| 词条 | 480 Hansa |
| 释义 |
| minorplanet = yes | name = 480 Hansa | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = [1] | discoverer = M. F. Wolf L. Carnera | discovery_site = Heidelberg Obs. | discovered = 21 May 1901 | mpc_name = (480) Hansa | alt_names = 1901 GL{{·}}A905 JA A911 UJ | pronounced = | named_after = Hanseatic League [2] {{small|(medieval trade association)}} | mp_category = {{nowrap|main-belt [1]{{·}}{{small|(middle)}} [5]}} Hansa [6][7] | orbit_ref = | epoch = 23 March 2018 (JD 2458200.5) | uncertainty = 0 | observation_arc = 116.44 yr (42,528 d) | aphelion = 2.7656 AU | perihelion = 2.5213 AU | semimajor = 2.6435 AU | eccentricity = 0.0462 | period = 4.30 yr (1,570 d) | mean_anomaly = 222.78° | mean_motion = {{Deg2DMS|0.2293|sup=ms}} / day | inclination = 21.307° | asc_node = 237.18° | arg_peri = 214.53° | mean_diameter = {{val|55.94|0.58|ul=km}}[9] {{val|56.22|2.5|u=km}}[10] {{val|65.67|20.89|u=km}}[11] | rotation = {{val|11.758|ul=h}}[12] {{val|16.12|u=h}}[13] {{val|16.183|0.001|u=h}}[13] {{val|16.1894|0.0005|u=h}}[15] {{val|16.19|u=h}}[16][17] {{val|16.22|u=h}}[18] | albedo = {{val|0.162|0.264}}[11] {{val|0.2485|0.024}}[10] {{val|0.254|0.007}}[9] | spectral_type = Tholen {{=}} S [5] B–V {{=}} 0.854 U–B {{=}} 0.439 | abs_magnitude = 8.38[5][9][10] 8.51[11] }}Hansa (minor planet designation: 480 Hansa), provisional designation {{mp|1901 GL}}, is a stony asteroid and the namesake of the Hansa family located in the central region of the asteroid belt, approximately {{convert|56|km|mi|abbr=off|sp=us}} in diameter. It was discovered on 21 May 1901, by astronomers Max Wolf and Luigi Carnera at the Heidelberg Observatory in southwest Germany.[1] The S-type asteroid has a rotation period of 16.19 hours and possibly an elongated shape.[5] It was named after the Hanseatic League, a medieval European trade association.[2] Orbit and classificationHansa is the namesake and parent body of the stony Hansa family ({{small|803}}),[6] a high-inclination family with more than a thousand known members. Hansa and the asteroid 925 Alphonsina are the two largest member of this family.[7][36]{{rp|23}} It orbits the Sun in the central asteroid belt at a distance of 2.5–2.8 AU once every 4 years and 4 months (1,570 days; semi-major axis of 2.64 AU). Its orbit has an eccentricity of 0.05 and an inclination of 21° with respect to the ecliptic. The body's observation arc begins at Heidelberg, the night after its official discovery observation in May 1901.[1] Physical characteristicsIn the Tholen classification, Hansa is a common, stony S-type asteroid.[5] Rotation periodSeveral rotational lightcurves of Hansa were obtained from photometric observations since the 1990s ({{small|U=2/2-/2+/3}}).[12][13][18] Analysis of the two best-rated lightcurves gave a rotation period of 16.19 hours with a brightness amplitude of 0.58 and 0.44 magnitude, respectively ({{small|U=3/3}}).[16][17] A high brightness variation typically indicates an elongated shape. A modeled lightcurve using photometric data from large collaboration network was published in 2016. It gave a concurring period of 16.1894 hours, as well as two spin axes at (352.0°, −18.0°) and (173.0°, −32.0°) in ecliptic coordinates (λ, β).[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, Hansa measures between 55.94 and 65.67 kilometers in diameter and its surface has an albedo between 0.162 and 0.254.[9][10][11] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is an albedo of 0.2485 and a diameter of 56.22 kilometers based on an absolute magnitude of 8.38.[5] NamingThis minor planet was named after the Hanseatic League ({{lang-de|Hansa; Hanse|links=no}}), a medieval confederation of merchant guilds and market towns in Northern Europe and the Baltic region. On the height of its expansion during the 14th and 15th century, the league included cities that are now located in Germany, Poland, Sweden, Estonia, Latvia, the Netherlands and Russia. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 52}}). The name was proposed by astronomer Heinrich Kreutz in 1906, who was an editor of the journal Astronomische Nachrichten based in the German city of Kiel, which was a member town of the Hanse League.[2] References1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (480) Hansa |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 53 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_481 |chapter = (480) Hansa }} [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]2. ^1 2 3 4 {{cite web |title = 480 Hansa (1901 GL) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=480 |accessdate = 4 April 2018}} 3. ^1 2 3 {{cite web |title = Asteroids and comets rotation curves – (480) Hansa |last = Behrend |first = Raoul |publisher = Geneva Observatory |url = http://obswww.unige.ch/~behrend/page2cou.html#000480 |accessdate = 4 April 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 = 4 April 2018}} 5. ^1 {{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 2 {{Cite journal |first1 = C. W. |last1 = Hergenrother |first2 = S. M. |last2 = Larson |first3 = T. B. |last3 = Spahr |date = September 1996 |title = The Hansa Family: A New High-Inclination Asteroid Family |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1996DPS....28.1007H |journal = American Astronomical Society |volume = 28 |page = 1097 |bibcode = 1996DPS....28.1007H |access-date= 4 April 2018}} 7. ^1 2 3 4 5 6 {{cite web |title = LCDB Data for (480) Hansa |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=480%7CHansa |accessdate = 4 April 2018}} 8. ^1 2 3 4 {{cite journal |first1 = E. F. |last1 = Tedesco |first2 = P. V. |last2 = Noah |first3 = M. |last3 = Noah |first4 = S. 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6 : Hansa asteroids|Discoveries by Max Wolf|Discoveries by Luigi Carnera|Named minor planets|S-type asteroids (Tholen)|Astronomical objects discovered in 1901 |
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