12564 Ikeller

Stony Koronian asteroid October 2019 yes 12564 Ikeller #D6D6D6 22 September 1998 W. Bickel Bergisch Gladbach Obs. (12564) Ikeller 1998 SO 491988 RA 71991 EG 51993 SK 13 Ingeborg Bickel–Keller(discoverer's wife) main-beltKoronis 4 September 2017 (JD 2458000.5) 0 27.90 yr (10,190 days) 2.9423 AU 2.7273 AU 2.8348 AU 0.0379 4.77 yr (1,743 days) 67.076° 0.2065 ms / day 1.6200° 180.04° 117.88° 5.17 km (calculated)5.369 0.259 km 7.0321 0.0196 h (R)7.0423 0.0196 h (S) 0.222 0.0490.2225 0.04950.24 (assumed) S 13.613.644 0.003 (R)14.16 0.2314.282 0.007 (S) 12564 Ikeller, provisional designation 1998 SO 49, is a stony Koronian asteroid from the outer region of the asteroid belt, approximately 5 kilometers in diameter. The asteroid was discovered by German amateur astronomer Wolf Bickel at his private Bergisch Gladbach Observatory on 22 September 1998. It was named after the discoverer's wife, Ingeborg Bickel–Keller. Orbit and classification Ikeller is a member of the Koronis family, a group of stony asteroids in the outer main-belt named after 158 Koronis. It orbits the Sun at a distance of 2.7–2.9 AU once every 4 years and 9 months (1,743 days). Its orbit has an eccentricity of 0.04 and an inclination of 2° with respect to the ecliptic. The body's observation arc begins 10 years prior to its official discovery observation, with its identification as 1988 RA 7 at ESO's La Silla Observatory in September 1988. Physical characteristics According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Ikeller measures 5.4 kilometers in diameter and its surface has an albedo of 0.22, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for Koronian asteroids of 0.24 and thus calculates a smaller diameter of 5.2 kilometers, as the higher the albedo (reflectivity), the smaller a body's diameter at a certain absolute magnitude (brightness). Lightcurve In August 2012, a photometric lightcurve of Ikeller was obtained from photometric observations by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 7.0423 hours with a brightness variation of 0.44 magnitude (U=2). Naming This minor planet was named by the discoverer after his wife, Ingeborg Bickel–Keller (born 1941). The approved naming citation was published by the Minor Planet Center on 16 January 2014 (M.P.C. 86713). References 2016-08-03 last obs. JPL Small-Body Database Browser: 12564 Ikeller (1998 SO49) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2012564 Jet Propulsion Laboratory 24 June 2017 12564 Ikeller (1998 SO49) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=12564 5 April 2016 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 17 May 2016 12564 17 May 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 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 17 May 2016 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 17 May 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 17 May 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 4 December 2016 External links Koronis Family Asteroids Rotation Lightcurve Observing Program, Stephen M. Slivan, 2013 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 (10001)-(15000) – Minor Planet Center 12564 (12563) 1998 SA43 12564 12565 Khege 012564 Category:Discoveries by Wolf Bickel Category:Named minor planets 19980922