191 Kolga

Main-belt asteroid October 2019 yes (191) Kolga #D6D6D6 191 Kolga Kólga ' k ɒ l g ə Main belt 191 Kolga.png Lightcurve-based 3D model of 191 Kolga 2.8951 AU Gm on 2.6313 AU Gm on 3.1588 AU Gm on on 4.93 yr (1799.2 d) 11.508° 0.091106 17.625 hours17.604 h d on on 9.07 0.0408 0.003 C. H. F. Peters 30 September 1878 31 July 2016 (JD 2457600.5) 159.31° 227.00° 326.28° 0.20008 ms / day 131.26 yr (47942 d) 0 94.536 0.433 km (134.3 12.8) × (78.2 1.7) km (7.24 ± 4.11/2.17)17 kg 1.637 ± 0.928/0.491 g/cm3 1.64648 AU Gm on 2.29413 AU Gm on 3.253 191 Kolga is a large, dark main-belt asteroid that was discovered by German-American astronomer C. H. F. Peters on September 30, 1878, in Clinton, New York. It is named after Kólga, the daughter of Ægir in Norse mythology. In 2009, Photometric observations of this asteroid were made at the Palmer Divide Observatory in Colorado Springs, Colorado. The resulting light curve shows a synodic rotation period of 17.625 ± 0.004 hours with a brightness variation of 0.30 ± 0.03 in magnitude. Previous independent studies produced inconsistent results that differ from this finding. References Donald K. Yeomans 191 Kolga JPL Small-Body Database Browser NASA Jet Propulsion Laboratory https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=191 6 May 2016 . Lutz D. Schmadel Dictionary of Minor Planet Names Springer 30 6th 2012 978-3642297182 . https://cds.cern.ch/record/1339660/files/978-3-540-29925-7_BookTOC.pdf Brian D. Warner Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2009 March–June The Minor Planet Bulletin 36 4 172–176 October 2009 10.1016/j.pss.2012.03.009 2009MPBu...36..172W . 1203.4336 http://www.asteroidoccultation.com/observations/Results/Data2018/20180209_KolgaProfileAligned.gif Stellar occultation from 191 Kolga (preliminary analysis) P. Maley T. George J. Bardecker T. Blank D. Dunham D. Kenyon J. Gout M. Collins B. Gimple W. Thomas J. Bean R. Sumner M. Collins 9 February 2018 3 October 2018 https://web.archive.org/web/20181004104029/http://www.asteroidoccultation.com/observations/Results/Data2018/20180209_KolgaProfileAligned.gif 4 October 2018 dead Fienga A. Avdellidou C. Hanuš J. February 2020 Asteroid masses obtained with INPOP planetary ephemerides https://hal.science/hal-02458388/file/stz3407.pdf Monthly Notices of the Royal Astronomical Society 492 1 10.1093/mnras/stz3407 free External links Lightcurve plot of 191 Kolga, Palmer Divide Observatory, B. D. Warner (2009) Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20110721225144/http://www.minorplanet.info/lightcurvedatabase.html 21 July 2011 ) 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 191 190 Ismene 191 192 Nausikaa Category:Background asteroids Kolga Kolga Category:XC:-type asteroids (Tholen) Category:Cb-type asteroids (SMASS) 18780930