| 词条 | (13366) 1998 US24 |
| 释义 |
| minorplanet = yes | name = {{mp|(13366) 1998 US|24}} | background = #C2FFFF | image = | image_size = | caption = | discovery_ref = [1] | discoverer = LONEOS | discovery_site = Anderson Mesa | discovered = 18 October 1998 | mpc_name = (13366) {{mp|1998 US|24}} | alt_names = {{mp|1998 US|24}}{{·}}{{mp|1996 RX|29}} | pronounced = | named_after = | mp_category = Jupiter trojan [1] {{nowrap|Greek [5]{{·}}background [6]}} | orbit_ref = | epoch = 23 March 2018 (JD 2458200.5) | uncertainty = 0 | observation_arc = 64.27 yr (23,476 d) | aphelion = 5.7685 AU | perihelion = 4.6895 AU | semimajor = 5.2290 AU | eccentricity = 0.1032 | period = 11.96 yr (4,367 d) | mean_anomaly = 193.23° | mean_motion = {{Deg2DMS|0.0824|sup=ms}} / day | inclination = 6.6365° | asc_node = 96.296° | arg_peri = 355.47° | jupiter_moid = 0.3771 AU | tisserand = 2.9760 | mean_diameter = {{val|33.30|2.87|ul=km}}[8] | rotation = {{val|400|105|ul=h}}[9] | albedo = {{val|0.058|0.016}}[8] | spectral_type = C {{small|(assumed)}}[11] | abs_magnitude = 11.10[8] 11.2[1][11] 11.3 }}{{mp|(13366) 1998 US|24}}, provisional designation {{mp|1998 US|24}}, is a Jupiter trojan from the Greek camp, approximately {{convert|33|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was discovered on 18 October 1998, by astronomers with the Lowell Observatory Near-Earth-Object Search at the Anderson Mesa Station near Flagstaff, Arizona, in the United States.[1] The dark Jovian asteroid is a slow rotator with a long rotation period of potentially 400 hours.[11] It has not been named since its numbering in January 2000.[18] Orbit and classification{{mp|1998 US|24}} is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the leading Greek camp at the Gas Giant's {{L4}} Lagrangian point, 60° ahead of its orbit {{cross reference|(see Trojans in astronomy)}}.[5] It is also a non-family asteroid in the Jovian background population.[6] It orbits the Sun at a distance of 4.7–5.8 AU once every 11 years and 12 months (4,367 days; semi-major axis of 5.23 AU). Its orbit has an eccentricity of 0.10 and an inclination of 7° with respect to the ecliptic. The body's observation arc begins with a precovery taken at Palomar Observatory in February 1954, more than 44 years prior to its official discovery observation at Anderson Mesa.[1]Numbering and namingThis minor planet was numbered by the MPC on 24 January 2000 ({{small|M.P.C. 37586}}).[18] As of 2018, it has not been named.[1] Physical characteristics{{mp|1998 US|24}} is an assumed C-type asteroid, while most larger Jupiter trojans are D-types.[11]Rotation periodIn August 2015, a first rotational lightcurve of {{mp|1998 US|24}} was obtained from photometric observations by the Kepler space telescope during its K2 mission. Lightcurve analysis gave a rotation period of {{val|400|105}} hours with a brightness variation of 0.23 magnitude ({{small|U=2-}}).[9] One month later, a second, lower-rated lightcurve by Kepler determined an alternative period of {{val|522|36}} hours with an amplitude of 0.20 ({{small|U=1+}}).[27] As of 2018, no secure period of this slow rotator has yet been obtained.[11] Diameter and albedoAccording to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, {{mp|1998 US|24}} measures 33.30 kilometers in diameter and its surface has an albedo of 0.058,[8] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 32.03 kilometers based on an absolute magnitude of 11.2.[11] {{Largest Jupiter trojans}}References1. ^1 2 3 4 5 6 7 {{cite web |title = 13366 (1998 US24) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=13366 |accessdate = 4 July 2018}} [1][2][3][4][5][6][7][8]2. ^1 2 {{cite web |title = List of Jupiter Trojans |work = Minor Planet Center |first3 = V. |last3 = Carruba |date = 1 July 2018 |url = https://www.minorplanetcenter.net/iau/lists/JupiterTrojans.html |accessdate = 4 July 2018}} 3. ^1 2 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 4 July 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 = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759...49G |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= 4 July 2018}} (online catalog) 5. ^1 2 {{cite web |title = Asteroid (13366) 1998 US24 – Proper Elements |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=13366&pc=1.1.6 |access-date= 4 July 2018}} 6. ^1 2 3 4 5 6 {{cite web |title = LCDB Data for (13366) |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=13366%7C |accessdate = 4 July 2018}} 7. ^1 {{Cite journal |first1 = Erin Lee |last1 = Ryan |first2 = Benjamin N. L. |last2 = Sharkey |first3 = Charles E. |last3 = Woodward |date = March 2017 |title = Trojan Asteroids in the Kepler Campaign 6 Field |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017AJ....153..116R |journal = The Astronomical Journal |volume = 153 |issue = 3 |page = 12 |bibcode = 2017AJ....153..116R |doi = 10.3847/1538-3881/153/3/116 |access-date= 4 July 2018}} 8. ^1 2 {{Cite journal |display-authors = 6 |first1 = Gy. M. |last1 = Szabó |first2 = A. |last2 = Pál |first3 = Cs. |last3 = Kiss |first4 = L. L. |last4 = Kiss |first5 = L. |last5 = Molnár |first6 = O. |last6 = Hanyecz |first7 = E. |last7 = Plachy |first8 = K. |last8 = Sárneczky |first9 = R. |last9 = Szabó |date = March 2017 |title = The heart of the swarm: K2 photometry and rotational characteristics of 56 Jovian Trojan asteroids |url = https://arxiv.org/pdf/1609.02760.pdf |journal = Astronomy and Astrophysics |volume = 599 |page = 13 |bibcode = 2017A&A...599A..44S |doi = 10.1051/0004-6361/201629401 |arxiv = 1609.02760 |access-date= 4 July 2018}} }} External links
4 : Jupiter trojans (Greek camp)|Discoveries by LONEOS|Slow rotating minor planets|Astronomical objects discovered in 1998 |
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