1233 Kobresia

Carbonaceous background asteroid October 2019 yes 1233 Kobresia #D6D6D6 K. Reinmuth Heidelberg Obs. 10 October 1931 (1233) Kobresia 1931 TG 21927 TB1951 QJ1951 RP 11954 EG k oʊ ' b r iː z i @Thomas Henry Huxley (1897) Universal Dictionary of the English Language Kobresia (flowering plant) main-belt(inner)background 4 September 2017 (JD 2458000.5) 0 90.15 yr (32,928 days) 2.6976 AU 2.4143 AU 2.5560 AU 0.0554 4.09 yr (1,493 days) 117.22° 0.2412 ms / day 5.6024° 291.43° 335.02° 29.73 7.16 km30.239 10.28 km31.46 15.67 km33.323 0.159 km33.45 km (derived)33.50 0.8 km36.06 0.60 km36.167 0.249 km 27.76 0.05 h27.83 0.01 h 0.0305 0.04200.0396 (derived)0.040 0.0080.04 0.020.04 0.080.0408 0.00740.041 0.0020.047 0.0070.0475 0.002 CS (assumed) 11.3011.5011.5711.9111.91 1.30 1233 Kobresia, provisional designation 1931 TG 2, is a carbonaceous background asteroid from the central regions of the asteroid belt, approximately 33 kilometers in diameter. It was discovered on 10 October 1931, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid was named for the grass-like flowering plant Kobresia, a genus in the sedge family. Orbit and classification Kobresia is a non-family asteroid from the main belt's background population. It orbits the Sun in the central main-belt at a distance of 2.4–2.7 AU once every 4 years and 1 month (1,493 days; semi-major axis of 2.56 AU). Its orbit has an eccentricity of 0.06 and an inclination of 6° with respect to the ecliptic. The body's observation arc begins with its first observation as 1927 TB at Heidelberg in October 1927, or four years prior to its official discovery observation. Physical characteristics Kobresia has been characterized as a carbonaceous C-type asteroid by Pan-STARRS photometric survey. Rotation period Two rotational lightcurves of Kobresia were obtained by French amateur astronomer Pierre Antonini. Lightcurve analysis of his photometric observations made in 2004 and 2006, gave a rotation period of 27.76 and 27.83 hours with a brightness amplitude of 0.32 and 0.34 magnitude, respectively (U=2/2). While not being a slow rotator, Kobresias period is longer than that of the average asteroid. 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, Kobresia measures between 29.73 and 36.167 kilometers in diameter and its surface has an albedo between 0.0305 and 0.0475. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0396 and a diameter of 33.45 kilometers based on an absolute magnitude of 11.5. Naming This minor planet was named after a genus in the family Cyperaceae, Kobresia, a grass-like flowering plant, commonly known as "bog sedges". The author of the Dictionary of Minor Planet Names contacted Dutch astronomer Ingrid van Houten-Groeneveld in order to confirm the meaning of this asteroid's name. Meta-naming The initials of the minor planets 1227 (1227) through 1234 (1234), all discovered by Reinmuth, spell out "G. Stracke". Gustav Stracke was a German astronomer and orbit computer, who had asked that no planet be named after him. In this manner Reinmuth was able to honour the man whilst honoring his wish. Nevertheless, Reinmuth directly honored Stracke by naming planet 1019 1019 Strackea later on. The astronomer Brian Marsden was honored by the same type of meta-naming using consecutive initial letters in 1995, spelling out "Brian M." in the sequence of minor planets 5694 (5694) through 5699 (5699). Reinmuth's flowers Due to his many discoveries, Karl Reinmuth submitted a large list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between 1009 (1009) and 1200 (1200). This list also contained a sequence of 28 asteroids, starting with 1054 Forsytia, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants). References 30em 2017-11-27 last obs. JPL Small-Body Database Browser: 1233 Kobresia (1931 TG2) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001233 https://web.archive.org/web/20200918043041/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001233 dead 18 September 2020 Jet Propulsion Laboratory 9 January 2018 Dictionary of Minor Planet Names – (1233) Kobresia Schmadel Lutz D. Springer Berlin Heidelberg 102 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1234 (1233) Kobresia Dictionary of Minor Planet Names – (1234) Elyna Schmadel Lutz D. Springer Berlin Heidelberg 102–103 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1235 (1234) Elyna Dictionary of Minor Planet Names – (1054) Forsytia Schmadel Lutz D. Springer Berlin Heidelberg 90 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1055 (1054) Forsytia 1233 Kobresia (1931 TG2) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1233 9 January 2018 Asteroids and comets rotation curves – (1233) Kobresia Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001233 9 January 2018 23 April 2019 https://web.archive.org/web/20190423121547/http://obswww.unige.ch/~behrend/page3cou.html#001233 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 1233 Kobresia – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1233 29 October 2019 1233 9 January 2018 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 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 9 January 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) 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 9 January 2018 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 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 9 January 2018 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 1233 1232 Cortusa 1233 1234 Elyna 001233 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19311010