| 词条 | 21509 Lucascavin |
| 释义 |
| minorplanet = yes | name = 21509 Lucascavin | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = [1] | discoverer = LINEAR | discovery_site = Lincoln Lab's ETS | discovered = 22 May 1998 | mpc_name = (21509) Lucascavin | alt_names = {{mp|1998 KL|35}}{{·}}{{mp|1982 VD|3}} | pronounced = | named_after = Lucas James Cavin [1] {{small|(2005 ISEF awardee)}} | mp_category = main-belt [1]{{·}}({{small|inner}}) Lucascavin [5]{{·}}Flora [5][7] {{nowrap|Baptistina [5]{{·}}Duponta [9]}} | orbit_ref = | epoch = 27 April 2019 (JD 2458600.5) | uncertainty = 0 | observation_arc = 35.44 yr (12,944 d) | aphelion = 2.5369 AU | perihelion = 2.0276 AU | semimajor = 2.2822 AU | eccentricity = 0.1116 | period = 3.45 yr (1,259 d) | mean_anomaly = 189.97° | mean_motion = {{Deg2DMS|0.2859|sup=ms}} / day | inclination = 5.9813° | asc_node = 70.168° | arg_peri = 4.4723° | mean_diameter = {{val|2.54|ul=km}} {{small|(calculated)}}[7] | rotation = {{val|5.784|0.004|ul=h}}[12] | albedo = {{val|0.24}} {{small|(assumed)}}[7] | spectral_type = S {{small|(assumed)}}[7] V–R {{=}} {{val|0.474|0.016}}[12] | abs_magnitude = {{val|14.68|0.07}} {{small|(R)}}[12] 14.9[1] }}21509 Lucascavin, provisional designation {{mp|1998 KL|35}}, is a small asteroid from the inner regions of the asteroid belt, approximately {{convert|2.5|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It is the namesake of the tiny Lucascavin family located within the Flora clan. It was discovered on 22 May 1998, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico.[1] The presumed S-type asteroid has a rotation period of 5.8 hours.[7] It was named for the 2005-ISEF awardee Lucas James Cavin.[1] Orbit and classificationAccording to a HCM-analysis by David Nesvorný, Lucascavin is the namesake of the Lucascavin family ({{small|412}}),[5] a tight, young cluster between 200 and 800 thousand years old,[12][24] which consists of 3 known asteroids only – the others are {{LoMP|180255|(180255)}} and {{LoMP|209570|(209570)}}. The cluster in turn belongs to the encompassing Baptistina family ({{small|403}}) within the larger Florian region ({{small|402}}).[5][26] Since other astronomers have ruled out the existence of a Flora family in the first place, Lucascavin has also been grouped to the alternative Duponta family, a core group inside the Florian region.[9] Lucascavin orbits the Sun in the inner asteroid belt at a distance of 2.0–2.5 AU once every 3 years and 5 months (1,259 days; semi-major axis of 2.28 AU). Its orbit has an eccentricity of 0.11 and an inclination of 6° with respect to the ecliptic. The body's observation arc begins with its first observation as {{mp|1982 VD|3}} at Kiso Observatory in November 1982, more than 15 years prior to its official discovery observation.[1]NamingThis minor planet was named after Lucas James Cavin (born 1986) who won the second place in the 2005 Intel International Science and Engineering Fair for his engineering project.[1] The official {{MoMP|21509|naming citation}} was published by the Minor Planet Center on 22 August 2005 ({{small|M.P.C. 54702}}).[31] At the time he attended the Chillico High School in Missouri, United States.[1] Physical characteristicsLucascavin is an assumed S-type asteroid,[7] in agreement with the overall spectral type of the Lucascavin, Baptistina and Flora family groupings.[5][26]{{rp|23}} Rotation periodBetween 2006 and 2016, several rotational lightcurves of Lucascavin have been obtained from photometric observations by Czech astronomer Petr Pravec. Best-rated lightcurve analysis from 2013 gave a rotation period of {{val|5.784|0.004}} hours with a consolidated brightness amplitude between 0.23 and 0.30 magnitude ({{small|U=2/3/3-}}).[7][12] Pravec also determined a low V–R color index of 0.474.[12] Diameter and albedoThe Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora the namesake of the Flora clan – and calculates a diameter of 2.54 kilometers based on an absolute magnitude of 15.14.[7] References1. ^1 2 3 4 5 6 7 8 9 {{cite web |title = 21509 Lucascavin (1998 KL35) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=21509 |accessdate = 5 December 2018}} [1][2][3][4][5][6][7][8]2. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 5 December 2018}} 3. ^1 2 {{cite web |title = Asteroid (21509) Lucascavin |publisher = AstDyS-2, Asteroids – Dynamic Site |url = http://hamilton.dm.unipi.it/astdys/index.php?n=15350&pc=1.1.6 |accessdate = 4 December 2018}} 4. ^1 2 3 4 5 6 {{cite web |title = Asteroid 21509 Lucascavin |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=21509+Lucascavin |accessdate = 5 December 2018}} 5. ^1 2 {{Cite book |first1 = D. |last1 = Nesvorný |first2 = M. |last2 = Broz |first3 = V. |last3 = Carruba |date = December 2014 |title = Identification and Dynamical Properties of Asteroid Families |journal = Asteroids IV |pages = 297–321 |bibcode = 2015aste.book..297N |doi = 10.2458/azu_uapress_9780816532131-ch016 |arxiv = 1502.01628 |isbn = 9780816532131 }} 6. ^1 {{Cite journal |first1 = D. |last1 = Nesvorný |first2 = D. |last2 = Vokrouhlický |date = November 2006 |title = New Candidates for Recent Asteroid Breakups |journal = The Astronomical Journal |volume = 132 |issue = 5 |pages = 1950–1958 |bibcode = 2006AJ....132.1950N |doi = 10.1086/507989 }} 7. ^1 2 3 4 5 6 7 8 {{cite web |title = LCDB Data for (21509) Lucascavin |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=21509%7CLucascavin |accessdate = 5 December 2018}} 8. ^1 2 3 4 5 6 {{Cite journal |display-authors = 6 |first1 = P. |last1 = Pravec |first2 = P. |last2 = Fatka |first3 = D. |last3 = Vokrouhlický |first4 = D. J. |last4 = Scheeres |first5 = P. |last5 = Kusnirák |first6 = K. |last6 = Hornoch |first7 = A. |last7 = Galád |first8 = J. |last8 = Vrastil |first9 = D. P. |last9 = Pray |first10 = Yu. N. |last10 = Krugly |first11 = N. M. |last11 = Gaftonyuk |first12 = R. Ya. |last12 = Inasaridze |first13 = V. R. |last13 = Ayvazian |first14 = O. I. |last14 = Kvaratskhelia |first15 = V. T. |last15 = Zhuzhunadze |first16 = M. |last16 = Husárik |first17 = W. R. |last17 = Cooney |first18 = J. |last18 = Gross |first19 = D. |last19 = Terrell |first20 = J. |last20 = Világi |first21 = L. |last21 = Kornos |first22 = S. |last22 = Gajdos |first23 = O. |last23 = Burkhonov |first24 = Sh. A. |last24 = Ehgamberdiev |first25 = Z. |last25 = Donchev |first26 = G. |last26 = Borisov |first27 = T. |last27 = Bonev |first28 = V. V. |last28 = Rumyantsev |first29 = I. E. |last29 = Molotov |date = April 2018 |title = Asteroid clusters similar to asteroid pairs |url = https://www.asu.cas.cz/~binaries/contents/abstracts/pdf/abstracts_0002.pdf |journal = Icarus |volume = 304 |pages = 110–126 |bibcode = 2018Icar..304..110P |doi = 10.1016/j.icarus.2017.08.008 |access-date= 5 December 2018}} }} External links
6 : Lucascavin asteroids|Baptistina asteroids|Discoveries by LINEAR|Minor planets named for people|Named minor planets|Astronomical objects discovered in 1998 |
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