| 词条 | 4836 Medon |
| 释义 |
| minorplanet = yes | name = 4836 Medon | background = #C2FFFF | image = | image_size = | caption = | discovery_ref = [1] | discoverer = C. Shoemaker | discovery_site = Palomar Obs. | discovered = 2 February 1989 | mpc_name = (4836) Medon | alt_names = {{mp|1989 CK|1}}{{·}}1986 XM | pronounced = {{IPAc-en|ˈ|m|iː|d|ən}}{{·}}{{Respell|MEE|dən}} | named_after = Medon {{small|(Greek mythology)}}[1] | mp_category = Jupiter trojan [1][5] {{nowrap|Greek [6][7]{{·}}background [7]}} | orbit_ref = | epoch = 23 March 2018 (JD 2458200.5) | uncertainty = 0 | observation_arc = 30.91 yr (11,289 d) | aphelion = 5.7686 AU | perihelion = 4.6436 AU | semimajor = 5.2061 AU | eccentricity = 0.1080 | period = 11.88 yr (4,339 d) | mean_anomaly = 185.15° | mean_motion = {{Deg2DMS|0.0830|sup=ms}} / day | inclination = 19.400° | asc_node = 82.050° | arg_peri = 34.752° | jupiter_moid = 0.322 AU | tisserand = 2.8750 | mean_diameter = {{val|63.28|0.77|u=km}}[10] {{val|67.73|4.7|u=km)}}[11] {{val|78.70|3.18|u=km}}[12] | rotation = {{val|9.818|0.005|ul=h}}[13]{{efn|name=lightcurve-plot-2014}} {{val|9.838|0.013|u=h}}[14] {{val|9.840|0.013|u=h}}[14] | albedo = {{val|0.045|0.004}}[12] {{val|0.0610|0.009}}[11] {{val|0.070|0.006}}[10] | spectral_type = C {{small|(assumed)}}[5] V–I {{=}} {{val|0.920|0.039}} | abs_magnitude = {{val|9.35|0.43}}[21] 9.50[1][11][10][12] }}4836 Medon ({{IPAc-en|ˈ|m|iː|d|ən}} {{Respell|MEE|dən}}), provisional designation {{mp|1989 CK|1}}, is a large Jupiter trojan from the Greek camp, approximately {{convert|68|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 2 February 1989, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California.[1] The dark asteroid has a rotation period of 9.82 hours and belongs to the 60 largest Jupiter trojans.[5] It was named after the mythological Greek warrior Medon.[1] Orbit and classificationMedon is a 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 a non-family asteroid in the Jovian background population.[7][31]It orbits the Sun at a distance of 4.6–5.8 AU once every 11 years and 11 months (4,339 days; semi-major axis of 5.21 AU). Its orbit has an eccentricity of 0.11 and an inclination of 19° with respect to the ecliptic. The body's observation arc begins with its first observation as {{mp|1986 XM}} at Anderson Mesa Station in December 1986, or 26 months prior to its official discovery observation at Palomar.[1] NamingThis minor planet was named by the discoverer after Medon (Phylace's Medon), the illegitimate son of Oileus and half-brother of Ajax the Lesser. Medon was exiled for having killed a relative of his stepmother Eriopis. In the Trojan War, he was killed by Aeneas before the Greek ships.[1] The official naming citation was published by the Minor Planet Center on 25 August 1991 ({{small|M.P.C. 18648}}).[35] Physical characteristicsMedon is a generically assumed C-type asteroid.[5] Many if not most Jupiter trojans possess an even darker D or P-type spectrum. Rotation periodIn May 1991, observations by Stefano Mottola using the now decommissioned ESO 1-metre telescope at ESO's La Silla Observatory in Chile gave a rotation period of 9.838 hours at an amplitude of 0.24 magnitude ({{small|U=2+}}). Follow-up observations were made in 1992 and 2009 – in order to rule out any alternative period solutions, as the irregular lightcurve showed additional maxima and minima – gave a concurring period of 9.840 hours with a brightness variation of 0.31 magnitude ({{small|U=2+}}).[14] In April 2014, another rotational lightcurve was obtained by Robert Stephens and Daniel Coley at the Center for Solar System Studies in California in collaboration with Linda French from Illinois Wesleyan University. Lightcurve analysis gave a well-defined rotation period of 9.818 hours with an amplitude of 0.27 magnitude ({{small|U=3}}).[13]{{efn|name=lightcurve-plot-2014}} Diameter and albedoAccording 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, Medon measures between 63.28 and 78.70 kilometers in diameter and its surface has an albedo between 0.045 and 0.070.[10][11][12] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.061 and a diameter of 67.73 kilometers based on an absolute magnitude of 9.5.[5] {{Largest Jupiter trojans}}Notes{{notelist|refs={{efn|name=lightcurve-plot-2014|1=Lightcurve plot of (4836) Medon from 2014 by Robert Stephens and Daniel Coley at the Center for Solar System Studies {{Obscode|U81}}. Rotation period {{val|9.818|0.005}} hours and an amplitude of {{val|0.27|0.02}} mag. Quality code is 3. Summary figures at the LCDB.}}}} References1. ^1 2 3 4 5 6 7 8 {{cite web |title = 4836 Medon (1989 CK1) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=4836 |accessdate = 31 May 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 = 2 February 2018 |url = https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html |accessdate = 31 May 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 = 31 May 2018}} 4. ^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}} 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 {{cite web |title = Asteroid 4836 Medon |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=4836+Medon |accessdate = 31 May 2018}} 7. ^1 2 3 {{cite web |title = Asteroid (4836) Medon – Proper Elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=4836&pc=1.1.6 |accessdate = 31 May 2018}} 8. ^1 2 3 4 5 {{cite web |title = LCDB Data for (4836) Medon |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=4836%7CMedon |accessdate = 31 May 2018}} 9. ^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]) 10. ^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 }} 11. ^1 2 {{Cite journal |first1 = Robert D. |last1 = Stephens |first2 = Daniel, R. |last2 = Coley |first3 = Linda M. |last3 = French |date = January 2016 |title = Large L5 Jovian Trojan Asteroid Lightcurves from the Center for Solar System Studies |journal = The Minor Planet Bulletin |volume = 43 |issue = 1 |pages = 15–22 |issn = 1052-8091 |bibcode = 2016MPBu...43...15S }} 12. ^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 }} }} External links
6 : Jupiter trojans (Greek camp)|Background asteroids|Discoveries by Carolyn S. Shoemaker|Minor planets named from Greek mythology|Named minor planets|Astronomical objects discovered in 1989 |
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