词条 | 1540 Kevola |
释义 |
| minorplanet = yes | name = 1540 Kevola | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = | discoverer = L. Oterma | discovery_site = Turku Obs. | discovered = 16 November 1938 | mpc_name = (1540) Kevola | alt_names = 1938 WK{{·}}1926 GT 1933 UM{{·}}1933 WR 1936 KL{{·}}1937 QG 1940 EJ | pronounced = | named_after = Kevola Observatory [2] | mp_category = main-belt{{·}}{{small|(outer)}} [3] background [4] | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 91.23 yr (33,320 days) | aphelion = 3.0937 AU | perihelion = 2.6068 AU | semimajor = 2.8502 AU | eccentricity = 0.0854 | period = 4.81 yr (1,758 days) | mean_anomaly = 37.259° | mean_motion = {{Deg2DMS|0.2048|sup=ms}} / day | inclination = 11.971° | asc_node = 52.468° | arg_peri = 113.68° | dimensions = {{val|37.12|13.60}} km[6] {{val|40.16|0.59}} km[7] {{val|40.22|13.69}} km[8] {{val|43.875|0.318}} km[9] {{val|44.18|1.7}} km[10] 44.22 km {{small|(derived)}}[3] | rotation = {{val|20.071|0.0119}} h[12] {{val|20.082|0.001}} h[13] | albedo = {{val|0.0433|0.004}}[10] 0.0474 {{small|(derived)}}[3] {{val|0.048|0.008}}[9] {{val|0.05|0.04}}[8] {{val|0.053|0.002}}[7] {{val|0.06|0.05}}[6] | spectral_type = C {{small|(assumed)}}[3] | abs_magnitude = {{val|10.640|0.003}} {{small|(R)}}[12]{{·}}10.70[3][8][9]{{·}}10.80[7][10]{{·}}10.83[6]{{·}}{{val|10.83|0.36}}[29] }}1540 Kevola, provisional designation {{mp|1938 WK}}, is a dark background asteroid from the outer regions of the asteroid belt, approximately 42 kilometers in diameter. It was discovered on 16 November 1938, by astronomer Liisi Oterma at the Iso-Heikkilä Observatory in Turku, Finland.[30] The asteroid was named after the Finnish Kevola Observatory.[2] Orbit and classificationKevola is a non-family asteroid of the main belt's background population.[4] It orbits the Sun in the outer asteroid belt at a distance of 2.6–3.1 AU once every 4 years and 10 months (1,758 days). Its orbit has an eccentricity of 0.09 and an inclination of 12° with respect to the ecliptic.The body's observation arc begins with its first identification as {{mp|1926 GT}} at Heidelberg Observatory in April 1926, more than 12 years prior to its official discovery observation at Turku.[30] Physical characteristicsKevola is an assumed carbonaceous C-type asteroid.[3]Rotation periodIn February 2007, a rotational lightcurve of Kevola was obtained from photometric observations by French amateur astronomer Pierre Antonini. Lightcurve analysis gave a rotation period of 20.082 hours with a brightness variation of 0.23 magnitude ({{small|U=3-}}).[13] Another lightcurve obtained by astronomers at the Palomar Transient Factory in October 2010, gave a concurring period of 20.071 hours with an amplitude of 0.33 magnitude ({{small|U=2}}).[12] Diameter and albedoAccording 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, Kevola measures between 37.12 and 44.18 kilometers in diameter and its surface has an albedo between 0.0433 and 0.06.[6][7][8][9][10] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0474 and a diameter of 44.22 kilometers based on an absolute magnitude of 10.7.[3] NamingThis minor planet was named for the Finnish Kevola Observatory {{small|(064)}}.[2] The official naming citation was published by the Minor Planet Center before November 1977 ({{small|M.P.C. 3930}}).[45] References1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (1540) Kevola |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 122 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_1541 |chapter = (1540) Kevola }} [1][2][3][4][5][6][7][8][9][10][11][12][13]2. ^1 2 {{cite web |title = 1540 Kevola (1938 WK) |work = Minor Planet Center |url = http://www.minorplanetcenter.net/db_search/show_object?object_id=1540 |accessdate = 8 October 2017}} 3. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = http://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 8 October 2017}} 4. ^1 2 {{cite web |title = Asteroids and comets rotation curves – (1540) Kevola |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page4cou.html#001540 |accessdate = 8 October 2017}} 5. ^1 2 {{cite web |title = Small Bodies Data Ferret |work = Nesvorny HCM Asteroid Families V3.0 |url = https://sbntools.psi.edu/ferret/PropertySearch/familyForm.action |accessdate = 8 October 2017}} 6. ^1 2 3 4 5 6 7 {{cite web |title = LCDB Data for (1540) Kevola |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=1540%7CKevola |accessdate = 8 October 2017}} 7. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = A. 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4 : Background asteroids|Discoveries by Liisi Oterma|Named minor planets|Astronomical objects discovered in 1938 |
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