1185 Nikko

Main-belt asteroid October 2019 yes 1185 Nikko #D6D6D6 17 November 1927 O. Oikawa Tokyo Astronomical Obs. (389) (1185) Nikko 1927 WC1930 SE 11930 SG 11930 SH 1 Nikkō (Japanese city) main-belt(inner) 4 September 2017 (JD 2458000.5) 0 86.78 yr (31,697 days) 2.4744 AU 2.0006 AU 2.2375 AU 0.1059 3.35 yr (1,222 days) 280.93° 0.2945 ms / day 5.7013° 71.904° 1.9614° 8.347 0.297 km11.35 km (calculated)12.56 0.83 km 3.781 0.03263.78615 0.00005 h3.788 0.0326 h3.7889 0.0004 h3.79 0.01 h3.792 0.002 h 0.164 0.0230.20 (assumed)0.370 0.041 S (Tholen)S (SMASS)SB–V = 0.923U–B = 0.514 11.674 0.002 (R)11.99 0.3312.09 1185 Nikko, provisional designation 1927 WC, is a stony asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 17 November 1927 by Okuro Oikawa at the Tokyo Astronomical Observatory, Japan. The asteroid was named after the Japanese city of Nikkō. Orbit and classification Nikko orbits the Sun in the inner main-belt 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 6° with respect to the ecliptic. Nikkos observation arc begins with its first used observation taken at Johannesburg Observatory in 1930, or 3 years after its official discovery observation at Tokyo. Physical characteristics In both the Tholen and SMASS taxonomy, Nikko is a common stony S-type asteroid. Rotation period Between 2004 and 2011, several rotational lightcurves of Nikko were obtained from photometric observations taken by astronomers Laurent Bernasconi, Hiromi and Hiroko Hamanowa, John Menke, Robert Stephens, as well as at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period between 3.781 and 3.792 hours with a brightness variation between 0.26 and 0.50 magnitude (U=3/3/3/3-/2/2). Diameter and albedo According to the survey carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Nikko measures 8.347 and 12.56 kilometers in diameter, and its surface has an albedo of 0.370 and 0.164, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 11.35 kilometers with an absolute magnitude of 12.09. Naming This minor planet was named for the Japanese city of Nikkō, located in the Tochigi Prefecture of central Japan. The tourist resort is known for its Shinto shrine and a UNESCO World Heritage Site Nikkō Tōshō-gū. The official naming citation was published by Paul Herget in The Names of the Minor Planets in 1955 (H 110). References 2017-07-01 last obs. JPL Small-Body Database Browser: 1185 Nikko (1927 WC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001185 Jet Propulsion Laboratory 26 July 2017 Dictionary of Minor Planet Names – (1185) Nikko Schmadel Lutz D. Springer Berlin Heidelberg 99 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1186 (1185) Nikko 1185 Nikko (1927 WC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1185 12 March 2017 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 12 March 2017 Asteroids and comets rotation curves – (1185) Nikko Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001185 12 March 2017 3 December 2002 https://web.archive.org/web/20021203214643/http://obswww.unige.ch/~behrend/page3cou.html#001185 dead 1185 12 March 2017 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 free (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 12 March 2017 Menke, John December 2005 Asteroid lightcurve results from Menke Observatory http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2005MPBu...32...85M The Minor Planet Bulletin 32 4 85–88 1052-8091 2005MPBu...32...85M 12 March 2017 Stephens, Robert D. June 2005 Rotational periods of 743 Eugenisis, 995 Sternberga, 1185 Nikko 2892 Filipenko, 3144 Brosche, and 3220 Murayama http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2005MPBu...32...27S The Minor Planet Bulletin 32 2 27–28 1052-8091 2005MPBu...32...27S 12 March 2017 6 Hanus, J. Durech, J. Broz, M. Warner, B. D. Pilcher, F. Stephens, R. Oey, J. Bernasconi, L. Casulli, S. Behrend, R. Polishook, D. Henych, T. Lehký, M. Yoshida, F. Ito, T. June 2011 A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011A&A...530A.134H Astronomy & Astrophysics 530 16 2011A&A...530A.134H 10.1051/0004-6361/201116738 1104.4114 12 March 2017 6 Adam Waszczak Chan-Kao Chang Eran O. Ofek Russ Laher Frank Masci David Levitan Jason Surace Yu-Chi Cheng Wing-Huen Ip Daisuke Kinoshita George Helou Thomas A. Prince Shrinivas Kulkarni September 2015 Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W The Astronomical Journal 150 3 35 2015AJ....150...75W 10.1088/0004-6256/150/3/75 1504.04041 12 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 12 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 Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1185 1184 Gaea 1185 1186 Turnera 001185 Category:Discoveries by Okuro Oikawa Category:Named minor planets 001185 001185 19271117