1850 Kohoutek

Stony main-belt asteroid October 2019 yes 1850 Kohoutek #D6D6D6 23 March 1942 K. Reinmuth Heidelberg Obs. (1850) Kohoutek 1942 EN1949 KD1953 SH1959 GR1965 AQ Luboš Kohoutek (astronomer) main-beltFlora 4 September 2017 (JD 2458000.5) 0 75.20 yr (27,468 days) 2.5338 AU 1.9679 AU 2.2508 AU 0.1257 3.38 yr (1,233 days) 63.537° 0.2919 ms / day 4.0510° 68.923° 190.65° 5.91 0.24 km6.05 km (calculated)7.642 0.086 km 3.68 0.01 h 0.181 0.0180.24 (assumed)0.383 0.127 S 12.812.81 0.09 (R)12.913.26 1850 Kohoutek, provisional designation 1942 EN, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was named after Czech astronomer Luboš Kohoutek. Discovery Kohoutek was discovered during World War II on 23 March 1942, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany, Ten days prior to its discovery, the body was observed at Turku Observatory, Finland. However, these observations are not considered for the asteroid's orbital computation and its observation arc begins with the discovery observation at Heidelberg. Since the discovery was made in the second half of March, the letter "E" in the provisional designation is erroneous. It should have been "F", but the initially incorrect assignment has persisted.November 2015 Classification and orbit It is a member of the Flora family, one of the largest families of stony asteroids in the asteroid belt. It orbits the Sun in the inner main-belt at a distance of 2.0–2.5 AU once every 3 years and 5 months (1,233 days). Its orbit has an eccentricity of 0.13 and an inclination of 4° with respect to the ecliptic. Physical parameters Rotation period In December 2014, a rotational lightcurve of Kohoutek was obtained from photometric observations in the R-band at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 3.68 hours with a brightness variation of 0.31 magnitude (U=2). Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Kohoutek measures 5.91 and 7.64 kilometers in diameter, and its surface has an albedo of 0.181 and 0.383, respectively. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, a S-type asteroid and the family's largest member and namesake – and calculates a diameter of 6.05 kilometers with an absolute magnitude of 13.26. Naming This minor planet was named in honor of the Czech astronomer, Luboš Kohoutek (born 1935), former staff member of the Hamburg-Bergedorf Observatory and prolific observer and discoverer of minor planets and comets, most notably 75D/Kohoutek, 76P/West–Kohoutek–Ikemura, and the long-period Comet Kohoutek. He has also contributed in the fields of planetary nebulae and emission-line stars. The official 1850 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3935). References 30em 2017-06-05 last obs. JPL Small-Body Database Browser: 1850 Kohoutek (1942 EN) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001850 https://web.archive.org/web/20200918050915/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001850 18 September 2020 Jet Propulsion Laboratory 1 July 2017 Dictionary of Minor Planet Names – (1850) Kohoutek Schmadel Lutz D. Springer Berlin Heidelberg 148 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1851 (1850) Kohoutek 1850 Kohoutek (1942 EN) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1850 8 September 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 2009 https://archive.org/details/dictionaryminorp2008schm limited Appendix – Publication Dates of the MPCs Schmadel Lutz D. Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 2009dmpn.book.....S 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 118745497 8 September 2016 1850 7 April 2017 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 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 7 April 2017 6 Chan-Kao Chang Hsing-Wen Lin Wing-Huen Ip Ip Wing-huen Thomas A. Prince Shrinivas R. Kulkarni David Levitan Russ Laher Jason Surace December 2016 Large Super-fast Rotator Hunting Using the Intermediate Palomar Transient Factory The Astrophysical Journal Supplement Series 227 2 13 2016ApJS..227...20C 10.3847/0067-0049/227/2/20 1608.07910 free 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 1850 1849 Kresák 1850 1851 Lacroute 001850 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19420323