1506 Xosa

Main-belt asteroid April 2018 yes 1506 Xosa #D6D6D6 15 May 1939 C. Jackson Johannesburg Obs. (1506) Xosa 1939 JC Xhosa people(Bantu ethnic group) main-belt(middle) 4 September 2017 (JD 2458000.5) 0 77.97 yr (28,477 days) 3.2408 AU 1.9052 AU 2.5730 AU 0.2595 4.13 yr (1,507 days) 338.30° 0.2388 ms / day 12.550° 234.53° 45.154° 11.83 km (calculated)13.963 0.702 km 5.90 0.01 h (dated)5.9 0.1 h (dated)292 3 h298.0659 5.5273 h 0.157 0.0370.20 (assumed) S 11.820 0.003 (R)11.9012.0 1506 Xosa (provisional designation 1939 JC) is a stony asteroid and slow rotator from the middle region of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 15 May 1939, by English-born, South African astronomer Cyril Jackson at the Johannesburg Observatory in South Africa. It is named for the Xhosa people. Orbit and classification The S-type asteroid orbits the Sun at a distance of 1.9–3.2 AU once every 4 years and 2 months (1,507 days). Its orbit has an eccentricity of 0.26 and an inclination of 13° with respect to the ecliptic. Xosa's observation arc begins with its official discovery observation, as no precoveries were taken and no prior identifications were made. Physical characteristics Slow rotator In Fall 2010, lightcurve photometry by Brian Warner and at the Palomar Transient Factory revealed that Xosa is a slow rotator with a notably long rotation period of 292 and 298 hours and a brightness variation of 0.70 and 0.42 magnitude, respectively (U=2+/2). It also seems to be in a non-principal axis rotation (NPAR), colloquially called as "tumbling". However, observations are insufficient to determine the body's tumbling, or to rule out a non-tumbling state (T0). These observations superseded previous periods obtained in 2001 and 2005 (U=1/1). Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Xosa measures 13.96 kilometers in diameter and its surface has an albedo of 0.157, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 11.83 kilometers using an absolute magnitude of 12.0. Naming This minor planet was named after the Xhosa (formerly spelled "Xosa"), a Bantu ethnic group of native people in south-east South Africa, and who came into early contact with the white settlers. The official 1506 naming citation was published by the Minor Planet Center in April 1953 (M.P.C. 909). References 30em 2017-05-02 last obs. JPL Small-Body Database Browser: 1506 Xosa (1939 JC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001506 Jet Propulsion Laboratory 5 June 2017 Dictionary of Minor Planet Names – (1506) Xosa Schmadel Lutz D. Springer Berlin Heidelberg 120 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1507 (1506) Xosa 1506 Xosa (1939 JC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1506 4 January 2017 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 Asteroids and comets rotation curves – (1506) Xosa Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001506 4 January 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001506 dead 1506 4 January 2017 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri C. Nugent M. S. Cabrera November 2012 Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M The Astrophysical Journal Letters 759 1 5 2012ApJ...759L...8M 10.1088/2041-8205/759/1/L8 1209.5794 4 January 2017 L. E. Robinson B. D. Warner March 2002 A Collaborative Work on Three Asteroid Lightcurves: 506 Marion, 585 Bilkis, 1506 Xosa http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MPBu...29....6R The Minor Planet Bulletin 29 6–7 2002MPBu...29....6R 4 January 2017 George Stecher Lyle Ford Natalie Bianchi Brian D. Warner Larry Robinson October 2009 On the Period of 1506 Xosa http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2009MPBu...36..138S The Minor Planet Bulletin 36 4 138–139 1052-8091 2009MPBu...36..138S 4 January 2017 Warner, Brian D. April 2011 Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2010 September–December http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38...82W The Minor Planet Bulletin 38 2 82–86 1052-8091 2011MPBu...38...82W 4 January 2017 6 Adam Waszczak Chan-Kao Chang Eran O. Ofek Russ Laher Frank Masci David Levitan Jason Surace Yu-Chi Cheng Wing-Huen Ip Daisuke Kinoshita George Helou Thomas A. Prince Shrinivas Kulkarni September 2015 Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W The Astronomical Journal 150 3 35 2015AJ....150...75W 10.1088/0004-6256/150/3/75 1504.04041 4 January 2017 External links Lightcurve plot of 1506 Xosa, Palmer Divide Observatory, B. D. Warner (2001) 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 1506 1505 Koranna 1506 1507 Vaasa 001506 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 001506 19390515