1806 Derice

Stony main-belt asteroid October 2019 yes 1806 Derice #D6D6D6 13 June 1971 Perth Obs. (Bickley) (1806) Derice 1971 LC1927 EB1942 TD1949 YD1967 EB Derice Harwood(wife of astronomer) main-beltFlora 4 September 2017 (JD 2458000.5) 0 67.44 yr (24,634 days) 2.4750 AU 1.9990 AU 2.2370 AU 0.1064 3.35 yr (1,222 days) 74.051° 0.2946 ms / day 3.8406° 271.10° 193.78° 7.976 0.75910.14 0.41 km10.697 0.061 km10.7 km (derived) 3.22352 0.00004 hPravec-2009-20123.2236 0.0005 hPravec-2009-20123.2237 0.0001 hPravec-2009-20123.2240 0.0005 h3.4602 0.0007 h 0.035 0.1490.21490.2474 0.06690.282 0.025 S 11.65 0.06 (R)Pravec-2009-201212.0012.112.14 0.078 1806 Derice, provisional designation 1971 LC, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. Discovered on 13 June 1971, at the Bickley site of the Perth Observatory in Western Australia, it was the first discovery of a minor planet ever made in Oceania. The asteroid was named after the wife of Dennis Harwood, staff member at Bickley. Classification and orbit The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 2.0–2.5 AU once every 3 years and 4 months (1,222 days). Its orbit has an eccentricity of 0.11 and an inclination of 4° with respect to the ecliptic. The first used precovery was taken at Palomar Observatory in 1949, extending the asteroid's observation arc by 22 years prior to its official discovery at Bickley. The first unused observation dates back to 1927, at Tokyo Observatory. Physical characteristics Lightcurves A large number of rotational lightcurves for this asteroid were obtained from several photometric observations. The first observations were made by Italian astronomer Silvano Casulli in November 2006, and gave a rotation period 3.4602 0.0007 hours with a brightness amplitude of 0.19 in magnitude (U=3). One month later, in December 2006, observations at the Carbuncle Hill Observatory gave a period of 3.2240 0.0005 hours with an identical amplitude of 0.19 in magnitude (U=3). Between November 2009 and December 2012, Czech astronomer Petr Pravec at Ondřejov Observatory obtained three more lightcurves with periods between 3.2235 and 3.2237 hours and corresponding amplitudes of 0.07. 0.10 and 0.10, respectively (U=3/3/3).Pravec-2009-2012 Diameter and albedo According to the space-based surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures between 8.0 and 10.7 kilometers in diameter, respectively, and its surface has an albedo between 0.035 and 0.282. Astronomer Petr Pravec and the Collaborative Asteroid Lightcurve Link derive an albedo of 0.21 and a diameter of 10.7 kilometers with an absolute magnitude of 12.4. Naming This minor planet was named after Derice Harwood, wife of Dennis Harwood, astrometric staff member of the discovering Perth Observatory. The official naming citation was published by the Minor Planet Center on 11 December 1981 (M.P.C. 6530). Notes Pravec-2009-2012 Pravec, P.; Wolf, M.; Sarounova, L. (2009, 2011 and 2012) web publication. Summary figures listed at the Light Curve Data Base-(1806) Derice References 30em 2017-05-06 last obs. JPL Small-Body Database Browser: 1806 Derice (1971 LC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001806 https://web.archive.org/web/20200918050741/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001806 dead 18 September 2020 Jet Propulsion Laboratory 3 June 2017 Dictionary of Minor Planet Names – (1806) Derice Schmadel Lutz D. Springer Berlin Heidelberg 145 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1807 (1806) Derice 1806 Derice (1971 LC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1806 16 May 2016 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 16 May 2016 Asteroids and comets rotation curves – (1806) Derice Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001806 16 May 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001806 dead 1806 16 May 2016 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 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 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M The Astrophysical Journal 741 2 25 2011ApJ...741...90M 10.1088/0004-637X/741/2/90 1109.6407 16 May 2016 Pravec, Petr Harris, Alan W. Kusnirák, Peter Galád, Adrián Hornoch, Kamil September 2012 Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P Icarus 221 1 365–387 2012Icar..221..365P 10.1016/j.icarus.2012.07.026 4 November 2015 Pray, Donald P. Galad, Adrian Husarik, Marek Oey, Julian March 2008 Lightcurve Analysis of Fourteen Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35...34P The Minor Planet Bulletin 35 1 34–36 1052-8091 2008MPBu...35...34P 4 November 2015 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 8 December 2016 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 1806 1805 Dirikis 1806 1807 Slovakia 001806 001806 Category:Named minor planets 19710613