16525 Shumarinaiko

Main-belt asteroid binary yes 16525 Shumarinaiko #D6D6D6 K. EndateK. Watanabe Kitami Obs. 14 February 1991 (16525) Shumarinaiko 1991 CU 21996 TE 51 Lake Shumarinai(Japanese lake) main-belt(inner)Nysa–Polana complex 4 September 2017 (JD 2458000.5) 0 67.29 yr (24,578 days) 2.7341 AU 2.0648 AU 2.3995 AU 0.1395 3.72 yr (1,358 days) 30.750° 0.2652 ms / day 2.4279° 7.6547° 180.19° 1 (D: 0.83 km; P: 14.409 h)lightcurve-plot 5.253 0.146 km5.66 km (calculated) 2.5932 0.0003 h2.6425 0.0006 h (poor)8.8 0.3 h (poor) 0.20 (assumed)0.306 0.033 S (assumed) 13.313.614.37 0.56 16525 Shumarinaiko (provisional designation 1991 CU 2) is a binary asteroid in the inner region of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 14 February 1991, by Japanese astronomers Kin Endate and Kazuro Watanabe at the Kitami Observatory on the island of Hokkaidō in northern Japan. The asteroid was named after the Japanese Lake Shumarinai. Its sub-kilometer sized minor-planet moon was discovered in 2013. Orbit and classification Shumarinaiko is a member of the Nysa–Polana complex, a collection of overlapping asteroid families in the inner main asteroid belt near the Kirkwood gap (3:1 orbital resonance with Jupiter), a depleted zone that separates the central main belt. It orbits the Sun at a distance of 2.1–2.7 AU once every 3 years and 9 months (1,358 days). Its orbit has an eccentricity of 0.14 and an inclination of 2° with respect to the ecliptic. The body's observation arc begins with a precovery from the Digitized Sky Survey. It was taken at Palomar Observatory in March 1950, almost 41 years prior to the asteroid's official discovery observation at Kitami in 1991. Physical characteristics Shumarinaiko is an assumed stony S-type asteroid. Rotation period In January 2013, a rotational lightcurve of Shumarinaiko was obtained from photometric observations by Brian Warner at the Palmer Divide Observatory (716) in Colorado, and Dan Coley at DanHenge Observatory (U80) in California. Analysis of the bimodal lightcurve gave a well-defined rotation period of 2.5932 hours with a brightness amplitude of 0.08 magnitude (U=3),lightcurve-plot superseding the results from previous observations that gave a period of 2.6425 and 8.8 hours, respectively (U=1/1). A low brightness amplitude typically indicates that the body is rather spherical in shape. Moon During the photometric observation by Warner and Coley in January 2013 (see above), mutual occultation and eclipsing events revealed that Shumarinaiko is a synchronous binary asteroid with an elongated minor-planet moon in orbit. The satellite, provisionally designated S/2013 (16525) 1, seems to be tidally locked to its orbital period of 14.409 hours. It measures least 16% of its primary (Ds/Dp of <0.16 0.02),lightcurve-plot which translates into a diameter of approximately 830 meters. There are more than 100 binary asteroids known to exist in the asteroid belt. Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Shumarinaiko measures 5.253 kilometers in diameter and its surface has an albedo of 0.306, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 5.66 kilometers based on an absolute magnitude of 13.6. Naming This minor planet was named after Lake Shumarinai. The lake is located within the Shumarinai Prefectural Natural Park in northern Hokkaidō, Japan. Artificially created to generate hydroelectricity in the 1940s, it is now known for its scenery. The official naming citation was published by the Minor Planet Center on 15 December 2005 (M.P.C. 55722). Notes lightcurve-plot Brian D. Warner (2013) Lightcurve plot of 16525 Shumarinaiko, Palmer Divide Observatory: rotation period of 2.5932 0.0003 hours with a brightness amplitude of 0.08 0.01 mag. Quality code of 3. Secondary plot with an orbital period of 14.409 0.005 hours. Summary figures for (16525) Shumarinaiko at LCDB References 30em 2017-07-05 last obs. JPL Small-Body Database Browser: 16525 Shumarinaiko (1991 CU2) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2016525 Jet Propulsion Laboratory 27 October 2017 Schmadel Lutz D. Dictionary of Minor Planet Names (16525) Shumarinaiko [2.40, 0.14, 2.4] Springer Berlin Heidelberg 101 2006 978-3-540-34361-5 10.1007/978-3-540-34361-5_1054 16525 Shumarinaiko (1991 CU2) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=16525 27 October 2017 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 27 October 2017 Asteroids and comets rotation curves – (16525) Shumarinaiko Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page5cou.html#016525 27 October 2017 11 November 2018 https://web.archive.org/web/20181111134209/http://obswww.unige.ch/~behrend/page5cou.html#016525 dead 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 27 October 2017 Asteroid 16525 Shumarinaiko – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=16525+Shumarinaiko#Asteroid%2016525%20ShumarinaikoEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 27 October 2019 https://web.archive.org/web/20200804221759/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=16525+Shumarinaiko#Asteroid%2016525%20ShumarinaikoEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 4 August 2020 dead D. Nesvorný M. Broz V. Carruba December 2014 Identification and Dynamical Properties of Asteroid Families Asteroids IV 297–321 2015aste.book..297N 10.2458/azu_uapress_9780816532131-ch016 1502.01628 978-0-8165-3213-1 Asteroids with Satellites Database – (16525) Shumarinaiko Johnston Robert Johnston's Archive 21 September 2014 http://www.johnstonsarchive.net/astro/astmoons/am-16525.html 27 October 2017 16525 27 October 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 Higgins, David January 2011 Period Determination of Asteroid Targets Observed at Hunters Hill Observatory: May 2009 - September 2010 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38...41H The Minor Planet Bulletin 38 1 41–46 1052-8091 2011MPBu...38...41H 27 October 2017 Brian D. Warner Daniel Coley July 2013 16525 Shumarinaiko: A New Nysa Binary http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013MPBu...40..124W The Minor Planet Bulletin 40 3 124–125 1052-8091 2013MPBu...40..124W 27 October 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 27 October 2017 External links Asteroids with Satellites, Robert Johnston, johnstonsarchive.net Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 2017-12-16 ) Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR https://web.archive.org/web/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 2024-12-08 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 16524 Hausmann 16525 016525 Category:Discoveries by Kin Endate Category:Discoveries by Kazuro Watanabe Category:Named minor planets 016525 19910214