| 词条 | 2056 Nancy |
| 释义 |
| minorplanet = yes | name = 2056 Nancy | background = #D6D6D6 | image = | image_size = | caption = | discovery_ref = [1] | discovered = 15 October 1909 | discoverer = J. Helffrich | discovery_site = Heidelberg Obs. | mpc_name = (2056) Nancy | alt_names = A909 TB{{·}}1929 VQ {{mp|1942 RA|1}}{{·}}1962 XE {{mp|1972 VC|1}}{{·}}{{mp|1974 HL|2}} | pronounced = | named_after = {{nowrap|Nancy Lou Zissell Marsden}} {{small|(wife of Brian G. Marsden)}}[2] | mp_category = main-belt [1]{{·}}{{small|(inner)}} [5] background [6] | orbit_ref = | epoch = 23 March 2018 (JD 2458200.5) | uncertainty = 0 | observation_arc = 108.60 yr (39,665 d) | aphelion = 2.5253 AU | perihelion = 1.9098 AU | semimajor = 2.2175 AU | eccentricity = 0.1388 | period = 3.30 yr (1,206 d) | mean_anomaly = 303.73° | mean_motion = {{Deg2DMS|0.2985|sup=ms}} / day | inclination = 3.9361° | asc_node = 225.77° | arg_peri = 145.80° | mean_diameter = {{val|7.783|0.150|ul=km}}[8] {{val|8.227|0.085|u=km}}[9] 10.30 km {{small|(calculated)}}[5] {{val|11.19|2.42|u=km}}[11] | rotation = {{val|15.0|ul=h}}{{efn|name=CALL-2011}} | albedo = {{val|0.16|0.08}}[11] 0.20 {{small|(assumed)}}[5] {{val|0.3164|0.0387}}[9] {{val|0.351|0.056}}[8] | spectral_type = SMASS {{=}} S [5] | abs_magnitude = 12.3[1][5][9] 12.62[11] }}2056 Nancy, provisional designation {{mp|A909 TB}}, is a stony background asteroid from the inner regions of the asteroid belt, approximately {{convert|10|km|mi|abbr=off|sp=us|sigfig=1}} in diameter. It was discovered on 15 October 1909, by German astronomer Joseph Helffrich at Heidelberg Observatory in southwest Germany.[1] The S-type asteroid has a tentative rotation period of 15.0 hours.[5] It was named for Nancy Marsden, wife of British astronomer Brian G. Marsden.[2] Orbit and classificationNancy is a non-family asteroid of the main belt's background population. It orbits the Sun in the inner asteroid belt at a distance of 1.9–2.5 AU once every 3 years and 4 months (1,206 days; semi-major axis of 2.22 AU). Its orbit has an eccentricity of 0.14 and an inclination of 4° with respect to the ecliptic. The asteroid's observation arc begins with its official discovery observation at Heidelberg in October 1909.[1]NamingThis minor planet was named after Nancy Lou Zissell Marsden, wife of British astronomer Brian G. Marsden, who established the asteroid's identification, and after whom another minor planet, 1877 Marsden, was previously named.[2] The approved naming citation was published by the Minor Planet Center before November 1977 ({{small|M.P.C. 4359}}).[29] Physical characteristicsNancy is a common S-type asteroid in the SMASS classification.LightcurvesAs of 2018, only a single fragmentary lightcurve of Nancy has been obtained from photometric observation. Analysis of the rotational lightcurve gives a period of 15 hours with a brightness variation of 0.08 magnitude ({{small|U=1}}).[5]{{efn|name=CALL-2011}} Diameter and albedoAccording to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Nancy measures between 7.783 and 11.19 kilometers in diameter and its surface has an albedo between 0.16 and 0.351.[8][9][11] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 10.30 kilometers based on an absolute magnitude of 12.3.[5] Notes{{notelist|refs={{efn|name=CALL-2011|1=Anonymous lightcurve: rotation period {{val|15.0}} hours with a brightness amplitude of {{val|0.08}} mag. Summary figures for (2056) Nancy at Collaborative Asteroid Lightcurve Link (CALL).}}}} References1. ^1 2 3 {{cite book |title = Dictionary of Minor Planet Names – (2056) Nancy |last = Schmadel | first = Lutz D. |publisher = Springer Berlin Heidelberg |page = 166 |date = 2007 |isbn = 978-3-540-00238-3 |doi = 10.1007/978-3-540-29925-7_2057 |chapter = (2056) Nancy }} [1][2][3][4][5][6][7][8]2. ^1 2 3 4 5 {{cite web |title = 2056 Nancy (A909 TB) |work = Minor Planet Center |url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2056 |accessdate = 8 September 2018}} 3. ^1 {{cite web |title = MPC/MPO/MPS Archive |work = Minor Planet Center |url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |accessdate = 3 July 2017}} 4. ^1 2 3 {{cite journal |display-authors = 6 |first1 = Joseph R. |last1 = Masiero |first2 = T. |last2 = Grav |first3 = A. K. |last3 = Mainzer |first4 = C. R. |last4 = Nugent |first5 = J. M. |last5 = Bauer |first6 = R. |last6 = Stevenson |first7 = S. |last7 = Sonnett |date = August 2014 |title = Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos |journal = The Astrophysical Journal |volume = 791 |issue = 2 |page = 11 |bibcode = 2014ApJ...791..121M |doi = 10.1088/0004-637X/791/2/121 |arxiv = 1406.6645 }} 5. ^1 {{cite web |title = Asteroid 2056 Nancy |work = Small Bodies Data Ferret |url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=2056+Nancy |accessdate = 8 September 2018}} 6. ^1 2 3 4 5 6 7 8 {{cite web |title = LCDB Data for (2056) Nancy |publisher = Asteroid Lightcurve Database (LCDB) |url = http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=2056%7CNancy |accessdate = 3 July 2017}} 7. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = A. |last1 = Mainzer |first2 = T. |last2 = Grav |first3 = J. |last3 = Masiero |first4 = E. |last4 = Hand |first5 = J. |last5 = Bauer |first6 = D. |last6 = Tholen |first7 = R. S. |last7 = McMillan |first8 = T. |last8 = Spahr |first9 = R. M. |last9 = Cutri |first10 = E. |last10 = Wright |first11 = J. |last11 = Watkins |first12 = W. |last12 = Mo |first13 = C. |last13 = Maleszewski |date = November 2011 |title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results |journal = The Astrophysical Journal |volume = 741 |issue = 2 |page = 25 |bibcode = 2011ApJ...741...90M |doi = 10.1088/0004-637X/741/2/90 |arxiv = 1109.6407 }} 8. ^1 2 3 4 {{cite journal |display-authors = 6 |first1 = C. R. |last1 = Nugent |first2 = A. |last2 = Mainzer |first3 = J. |last3 = Bauer |first4 = R. M. |last4 = Cutri |first5 = E. A. |last5 = Kramer |first6 = T. |last6 = Grav |first7 = J. |last7 = Masiero |first8 = S. |last8 = Sonnett |first9 = E. L. |last9 = Wright |date = September 2016 |title = NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos |url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016AJ....152...63N |journal = The Astronomical Journal |volume = 152 |issue = 3 |page = 12 |bibcode = 2016AJ....152...63N |doi = 10.3847/0004-6256/152/3/63 |arxiv = 1606.08923 |access-date= 3 July 2017}} }} External links
6 : Background asteroids|Discoveries by Joseph Helffrich|Minor planets named for people|Named minor planets|S-type asteroids (SMASS)|Astronomical objects discovered in 1909 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。