.05 magnitude ({{small|U=2-}}).[5][36]

A more refined period of {{val|7.24|0.01}} hours with an amplitude of 0.27 magnitude was obtained by Robert Stephens at the Goat Mountain Astronomical Research Station {{Obscode|G79}} in October 2009 ({{small|U=3}}).[5][12]

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, Palamedes measures between 65.92 and 99.60 kilometers in diameter and its surface has an albedo between 0.026 and 0.071.[9][10][11] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0399 and a diameter of 91.83 kilometers based on an absolute magnitude of 9.3.[5]

{{Largest Jupiter trojans}}

References

1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (2456) Palamedes |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |chapter = (2456) Palamedes |page = 200 |date = 2007 |isbn = 978-3-540-29925-7 |doi = 10.1007/978-3-540-29925-7_2457}}
2. ^1 2 3 4 5 {{cite web |title = 2456 Palamedes (1966 BA1) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2456 |accessdate = 12 February 2019}}
3. ^1 2 {{cite web |title = List of Jupiter Trojans |work = Minor Planet Center |date = 28 October 2018 |url = https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html |accessdate = 12 February 2019}}
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 = 12 February 2019}}
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 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}}
7. ^1 2 {{cite web |title = Asteroid (2456) Palamedes – Proper elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=2456&pc=1.1.6 |accessdate = 6 June 2018}}
8. ^1 {{cite web |title = Asteroid 2456 Palamedes |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=2456+Palamedes |accessdate = 6 June 2018}}
9. ^1 2 3 4 5 6 7 8 9 10 {{cite web |title = LCDB Data for (2456) Palamedes |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=2456%7CPalamedes |accessdate = 12 February 2019}}
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 |author = Stephens, Robert D. |date = April 2010 |title = Trojan Asteroids Observed from GMARS and Santana Observatories: 2009 October - December |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37...47S |journal = The Minor Planet Bulletin |volume = 37 |issue = 2 |pages = 47–48 |issn = 1052-8091 |bibcode = 2010MPBu...37...47S |access-date= 6 June 2018}}
12. ^1 {{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 }}
[1][2][3][4][5][6][7][8][9][10][11][12]

}}

External links

  • 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|2456}}
  • {{JPL small body}}
{{Use dmy dates|date=February 2019}}{{Minor planets navigator |2455 Somville |number=2456 |2457 Rublyov}}{{Small Solar System bodies}}{{DEFAULTSORT:Palamedes}}

5 : Jupiter trojans (Greek camp)|Discoveries by the Purple Mountain Observatory|Minor planets named from Greek mythology|Named minor planets|Astronomical objects discovered in 1966
随便看

　

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。

　

Copyright © 2023 OENC.NET All Rights Reserved
京ICP备2021023879号 更新时间：2024/11/14 0:12:52