1125 China

Main-belt asteroid 1928 UF or 1986 QK 1, the asteroid discovered in 1928, lost, and then recovered in 1986 3789 Zhongguo October 2019 yes 1125 China #D6D6D6 001125-asteroid shape model (1125) China.png Modelled shape of China from its lightcurve Y. C. Chang Purple Mountain Obs. 30 October 1957 (1125) China 1957 UN 11959 EL1971 KX1974 VMA909 BE China (country) main-belt(outer) background 4 September 2017 (JD 2458000.5) 0 108.75 yr (39,722 days) 3.8083 AU 2.4452 AU 3.1267 AU 0.2180 5.53 yr (2,019 days) 215.01° 0.1783 ms / day 3.0407° 97.172° 10.745° 21.86 6.06 km23.95 6.03 km26.084 0.199 km26.513 0.354 km26.64 km (calculated)30.49 1.97 km 5.367 0.002 h5.45 0.02 hlightcurve-plot-Stephens (132.0°, −46.0°) (λ1/β1) (305.0°, −49.0°) (λ2/β2) 0.057 (assumed)0.057 0.0040.06 0.030.063 0.0090.08 0.060.0860 0.0223 C (assumed) 11.2011.26 0.1911.6011.70 1125 China (prov. designation: 1957 UN 1) is a dark background asteroid from the outer regions of the asteroid belt. It was discovered on 30 October 1957, by astronomer Zhāng Yùzhé (Y. C. Chang, 张钰哲) at the Chinese Purple Mountain Observatory (紫金山天文台) in Nanjing, and named in honor of the country China. The assumed C-type asteroid has a short rotation period of 5.4 hours and measures approximately 26 km mi off us in diameter. The name and number 1125 China were actually reassigned from another asteroid that had been lost. That asteroid was eventually recovered and given the new designation 3789 Zhongguo, which means "China" in Mandarin. "1125 China" is thus the only permanent designation and name of an asteroid that is ambiguous. Orbit and classification China is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It orbits the Sun in the outer asteroid belt at a distance of 2.4–3.8 AU once every 5 years and 6 months (2,019 days; semi-major axis of 3.13 AU). Its orbit has an eccentricity of 0.22 and an inclination of 3° with respect to the ecliptic. The asteroid was first observed as A909 BE at Heidelberg Observatory in January 1909, where the body's observation arc begins three week later in February 1909, or more than 48 years prior to its official discovery observation at Nanking, China. Naming This minor planet was named after People's Republic of China where the asteroid was discovered. The official naming citation was published by the Minor Planet Center on 31 May 1988 (M.P.C. 13179). Accidentally usurped designation 3789 Zhongguo While studying in Chicago in 1928, Zhang Yuzhe discovered an asteroid that was given the provisional designation 1928 UF, and later the number 1125. He named it "China" or "中華" (Zhōnghuá). However, this asteroid was not observed beyond its initial appearance and a precise orbit could not be calculated. In 1957, the Purple Mountain Observatory in China discovered a new asteroid, and with Zhang Yuzhe's agreement the new object 1957 UN 1 was reassigned the official designation 1125 China in place of the lost 1928 UF. However, in 1986, the newly discovered object 1986 QK 1 was confirmed to be a rediscovery of the original 1928 UF, and this object was named 3789 Zhongguo. Zhongguo is the Chinese word for China. Physical characteristics China is an assumed carbonaceous C-type asteroid. Rotation period and poles In February 2009, a rotational lightcurve of China was obtained from photometric observations by Kenneth T. Menzies at the Tigh Speuran Observatory I14 in Massachusetts, United States. Lightcurve analysis gave a well-defined rotation period of 5.367 hours with a brightness variation of 0.38 magnitude (U=3). In October 2013, Robert Stephens measured a similar period of 5.45 hours and an amplitude of 0.62 magnitude at the Center for Solar System Studies U81 in California (U=3-).lightcurve-plot-Stephens Published in 2016, an additional lightcurve was modeled from photometric data obtained by a large international collaboration of astronomers. Modelling gave a concurring sidereal rotation period of 5.36863 0.00005 hours, as well as two spin axes of (132.0°, −46.0°) and (305.0°, −49.0°) in ecliptic coordinates. Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, China measures between 21.86 and 30.49 kilometers in diameter and its surface has an albedo between 0.057 and 0.0860. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 26.64 kilometers based on an absolute magnitude of 11.6. Notes lightcurve-plot-Stephens Stephens (2013): lightcurve plot of (1125) China, rotation period 5.45 0.02 hours. Summary figures at the LCDB References 30em 2017-10-29 last obs. JPL Small-Body Database Browser: 1125 China (1957 UN1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001125 Jet Propulsion Laboratory 23 January 2018 Dictionary of Minor Planet Names – (1125) China Schmadel Lutz D. (1125) China Springer Berlin Heidelberg 95 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1126 Dictionary of Minor Planet Names – (3789) Zhongguo Schmadel Lutz D. (3789) Zhongguo Springer Berlin Heidelberg 320 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_3783 1125 China (1957 UN1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1125 23 January 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 23 January 2018 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri J. Dailey P. R. M. Eisenhardt R. S. McMillan T. B. Spahr M. F. Skrutskie D. Tholen R. G. Walker E. L. Wright E. DeBaun D. Elsbury T. IV Gautier S. Gomillion A. Wilkins November 2011 Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters The Astrophysical Journal 741 2 20 2011ApJ...741...68M 10.1088/0004-637X/741/2/68 1109.4096 118745497 1125 23 January 2018 6 Fumihiko Usui Daisuke Kuroda Thomas G. Müller Sunao Hasegawa Masateru Ishiguro Takafumi Ootsubo Daisuke Ishihara Hirokazu Kataza Satoshi Takita Shinki Oyabu Munetaka Ueno Hideo Matsuhara Takashi Onaka October 2011 Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey Publications of the Astronomical Society of Japan 63 5 1117–1138 2011PASJ...63.1117U 10.1093/pasj/63.5.1117 free (online, AcuA catalog p. 153) 6 A. Mainzer T. Grav J. Masiero E. Hand J. Bauer D. Tholen R. S. McMillan T. Spahr R. M. Cutri E. Wright J. Watkins W. Mo C. Maleszewski November 2011 NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results The Astrophysical Journal 741 2 25 2011ApJ...741...90M 10.1088/0004-637X/741/2/90 1109.6407 35447010 6 C. R. Nugent A. Mainzer J. Bauer R. M. Cutri E. A. Kramer T. Grav J. Masiero S. Sonnett E. L. Wright September 2016 NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos The Astronomical Journal 152 3 12 2016AJ....152...63N 10.3847/0004-6256/152/3/63 1606.08923 free 6 C. R. Nugent A. Mainzer J. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. Wright December 2015 NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 9341381 Stephens Robert D. April 2014 Asteroids Observed from CS3: 2013 October–December Minor Planet Bulletin http://www.minorplanet.info/MPB/issues/MPB_41-2.pdf 41 2 92–95 2014MPBu...41...92S 1052-8091 1 March 2020 13 March 2020 https://web.archive.org/web/20200301164654/http://www.minorplanet.info/MPB/issues/MPB_41-2.pdf dead Menzies Kenneth T. July 2009 Lightcurve Analysis of 1125 China Minor Planet Bulletin http://www.minorplanet.info/MPB/issues/MPB_36-3.pdf 36 3 83–84 2009MPBu...36...83M 1052-8091 13 March 2020 26 November 2021 https://web.archive.org/web/20211126122428/http://www.minorplanet.info/MPB/issues/MPB_36-3.pdf 6 Hanuš J. Ďurech J. Oszkiewicz D. A. Behrend R. Carry B. Delbo M. Adam O. Afonina V. Anquetin R. Antonini P. Arnold L. Audejean M. Aurard P. Bachschmidt M. Baduel B. Barbotin E. Barroy P. Baudouin P. Berard L. Berger N. Bernasconi L. Bosch J. -G. Bouley S. Bozhinova I. Brinsfield J. Brunetto L. Canaud G. Caron J. Carrier F. Casalnuovo G. Casulli S. Cerda M. Chalamet L. Charbonnel S. Chinaglia B. Cikota A. Colas F. Coliac J. -F. Collet A. Coloma J. Conjat M. Conseil E. Costa R. Crippa R. Cristofanelli M. Damerdji Y. Debackère A. Decock A. Déhais Q. Déléage T. Delmelle S. Demeautis C. Dróżdż M. Dubos G. Dulcamara T. Dumont M. Durkee R. Dymock R. Escalante del Valle A. Esseiva N. Esseiva R. Esteban M. Fauchez T. Fauerbach M. Fauvaud M. Fauvaud S. Forné E. Fournel C. Fradet D. Garlitz J. Gerteis O. Gillier C. Gillon M. Giraud R. Godard J. -P. Goncalves R. Hamanowa Hiroko Hamanowa Hiromi Hay K. Hellmich S. Heterier S. Higgins D. Hirsch R. Hodosan G. Hren M. Hygate A. Innocent N. Jacquinot H. Jawahar S. Jehin E. Jerosimic L. Klotz A. Koff W. Korlevic P. Kosturkiewicz E. Krafft P. Krugly Y. Kugel F. Labrevoir O. Lecacheux J. Lehký M. Leroy A. Lesquerbault B. Lopez-Gonzales M. J. Lutz M. Mallecot B. Manfroid J. Manzini F. Marciniak A. Martin A. Modave B. Montaigut R. Montier J. Morelle E. Morton B. Mottola S. Naves R. Nomen J. Oey J. Ogłoza W. Paiella M. Pallares H. Peyrot A. Pilcher F. Pirenne J. -F. Piron P. Polińska M. Polotto M. Poncy R. Previt J. P. Reignier F. Renauld D. Ricci D. Richard F. Rinner C. Risoldi V. Robilliard D. Romeuf D. Rousseau G. Roy R. Ruthroff J. Salom P. A. Salvador L. Sanchez S. Santana-Ros T. Scholz A. Séné G. Skiff B. Sobkowiak K. Sogorb P. Soldán F. Spiridakis A. Splanska E. Sposetti S. Starkey D. Stephens R. Stiepen A. Stoss R. Strajnic J. Teng J. -P. Tumolo G. Vagnozzi A. Vanoutryve B. Vugnon J. M. Warner B. D. Waucomont M. Wertz O. Winiarski M. Wolf M. February 2016 New and updated convex shape models of asteroids based on optical data from a large collaboration network Astronomy and Astrophysics 586 A108 2016A&A...586A.108H 0004-6361 10.1051/0004-6361/201527441 1510.07422 119112278 Asteroid 1125 China Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1125+China 13 March 2020 https://web.archive.org/web/20200819132831/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1125+China 19 August 2020 dead Asteroid 1125 China – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1125 13 March 2020 External links Lightcurve Database Query (LCDB), at www.minorplanet.info Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR https://web.archive.org/web/20160729213840/http://obswww.unige.ch/~behrend/page_cou.html 29 July 2016 – Geneva Observatory, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1125 1124 Stroobantia 1125 1126 Otero 001125 001125 Category:Named minor planets 19571030