1349 Bechuana

Main-belt asteroid October 2019 yes 1349 Bechuana #D6D6D6 File:001349-asteroid shape model (1349) Bechuana.png Shape model of Bechuana from its lightcurve C. Jackson Johannesburg Obs. 13 June 1934 (1349) Bechuana 1934 LJ1934 NH1950 PA1950 QO Bechuanaland(now Republic of Botswana) main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 83.06 yr (30,338 days) 3.4872 AU 2.5416 AU 3.0144 AU 0.1569 5.23 yr (1,912 days) 336.81° 0.1883 ms / day 10.049° 307.12° 305.30° 23.773 0.282 km24.249 0.334 km25.80 0.37 km28.57 1.17 km46.30 km (calculated) 15.681 0.0099 h15.6873 0.0001 h15.692 0.002 h 0.057 (assumed)0.150 0.0240.233 0.0080.2610 0.0357 CXC (assumed) 10.2010.23 0.4410.250 0.002 (R)10.4010.5 1349 Bechuana, provisional designation 1934 LJ, is a background asteroid from the outer regions of the asteroid belt, approximately 26 kilometers in diameter. It was discovered on 13 June 1934, by South-African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named for the former Bechuanaland, what is now the Republic of Botswana. Orbit and classification Bechuana 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 2.5–3.5 AU once every 5 years and 3 months (1,912 days; semi-major axis of 3.01 AU). Its orbit has an eccentricity of 0.16 and an inclination of 10° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Johannesburg in June 1934. Physical characteristics Bechuana has been characterized as both a C-type and X-type asteroid by Pan-STARRS photometric survey. The Collaborative Asteroid Lightcurve Link (CALL) assumes it to be a carbonaceous C-type. Rotation period In December 2010, a rotational lightcurve of Bechuana was obtained from photometric observations by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 15.681 hours with a brightness variation of 0.29 magnitude (U=2). In January 2011, astronomers Pierre Antonini and Silvano Casulli measured a refined period of 15.692 hours with an amplitude of 0.30 (U=3-). Poles A 2016-published lightcurve, using modeled photometric data from the Lowell Photometric Database, gave a concurring period of 15.6873 hours and determined two spin axis in ecliptic coordinates (λ, β) of (153.0°, 32.0°) and (314.0°, 46.0°). 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, Bechuana measures between 23.773 and 28.57 kilometers in diameter and its surface has an albedo between 0.150 and 0.2610. CALL assumes a standard albedo for carbonaceous asteroids of 0.057 and consequently calculates a much larger diameter of 46.30 kilometers based on an absolute magnitude of 10.4. Naming This minor planet was named after the Bechuanaland, a British Protectorate from 1884 to 1966 and what is now the Republic of Botswana, north of South Africa. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 122). References 30em 2017-07-05 last obs. JPL Small-Body Database Browser: 1349 Bechuana (1934 LJ) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001349 Jet Propulsion Laboratory 16 November 2017 Dictionary of Minor Planet Names – (1349) Bechuana Schmadel Lutz D. Springer Berlin Heidelberg 110 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1350 (1349) Bechuana 1349 Bechuana (1934 LJ) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1349 16 November 2017 Asteroids and comets rotation curves – (1349) Bechuana Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001349 16 November 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001349 dead 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 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M The Astrophysical Journal 741 2 20 2011ApJ...741...68M 10.1088/0004-637X/741/2/68 1109.4096 16 November 2017 Asteroid 1349 Bechuana – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1349 29 October 2019 1349 16 November 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 16 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 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 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 16 November 2017 J. Durech J. Hanus D. Oszkiewicz R. Vanco March 2016 Asteroid models from the Lowell photometric database http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...587A..48D Astronomy and Astrophysics 587 6 2016A&A...587A..48D 10.1051/0004-6361/201527573 1601.02909 16 November 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 16 November 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 1349 1348 Michel 1349 1350 Rosselia 001349 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 19340613