1123 Shapleya

Stony Florian asteroid October 2019 yes 1123 Shapleya #D6D6D6 21 September 1928 G. Neujmin Simeiz Obs. (1123) Shapleya 1928 ST1974 QQ 22016 FJ 6 Harlow Shapley(American astronomer) main-beltFlora 16 February 2017 (JD 2457800.5) 0 87.81 yr (32,073 days) 2.5741 AU 1.8758 AU 2.2250 AU 0.1569 3.32 yr (1,212 days) 207.68° 0.2970 ms / day 6.4212° 79.889° 317.60° 10.93 2.29 km11.282 0.136 km12.003 0.092 km12.08 km (taken)12.084 km12.32 0.84 km 20 h (dated)24 h (dated)52.92 0.01 h 0.2600 0.06300.274 0.0440.278 0.0370.27970.36 0.19 S 11.55 0.2911.59 0.1311.6011.7 1123 Shapleya, provisional designation 1928 ST, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 21 September 1928, by Russian astronomer Grigory Neujmin at Simeiz Observatory on the Crimean peninsula. It was named after American astronomer Harlow Shapley. Orbit and classification Shapleya is a S-type asteroid and member of the Flora family of stony asteroids, one of the largest families of the main belt. It orbits the Sun at a distance of 1.9–2.6 AU once every 3 years and 4 months (1,212 days). Its orbit has an eccentricity of 0.16 and an inclination of 6° with respect to the ecliptic. As no precoveries were taken, and no prior identifications were made, the body's observation arc begins with its official discovery observation at Simeiz. Lightcurves In November 2011, the so-far best rated rotational lightcurve of was obtained by American astronomer Robert Stephens at the Center for Solar System Studies in California. Lightcurve analysis gave a rotation period of 52.92 hours with a brightness variation of 0.38 magnitude (U=3-), superseding observations by Wiesław Z. Wiśniewski and a group of French, Italian and Swiss astronomers, that gave a shorter period of 20 and 24 hours, respectively (U=2/2). Shapleya has a relatively slow rotation period, as most minor planets have a spin rate between 2 and 20 hours. Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Shapleya measures between 10.93 and 12.32 kilometers in diameter, and its surface has an albedo between 0.26 and 0.36. The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE data, that is, an albedo of 0.2797 and a diameter of 12.084 kilometers with an absolute magnitude of 11.59. Naming This minor planet was named by the discoverer after Harlow Shapley (1885–1972), American astronomer and director of Harvard Observatory in Cambridge, Massachusetts. The lunar crater Shapley and the Shapley Supercluster are also named after him. Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 105). References 2016-07-14 last obs. JPL Small-Body Database Browser: 1123 Shapleya (1928 ST) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001123 Jet Propulsion Laboratory 14 March 2017 Dictionary of Minor Planet Names – (1123) Shapleya Schmadel Lutz D. Springer Berlin Heidelberg 95 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1124 (1123) Shapleya 1123 Shapleya (1928 ST) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1123 14 March 2017 Asteroids and comets rotation curves – (1123) Shapleya Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001123 14 March 2017 3 December 2002 https://web.archive.org/web/20021203214643/http://obswww.unige.ch/~behrend/page3cou.html#001123 dead 6 Joseph R. Masiero T. Grav A. K. Mainzer C. R. Nugent J. M. Bauer R. Stevenson S. Sonnett August 2014 Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 14 March 2017 1123 14 March 2017 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 (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 Petr Pravec Alan W. Harris Peter Kusnirák Adrián Galád Kamil Hornoch September 2012 Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P Icarus 221 1 365–387 2012Icar..221..365P 10.1016/j.icarus.2012.07.026 14 March 2017 11104/0217021 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 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 14 March 2017 W. Z. Wisniewski T. M. Michalowski A. W. Harris R. S. McMillan March 1995 Photoelectric Observations of 125 Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1995LPI....26.1511W Abstracts of the Lunar and Planetary Science Conference 26 1511 1995LPI....26.1511W 14 March 2017 Stephens, Robert D. April 2012 Asteroids Observed from GMARS and Santana Observatories: 2011 October- December http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39...80S The Minor Planet Bulletin 39 2 80–82 1052-8091 2012MPBu...39...80S 14 March 2017 6 Peter Veres Robert Jedicke Alan Fitzsimmons Larry Denneau Mikael Granvik Bryce Bolin Serge Chastel Richard J. Wainscoat William S. Burgett Kenneth C. Chambers Heather Flewelling Nick Kaiser Eugen A. Magnier Jeff S. Morgan Paul A. Price John L. Tonry Christopher Waters November 2015 Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V Icarus 261 34–47 2015Icar..261...34V 10.1016/j.icarus.2015.08.007 1506.00762 14 March 2017 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) 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 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1123 1122 Neith 1123 1124 Stroobantia 001123 Category:Discoveries by Grigory Neujmin Category:Named minor planets 19280921