| 词条 | 66 Maja |
| 释义 |
| minorplanet = yes | name = 66 Maja | background = #D6D6D6 | image = A737.M1234.shape(1).png | image_size = 265 | caption = Lightcurve-based 3D-model of Maja | discovery_ref = | discoverer = H. P. Tuttle | discovery_site = Harvard College Obs. | discovered = 9 April 1861 | mpc_name = (66) Maja | alt_names = 1947 FO{{·}}1974 KR {{mp|1992 OX|10}}{{·}}A902 UF A906 QD | pronounced = {{IPAc-en|ˈ|m|aɪ|.|ə}}{{·}}or{{·}}{{IPAc-en|ˈ|m|eɪ|.|ə}} {{respell|MY|ə}}{{·}}or{{·}}{{respell|MAY|ə}} | named_after = Maia {{small|(Greek mythology)}}[2] | mp_category = main-belt{{·}}{{small|(middle)}} [3] background [4] | orbit_ref = | epoch = 4 September 2017 (JD 2458000.5) | uncertainty = 0 | observation_arc = 156.54 yr (57,178 days) | aphelion = 3.1021 AU | perihelion = 2.1884 AU | semimajor = 2.6453 AU | eccentricity = 0.1727 | period = 4.30 yr (1,571 days) | mean_anomaly = 241.56° | mean_motion = {{Deg2DMS|0.2291|sup=ms}} / day | inclination = 3.0461° | asc_node = 7.5071° | arg_peri = 44.071° | mean_diameter = {{val|62.87|15.72}} km[6] {{val|62.901|19.42}} km[7] {{val|71.79|0.92}} km[8] {{val|71.82|5.3}} km[9] {{val|74.30|21.31}} km[10] {{val|82.28|2.11}} km[11] | rotation = {{val|9.733}} h[12][13] {{val|9.73509|0.00005}} h[14] {{val|9.73570|0.00005}} h[15] {{val|9.736|0.009}} h[16] {{val|9.74|0.05}} h[14] {{val|9.761|0.03}} h[18] | albedo = {{val|0.03|0.01}}[11] {{val|0.037|0.052}}[10] {{val|0.05|0.02}}[6] {{val|0.0618|0.010}}[9] {{val|0.062|0.002}}[8] {{val|0.0759|0.0615}}[7] | spectral_type = Tholen {{=}} C {{·}}C [3] SMASS {{=}} Ch B–V {{=}} 0.697 U–B {{=}} 0.360 V–R {{=}} {{val|0.374|0.010}}[30] | abs_magnitude = 9.18[7]{{·}}{{val|9.18|0.35}}[32]{{·}}9.36[3][6][8][9]{{·}}{{val|9.44|0.09}}[30]{{·}}9.48[11]{{·}}9.84[10] }}Maja ({{IPAc-en|ˈ|m|aɪ|.|ə}} {{respell|MY|ə}}; also: {{IPAc-en|ˈ|m|eɪ|.|ə}} {{respell|MAY|ə}}; minor planet designation: 66 Maja) is a carbonaceous background asteroid from the central regions of the asteroid belt, approximately 71 kilometers in diameter. It was discovered on 9 April 1861, by American astronomer Horace Tuttle at the Harvard College Observatory in Cambridge, Massachusetts, United States.[41] The asteroid was named after Maia from Greek mythology.[2] Orbit and classificationMaja is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the central asteroid belt at a distance of 2.2–3.1 AU once every 4 years and 4 months (1,571 days; semi-major axis of 2.65 AU). Its orbit has an eccentricity of 0.17 and an inclination of 3° with respect to the ecliptic. The body's observation arc begins at the Harvard Observatory, one night after its official discovery observation.[41]Physical characteristicsIn the Tholen classification, Maja is a carbonaceous C-type asteroid, while in the SMASS classification it is a "hydrated" carbonaceous subtype (Ch). Rotation period and spin axesSeveral rotational lightcurves of Maja have been obtained from photometric observations since 1988.[12][13][14][16][18] Analysis of the best-rated lightcurve by French amateur astronomers Maurice Audejean and Jérôme Caron from February 2011 gave a rotation period of 9.73509 hours with a brightness amplitude of 0.25 magnitude ({{small|U=3}}).[3][14] In 2016, a modeled lightcurve was derived from various photometric database sources, giving a concurring sidereal period of 9.73570 hours and two spin axes of (49.0°, −70.0°) and (225.0°, −68.0°) in ecliptic coordinates.[15] 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, Maja measures between 62.87 and 82.28 kilometers in diameter and its surface has an albedo between 0.03 and 0.0759.[6][7][8][9][10][11] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0618 and a diameter of 71.82 kilometers based on an absolute magnitude of 9.36.[3][9] NamingThis minor planet was named by Harvard's former president, J. Quincy, after Maia, one of the Seven Sisters of the Pleiades in Greek mythology. She is the mother of Hermes (Mercury) and the daughter of Atlas and Pleione. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 10}}).[2] Double namingThe asteroids {{MoMP|130|130 Elektra}}, {{MoMP|233|233 Asterope}} and {{MoMP|1051|1051 Merope}} were also named after the mythological Seven Sisters. In 1861, the director of the discovering observatory, George Phillips Bond, raised a minor concern since these names had already been applied to some of the brightest stars of the Pleiades in the constellation of Taurus: Maia, Electra, Asterope and Merope.[2] References1. ^1 2 3 4 {{cite book |title = Dictionary of Minor Planet Names – (66) Maja |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |pages = 21–22 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_67 |chapter = (66) Maja }} [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]2. ^1 2 {{cite web |title = 66 Maja |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=66 |accessdate = 11 January 2018}} 3. ^1 2 3 4 {{cite web |title = Asteroids and comets rotation curves – (66) Maja |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page1cou.html#000066 |accessdate = 11 January 2018}} 4. ^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 = 11 January 2018}} 5. ^1 2 3 4 5 {{cite web |title = LCDB Data for (66) Maja |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=66%7CMaja |accessdate = 11 January 2018}} 6. ^1 2 3 4 5 {{cite journal |first1 = E. 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7 : Background asteroids|Discoveries by Horace Tuttle|Minor planets named from Greek mythology|Named minor planets|C-type asteroids (Tholen)|Ch-type asteroids (SMASS)|Astronomical objects discovered in 1861 |
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