1264 Letaba

Carbonaceous asteroid October 2019 yes 1264 Letaba #D6D6D6 C. Jackson Johannesburg Obs. 21 April 1933 (1264) Letaba 1933 HG1930 WC1954 YB1962 HJ1964 VB Letaba River(South African river) main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 84.54 yr (30,877 days) 3.3108 AU 2.4225 AU 2.8667 AU 0.1549 4.85 yr (1,773 days) 112.30° 0.2031 ms / day 24.953° 235.05° 31.529° 66.040 0.405 km67.76 17.00 km67.79 17.67 km70.180 23.32 km70.34 0.77 km73.629 0.870 km74.35 km (derived)74.74 2.1 km 12 h16 h32.16 0.03 h32.74 0.02 h (best)33.27 0.01 h63.74 0.01 h 0.0407 0.04320.0462 (derived)0.05 0.070.05 0.090.0725 0.0040.0746 0.01140.082 0.0020.093 0.027 SMASS C 9.109.609.679.709.87 0.22 1264 Letaba, provisional designation 1933 HG, is a carbonaceous asteroid and possible tumbler from the background population of the outer asteroid belt, approximately 70 kilometers in diameter. It was discovered on 21 April 1933, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named for the Letaba River in eastern South Africa. Orbit and classification Letaba 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 2.4–3.3 AU once every 4 years and 10 months (1,773 days; semi-major axis of 2.87 AU). Its orbit has an eccentricity of 0.15 and an inclination of 25° with respect to the ecliptic. The asteroid was first identified as 1930 WC at Simeiz Observatory in November 1930. The body's observation arc begins at Johannesburg, the night before its official discovery observation. Physical characteristics In the SMASS classification, Letaba is a carbonaceous C-type asteroid. Rotation period Several rotational lightcurves of Letaba have been obtained from photometric observations since 2002. The best-rated lightcurve was measured by the Spanish amateur astronomer group OBAS in July 2016. It gave a longer-than average rotation period of 32.74 hours with a brightness variation of 0.28 magnitude (U=3). It might be a tumbler due to the lightcurve's inconsistent slope segments (T?). Based on its current diameter estimate, Letaba would be the second-largest tumbler just behind the Hildian asteroid 1512 Oulu (see List of tumblers). 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, Letaba measures between 66.040 and 74.74 kilometers in diameter and its surface has an albedo between 0.0407 and 0.093. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0462 and a diameter of 74.35 kilometers based on an absolute magnitude of 9.6. Naming This minor planet was named after the Letaba River, located in eastern South Africa. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 116). References 30em 2017-11-02 last obs. JPL Small-Body Database Browser: 1264 Letaba (1933 HG) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001264 https://web.archive.org/web/20200918043043/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001264 dead 18 September 2020 Jet Propulsion Laboratory 22 November 2017 Dictionary of Minor Planet Names – (1264) Letaba Schmadel Lutz D. Springer Berlin Heidelberg 105 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1265 (1264) Letaba 1264 Letaba (1933 HG) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1264 22 November 2017 Asteroids and comets rotation curves – (1264) Letaba Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001264 22 November 2017 23 April 2019 https://web.archive.org/web/20190423121547/http://obswww.unige.ch/~behrend/page3cou.html#001264 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 1264 Letaba – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1264 29 October 2019 1264 22 November 2017 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 35447010 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) 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 Joseph R. Masiero C. Nugent A. K. Mainzer E. L. Wright J. M. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett October 2017 NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos The Astronomical Journal 154 4 10 2017AJ....154..168M 10.3847/1538-3881/aa89ec 1708.09504 free 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 9341381 22 November 2017 6 Pedro Brines Juan Lozano Onofre Rodrigo A. Fornas David Herrero Vicente Mas G. Fornas Carreñ A. o Enrique Arce April 2017 Sixteen Asteroids Lightcurves at Asteroids Observers (OBAS) - MPPD: 2016 June–November http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017MPBu...44..145B The Minor Planet Bulletin 44 2 145–149 1052-8091 2017MPBu...44..145B 22 November 2017 Stephens, Robert D. December 2002 Photometry of 430 Hybris, 798 Ruth, 1264 Letaba, and 3786 Yamada http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2003MPBu...30....1S The Minor Planet Bulletin 30 1 1–2 1052-8091 2003MPBu...30....1S 22 November 2017 Julian Oey Hasen Williams Roger Groom July 2017 Lightcurve Analysis of Asteroids from BMO and DRO in 2015 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017MPBu...44..200O The Minor Planet Bulletin 44 3 200–204 1052-8091 2017MPBu...44..200O 22 November 2017 Ferrro, Andrea April 2017 Rotational Period of Three Main-belt Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017MPBu...44..142F The Minor Planet Bulletin 44 2 142 1052-8091 2017MPBu...44..142F 22 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 53493339 22 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 1264 1263 Varsavia 1264 1265 Schweikarda 001264 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 001264 19330421