2005 Hencke

Main-belt asteroid October 2019 yes 2005 Hencke #D6D6D6 2 September 1973 P. Wild Zimmerwald Obs. (2005) Hencke 1973 RA Karl Ludwig Hencke(German astronomer) main-beltEunomia 4 September 2017 (JD 2458000.5) 0 43.26 yr (15,802 days) 3.0590 AU 2.1826 AU 2.6208 AU 0.1672 4.24 yr (1,550 days) 91.087° 0.2323 ms / day 12.220° 291.09° 110.87° 9.369 0.174 km10.53 km (calculated) 10.186 0.006 h 0.21 (assumed)0.265 0.023 S 12.212.40 0.32 2005 Hencke, provisional designation 1973 RA, is a stony Eunomia asteroid from the middle region of the asteroid belt, approximately 10 kilometers in diameter. It was discovered by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland, on 2 September 1973. The asteroid was named after German amateur astronomer Karl Ludwig Hencke. Orbit and classification The asteroid is a member of the Eunomia family, a large group of S-type asteroids and the most prominent family in the intermediate main-belt. It orbits the Sun in the central main-belt at a distance of 2.2–3.1 AU once every 4 years and 3 months (1,550 days). Its orbit has an eccentricity of 0.17 and an inclination of 12° with respect to the ecliptic. As no precoveries were taken, the asteroid's observation arc begins with its discovery in 1973. Physical characteristics Rotation period In October 2007, a rotational lightcurve was obtained for this asteroid from photometric observations taken by U.S. astronomer James W. Brinsfield at the Via Capote Observatory in Thousand Oaks, California G69. The lightcurve gave a rotation period of 10.186 0.006 hours with a brightness amplitude of 0.08 in magnitude (U=2). Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 9.4 kilometers in diameter and its surface has an albedo of 0.27, while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21, derived from the family's largest member and namesake, 15 Eunomia, and calculates a diameter of 10.5 kilometers. Naming This minor planet was named in honor of German amateur astronomer Karl Ludwig Hencke (1793–1866), a postmaster by profession, who discovered the main-belt asteroids 5 Astraea and 6 Hebe in 1845 and 1847, respectively. The official 2005 naming citation was published by the Minor Planet Center on 15 October 1977 (M.P.C. 4238). References 30em 2017-03-29 last obs. JPL Small-Body Database Browser: 2005 Hencke (1973 RA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002005 Jet Propulsion Laboratory 10 June 2017 Dictionary of Minor Planet Names – (2005) Hencke Schmadel Lutz D. Springer Berlin Heidelberg 162 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_2006 (2005) Hencke 2005 Hencke (1973 RA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=2005 19 July 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 2005 19 July 2016 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 Brinsfield, James W. June 2008 The Rotation Periods of 531 Zerlina, 1194 Aleta 1352 Wawel, 2005 Hencke, 2648 Owa, and 3509 Sanshui http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35...86B The Minor Planet Bulletin 35 2 86–87 1052-8091 2008MPBu...35...86B 19 July 2016 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 19 July 2016 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 8 December 2016 External links 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 2004 Lexell 2005 2006 Polonskaya 002005 Hencke Category:Named minor planets 19730902