1356 Nyanza

Dark asteroid from the background population of the outer asteroid belt October 2019 yes 1356 Nyanza #D6D6D6 001356-asteroid shape model (1356) Nyanza.png Modelled shape of Nyanza from its lightcurve C. Jackson Johannesburg Obs. 3 May 1935 (1356) Nyanza 1935 JH1929 EL1929 JH1929 JJ1931 TB 3 Nyanza Province(former province of Kenya) main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 86.06 yr (31,435 days) 3.2359 AU 2.9288 AU 3.0823 AU 0.0498 5.41 yr (1,977 days) 307.99° 0.1821 ms / day 7.9461° 69.627° 302.27° 60.078 0.289 km60.895 0.757 km61.05 20.58 km62.46 0.89 km64.59 km (derived)64.73 5.1 km 12.422 0.006 h 0.0352 (derived)0.04 0.020.0462 0.0080.050 0.0020.052 0.0070.0537 0.0090 PC (assumed) 9.9010.20 1356 Nyanza, provisional designation 1935 JH, is a dark asteroid from the background population of the outer asteroid belt, approximately 63 kilometers in diameter. It was discovered on 3 May 1935, by South-African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named for the former Nyanza Province in Kenya, Africa. Orbit and classification Nyanza is a non-family asteroid of the main belt's background population. It orbits the Sun in the outer asteroid belt at a distance of 2.9–3.2 AU once every 5 years and 5 months (1,977 days; semi-major axis of 3.08 AU). Its orbit has an eccentricity of 0.05 and an inclination of 8° with respect to the ecliptic. The asteroid was first identified as 1929 EL at Heidelberg Observatory and as 1929 JH and 1929 JJ at Lowell Observatory in March and May 1929, respectively. The body's observation arc begins at Lowell Observatory in October 1931, three and a half years prior to its official discovery observation at Johannesburg. Naming This minor planet was named for the former Nyanza Province located in southwestern Kenya, bordering on Lake Victoria. Its provincial capital was Kisumu. In 2010, Kenya's 8 provinces were reorganized into 47 counties. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 123). Physical characteristics Nyanza has been characterized as a primitive P-type asteroid by the Wide-field Infrared Survey Explorer (WISE). It is also an assumed carbonaceous C-type. Rotation period In May 2005, a rotational lightcurve of Nyanza was obtained from photometric observations by French amateur astronomer Pierre Antonini. Lightcurve analysis gave a well-defined rotation period of 12.422 hours with a brightness amplitude of 0.28 magnitude (U=3). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's WISE telescope, Nyanza measures between 60.078 and 64.73 kilometers in diameter and its surface has an albedo between 0.04 and 0.0537. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0352 and a diameter of 64.59 kilometers based on an absolute magnitude of 10.2. References 30em 2017-11-02 last obs. JPL Small-Body Database Browser: 1356 Nyanza (1935 JH) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001356 Jet Propulsion Laboratory 15 November 2017 Dictionary of Minor Planet Names – (1356) Nyanza Schmadel Lutz D. Springer Berlin Heidelberg 110 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1357 (1356) Nyanza 1356 Nyanza (1935 JH) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1356 15 November 2017 Asteroids and comets rotation curves – (1356) Nyanza Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001356 15 November 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001356 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 15 November 2017 Asteroid 1356 Nyanza – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1356 29 October 2019 1356 15 November 2017 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 15 November 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) E. F. Tedesco P. V. Noah M. Noah S. D. Price October 2004 IRAS Minor Planet Survey V6.0 https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab NASA Planetary Data System 12 IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 22 October 2019 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 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 1356 1355 Magoeba 1356 1357 Khama 001356 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 19350503