1842 Hynek

Stony main-belt asteroid October 2019 yes 1842 Hynek #D6D6D6 14 January 1972 L. Kohoutek Hamburg Observatory (1842) Hynek 1972 AA1928 DE1929 SO1952 DN 21953 UV1962 EA1963 SS1964 YF1966 HE1969 EG 12004 TE 363 Hynek Kohoutek(father of discoverer) main-beltFlora 4 September 2017 (JD 2458000.5) 0 87.59 yr (31,992 days) 2.6758 AU 1.8568 AU 2.2663 AU 0.1807 3.41 yr (1,246 days) 339.54° 0.2889 ms / day 5.3539° 153.45° 125.55° 7.996 0.0738.171 0.027 km9.31 1.70 km9.80 km (calculated) 3.94 0.02 h3.9410 0.0007 h 0.20 (assumed)0.28 0.140.2899 0.04150.300 0.073 Tholen = SSB–V = 0.871U–B = 0.522 12.4112.89 0.41 1842 Hynek, provisional designation 1972 AA, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. The asteroid was discovered on 14 January 1972 by Czech astronomer Luboš Kohoutek at Hamburg Observatory, who named it after his father, Hynek Kohoutek. Orbit and classification Hynek is member of the Flora family. It orbits the Sun in the inner main-belt at a distance of 1.9–2.7 AU once every 3 years and 5 months (1,246 days). Its orbit has an eccentricity of 0.18 and an inclination of 5° with respect to the ecliptic. First identified as 1928 DE at Heidelberg, the asteroid's observation arc begins with its first used observation taken at Lowell Observatory in 1929, when it was identified as 1929 SO, nearly 43 years prior to its official discovery observation at Hamburg. Physical characteristics In the Tholen classification, Hynek is characterized as a common S-type asteroid. Rotation period In July 2007, the so-far best rated rotational lightcurve of Hynek was obtained from photometric observations by French amateur astronomer Pierre Antonini. Lightcurve analysis gave a well-defined rotation period of 3.9410 hours with a brightness variation of 0.17 magnitude (U=3). Diameter and albedo According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Hynek measures between 7.996 and 9.31 kilometers in diameter, and its surface has an albedo between 0.28 of 0.300. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 9.80 kilometers with an absolute magnitude of 12.41. Naming This minor planet was named after Hynek Kohoutek, the father of the discoverer, celebrating his 70th birthday. The official 1842 naming citation was published by the Minor Planet Center on 20 December 1974 (M.P.C. 3757). References 30em 2017-05-02 last obs. JPL Small-Body Database Browser: 1842 Hynek (1972 AA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001842 https://web.archive.org/web/20170315001948/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001842 dead 15 March 2017 Jet Propulsion Laboratory 8 June 2017 Dictionary of Minor Planet Names – (1842) Hynek Schmadel Lutz D. Springer Berlin Heidelberg 148 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1843 (1842) Hynek 1842 Hynek (1972 AA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1842 14 March 2017 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 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 Asteroids and comets rotation curves – (1842) Hynek Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001842 14 March 2017 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001842 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 14 March 2017 1842 14 March 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 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 14 March 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 14 March 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 Geneve, Raoul Behrend 1842 1841 Masaryk 1842 1843 Jarmila 001842 Category:Discoveries by Luboš Kohoutek Category:Named minor planets 001842 19720114