1197 Rhodesia

Asteroid July 2018 yes 1197 Rhodesia #D6D6D6 001197-asteroid shape model (1197) Rhodesia.png Shape model of Rhodesia from its lightcurve C. Jackson Johannesburg Obs. 9 June 1931 (1197) Rhodesia 1931 LD1925 AC1970 HL Rhodesia(former state in southern Africa) main-belt(outer)background 23 March 2018 (JD 2458200.5) 0 93.36 yr (34,098 d) 3.5511 AU 2.2215 AU 2.8863 AU 0.2303 4.90 yr (1,791 d) 323.09° 0.2010 ms / day 12.985° 255.74° 277.16° 48.0 x 48.0 km 47.50 3.4 km47.741 0.163 km48.92 0.98 km 16.060 0.006 h 0.0700.0750.0783 B–V 0.740 030C (assumed) 10.0010.1810.2 1197 Rhodesia, provisional designation 1931 LD, is a dark background asteroid from the outer regions of the asteroid belt, approximately 48 km mi off 2 us in diameter. It was discovered on 9 June 1931, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The likely C-type asteroid has a rotation period of 16.1 hours. It was named for Rhodesia, a former British colony and unrecognised state, which is now Zimbabwe. Orbit and classification Rhodesia is a non-family asteroid from the main belt's background population. It orbits the Sun in the outer asteroid belt at a distance of 2.2–3.6 AU once every 4 years and 11 months (1,791 days; semi-major axis of 2.89 AU). Its orbit has an eccentricity of 0.23 and an inclination of 13° with respect to the ecliptic. The asteroid was first observed at Heidelberg Observatory in January 1925. The body's observation arc also begins at Heidelberg in August 1942, more than 11 years after its official discovery observation at Johannesburg. Naming This minor planet was named for the former British colony and unrecognized state of Rhodesia (1965–1979) in southern Africa, what is now Zimbabwe. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 111). Physical characteristics Rhodesia is an assumed C-type asteroid which agrees with its albedo and its location in the main belt. It has a B–V color index of 0.740. Rotation period In December 2017, a rotational lightcurve of Rhodesia was obtained from photometric observations by Tom Polakis at the Command Module Observatory V02 in Tempe, Arizona. Lightcurve analysis gave a rotation period of 16.060 0.006 hours with a brightness variation of 0.27 magnitude (U=3-). This result refines previous period determinations of 15.89 and 16.062 hours by Richard Binzel (1984) and Laurent Bernasconi (2005), respectively (U=2/2). 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 Wide-field Infrared Survey Explorer, Rhodesia measures between 46.43 and 52.276 kilometers in diameter and its surface has an albedo between 0.0548 and 0.0783. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0666 and a diameter of 47.40 kilometers based on an absolute magnitude of 10.18. In August 2015, an occultation by Rhodesia determined a cross-section of 48.0 × 48.0 kilometers (no fit). References 30em 2018-05-24 last obs. JPL Small-Body Database Browser: 1197 Rhodesia (1931 LD) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001197 Jet Propulsion Laboratory 31 July 2018 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 100 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1198 (1197) Rhodesia 1197 Rhodesia (1931 LD) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1197 31 July 2018 Asteroids and comets rotation curves – (1197) Rhodesia Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001197 31 July 2018 3 December 2002 https://web.archive.org/web/20021203214643/http://obswww.unige.ch/~behrend/page3cou.html#001197 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 The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 119293330 Asteroid (1197) Rhodesia – Proper elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=1197&pc=1.1.6 25 May 2018 Asteroid 1197 Rhodesia Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1197+Rhodesia 31 July 2018 https://web.archive.org/web/20180731213223/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1197+Rhodesia 31 July 2018 dead 1197 31 July 2018 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 The Astrophysical Journal Letters 759 1 5 2012ApJ...759L...8M 10.1088/2041-8205/759/1/L8 1209.5794 46350317 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 6 A. K. Mainzer J. M. Bauer R. M. Cutri T. Grav E. A. Kramer J. R. Masiero C. R. Nugent S. M. Sonnett R. A. Stevenson E. L. Wright June 2016 NEOWISE Diameters and Albedos V1.0 https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_COMPIL_5_NEOWISEDIAM_V1_0/data/neowise_mainbelt.tab NASA Planetary Data System EAR-A-COMPIL-5-NEOWISEDIAM-V1.0 2016PDSS..247.....M 31 July 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) 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 – IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 31 July 2018 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 (catalog) Binzel, R. P. October 1987 A photoelectric survey of 130 asteroids Icarus 72 1 135–208 0019-1035 1987Icar...72..135B 10.1016/0019-1035(87)90125-4 Polakis, Tom April 2018 Lightcurve Analysis for Eleven Main-belt Asteroids The Minor Planet Bulletin 45 2 199–203 1052-8091 2018MPBu...45..199P 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 1197 1196 Sheba 1197 1198 Atlantis 001197 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 19310609