1023 Thomana

Rare-type carbonaceous background asteroid October 2019 yes 1023 Thomana #D6D6D6 001023-asteroid shape model (1023) Thomana.png Shape model of Thomana from its lightcurve 25 June 1924 K. Reinmuth Heidelberg Obs. (1023) Thomana 1924 RU1936 RG St. Thomas Choir of Leipzig(German boys' choir) main-belt(outer) 4 September 2017 (JD 2458000.5) 0 92.86 yr (33,916 days) 3.4893 AU 2.8442 AU 3.1667 AU 0.1019 5.64 yr (2,058 days) 107.00° 0.1749 ms / day 10.078° 194.32° 194.19° 53.28 20.25 km58.27 1.6 km (IRAS:11)61.02 1.00 km61.34 4.17 km 17.56 0.05 h17.56 0.01 h17.561 0.007 h17.5611 0.0005 h 0.05 0.050.059 0.0120.060 0.0020.0649 0.004 (IRAS:11) Tholen = GGB–V = 0.764U–B = 0.493 9.769.9910.26 0.57 1023 Thomana, provisional designation 1924 RU, is a rare-type carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 58 kilometers in diameter. It was discovered on 25 June 1924, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. The asteroid was named after the St. Thomas Choir of Leipzig. Classification and orbit Thomana orbits the Sun in the outer main-belt at a distance of 2.8–3.5 AU once every 5 years and 8 months (2,058 days). Its orbit has an eccentricity of 0.10 and an inclination of 10° with respect to the ecliptic. The asteroid's observation arc begins at Heidelberg, one night after its official discovery observation. Physical characteristics In the Tholen classification, Thomana is an uncommon carbonaceous G-type asteroid. Rotation period Between 2006 and 2009, three rotational lightcurves of Thomana were obtained from photometric observations by astronomers James W. Brinsfield, Pierre Antonini as well as René Roy and Laurent Bernasconi. Lightcurve analysis gave a concurring rotation period of 17.56 hours with a brightness variation between 0.27 and 0.36 magnitude (U=2/2/3-). Spin axis In 2016, an international study modeled a lightcurve from various data sources with a period of 17.5611 hours and found two spin axis of (86.0°, −65.0°) and (272.0°, −42.0°), respectively, in ecliptic coordinates (λ, β) (Q=n.a.). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Thomana measures between 53.28 and 61.34 kilometers in diameter and its surface has an albedo between 0.05 and 0.065. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is an albedo of 0.0649 and a diameter of 58.27 kilometers based on an absolute magnitude of 9.76. Naming This minor planet was named by the discoverer after the St. Thomas Choir of Leipzig ("Thomanerchor"), a boys' choir at St. Thomas Church in Leipzig, Germany, where Johann Sebastian Bach used to work as music director. The official naming citation was published by Paul Herget in The Names of the Minor Planets in 1955 (H 98; LDS). References 2017-05-04 last obs. JPL Small-Body Database Browser: 1023 Thomana (1924 RU) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001023 Jet Propulsion Laboratory 3 August 2017 Dictionary of Minor Planet Names – (1023) Thomana Schmadel Lutz D. Springer Berlin Heidelberg 88 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1024 (1023) Thomana 1023 Thomana (1924 RU) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1023 3 August 2017 Asteroids and comets rotation curves – (1023) Thomana Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001023 3 August 2017 3 December 2002 https://web.archive.org/web/20021203214643/http://obswww.unige.ch/~behrend/page3cou.html#001023 dead 1023 3 August 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 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 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 3 August 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 Brinsfield, James W. April 2010 Asteroid Lightcurve Analysis at Via Capote Observatory: 4th Quarter 2009 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37...50B The Minor Planet Bulletin 37 2 50–53 1052-8091 2010MPBu...37...50B 3 August 2017 6 J. Hanus J. Durech D. A. Oszkiewicz R. Behrend B. Carry M. Delbo O. Adam V. Afonina R. Anquetin P. Antonini L. Arnold M. 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Wolf February 2016 New and updated convex shape models of asteroids based on optical data from a large collaboration network Astronomy and Astrophysics 586 24 2016A&A...586A.108H 10.1051/0004-6361/201527441 1510.07422 119112278 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 3 August 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 – Geneva Observatory, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1023 1023 Thomana (1924 RU) 2001023 1022 Olympiada 1023 1024 Hale 001023 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001023 19240625