10645 Brač

Asteroid October 2019 yes 10645 Brač #D6D6D6 14 March 1999 K. Korlević Višnjan Obs. (10645) Brač 1999 ES 41962 TN1968 BF1975 TJ 11980 YK1986 EH 51988 SX 4 Brač (Croatian island) main-beltEunomia 4 September 2017 (JD 2458000.5) 0 54.67 yr (19,968 days) 3.1430 AU 2.1725 AU 2.6578 AU 0.1826 4.33 yr (1,583 days) 224.98° 0.2275 ms / day 12.520° 351.57° 44.961° 9.60 km (calculated)10.26 0.11 km 2.785 0.005 h2.78592 0.00003 h 0.202 0.0380.21 (assumed) SLS 12.512.412.312.41 0.50 10645 Brač, provisional designation 1999 ES 4, is a stony Eunomia asteroid from the central region of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 14 March 1999, by Croatian astronomer Korado Korlević at Višnjan Observatory, and named after the Croatian island of Brač. Classification and orbit 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 at a distance of 2.2–3.1 AU once every 4 years and 4 months (1,583 days). Its orbit has an eccentricity of 0.18 and an inclination of 13° with respect to the ecliptic. The first precovery was taken at the U.S. Goethe Link Observatory in 1962, extending the asteroid's observation arc by 37 years prior to discovery. Physical characteristics In October 2014, photometric observations by Italian astronomer Silvano Casulli gave a rotational lightcurve with a period of 2.78592 0.00003 hours and a brightness amplitude of 0.31 in magnitude (U=3-). Three weeks later, a second lightcurve was obtained at the U.S. Etscorn Campus Observatory in New Mexico, rendering a concurring period of 2.785 0.005 with an identical variation in brightness (U=3-). According to the survey carried out by NASA's space-based Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 10.3 kilometers in diameter and its surface has an albedo of 0.202 0.038, while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 and calculates a diameter of 9.6 kilometers. A large-scale survey by Pan-STARRS (PS1) assigns an LS-type, an intermediary spectral type between the common, stony S-types and the rather rare and reddish L-type asteroids. Naming This minor planet was named after the Croatian island of Brač, the largest Dalmatian island in the Adriatic Sea, and the place where the Blaca hermitage Observatory is located. The approved naming citation was published by the Minor Planet Center on 15 December 2005 (M.P.C. 55720). References 2017-06-05 last obs. JPL Small-Body Database Browser: 10645 Brac (1999 ES4) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2010645 Jet Propulsion Laboratory 5 July 2017 Dictionary of Minor Planet Names – (10645) Brač, Addendum to Fifth Edition: 2003–2005 Schmadel Lutz D. Springer Berlin Heidelberg 55 2006 978-3-540-34360-8 10.1007/978-3-540-34361-5_477 (10645) Brač [2.66, 0.18, 12.5] 10645 Brac (1999 ES4) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=10645 12 April 2016 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 17 May 2016 Asteroids and comets rotation curves – (10645) Brac Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page5cou.html#010645 17 May 2016 https://web.archive.org/web/20181111134209/http://obswww.unige.ch/~behrend/page5cou.html#010645 11 November 2018 dead 10645 17 May 2016 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 17 May 2016 Daniel A. Klinglesmith Austin DeHart Jesse Hanowell Sebastian Hendrickx April 2015 Asteroids at Etscorn Campus Observatory: 2014 September - December http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015MPBu...42..101K The Minor Planet Bulletin 42 2 101–104 1052-8091 2015MPBu...42..101K 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 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 (10001)-(15000) – Minor Planet Center 10645 10645 10646 Machielalberts 010645 Category:Discoveries by Korado Korlević Category:Named minor planets 19990314