1354 Botha

Exceptionally dark background asteroid October 2019 yes 1354 Botha #D6D6D6 C. Jackson Johannesburg Obs. 3 April 1935 (1354) Botha 1935 GK1925 RF1930 KG1931 TP1935 JK1953 TO 11953 TY 2 Louis Botha(South African prime minister) main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 85.55 yr (31,248 days) 3.8022 AU 2.4451 AU 3.1237 AU 0.2172 5.52 yr (2,017 days) 255.58° 0.1785 ms / day 5.9581° 28.715° 250.45° 38.41 12.74 km41.732 0.504 km42.54 0.69 km46.567 0.550 km48.75 5.8 km48.82 km (derived)70.34 0.88 km 4 h (poor) 0.014 0.0030.0225 0.0060.0246 0.00470.0295 (derived)0.030 0.0010.05 0.04 C (assumed) 11.0011.0311.20 0.3511.30 1354 Botha, provisional designation 1935 GK, is an exceptionally dark background asteroid from the outer regions of the asteroid belt, approximately 46 kilometers in diameter. It was discovered on 3 April 1935, by South-African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named after South African prime minister Louis Botha. Orbit and classification Botha 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 2.4–3.8 AU once every 5 years and 6 months (2,017 days; semi-major axis of 3.12 AU). Its orbit has an eccentricity of 0.22 and an inclination of 6° with respect to the ecliptic. The asteroid was first identified as 1925 RF at Heidelberg Observatory in September 1929. The body's observation arc begins at with its identification as 1931 TP at Simeiz Observatory in October 1931, more than three years prior to its official discovery observation at Johannesburge. Physical characteristics Botha is an assumed carbonaceous C-type asteroid. Rotation period In September 2003, a fragmentary rotational lightcurve of Botha was obtained from photometric observations by Swiss astronomers Stefano Sposetti and Raoul Behrend. Lightcurve analysis gave a tentative rotation period of 4 hours with a brightness amplitude of 0.21 magnitude (U=1+). As of 2017, no secure period has been obtained. 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, Botha measures between 38.41 and 70.34 kilometers in diameter and its surface has an albedo between 0.014 and 0.05. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0295 and a diameter of 48.82 kilometers based on an absolute magnitude of 11.0. Naming This minor planet was named after Louis Botha (1862–1919), the first Prime Minister of South Africa of the Union of South Africa, which existed between 1910 and 1961. The official 1354 naming citation was published by the Minor Planet Center in April 1953 (M.P.C. 908). References 30em 2017-04-30 last obs. JPL Small-Body Database Browser: 1354 Botha (1935 GK) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001354 Jet Propulsion Laboratory 15 November 2017 Dictionary of Minor Planet Names – (1354) Botha Schmadel Lutz D. Springer Berlin Heidelberg 110 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1355 (1354) Botha 1354 Botha (1935 GK) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1354 15 November 2017 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. 2009 Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 2009dmpn.book.....S Asteroids and comets rotation curves – (1354) Botha Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001354 15 November 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001354 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 119293330 15 November 2017 Asteroid 1354 Botha – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1354 29 October 2019 1354 15 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 46350317 15 November 2017 6 C. R. Nugent A. Mainzer J. Bauer R. M. Cutri E. A. Kramer T. Grav J. Masiero S. Sonnett E. L. Wright September 2016 NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos The Astronomical Journal 152 3 12 2016AJ....152...63N 10.3847/0004-6256/152/3/63 1606.08923 free 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 – IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 17 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 35447010 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 53493339 15 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 1354 1353 Maartje 1354 1355 Magoeba 001354 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 19350403