1858 Lobachevskij

Rare-type main-belt asteroid Lobachevsky (disambiguation) October 2019 yes 1858 Lobachevskij #D6D6D6 001858-asteroid shape model (1858) Lobachevskij.png Lobachevskij modeled from its lightcurve 18 August 1972 L. Zhuravleva Crimean Astrophysical Obs. (1858) Lobachevskij 1972 QL1928 SG1936 MH1955 VW1957 BM1964 YC Nikolai Lobachevsky(Russian mathematician) main-belt(middle) 4 September 2017 (JD 2458000.5) 0 80.42 yr (29,372 days) 2.9086 AU 2.4897 AU 2.6992 AU 0.0776 4.43 yr (1,620 days) 98.237° 0.2223 ms / day 1.6607° 271.91° 17.726° 10.769 0.18910.919 0.116 km13.06 km (calculated) 5.409 0.0115 h (S)5.413 0.003 h5.4141 0.0115 h (R)5.435 0.003 h7.00 0.01 h (dated) 0.18 (assumed)0.3737 0.05900.383 0.055 SMASS = L 11.511.911.905 0.002 (R)12.012.368 0.002 (S) 1858 Lobachevskij (prov. designation: 1972 QL) is a rare-type background asteroid from the central region of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 18 August 1972, by Soviet astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula. The asteroid was named after Russian mathematician Nikolai Lobachevsky. Orbit and classification Lobachevskij had already been photographed in precovery images dating back to the 1930s, providing it with a much larger observation arc. It orbits the Sun in the central main-belt at a distance of 2.5–2.9 AU once every 4 years and 5 months (1,620 days). Its orbit has an eccentricity of 0.08 and an inclination of 2° with respect to the ecliptic. First observed as 1928 SG at Heidelberg Observatory in 1928, the asteroid's first used observations was a precovery taken at Palomar Observatory in 1954, extending its observation arc by 18 years prior to its official discovery at Nauchnyj. Naming This minor planet was named in honor of mathematician Nikolai Lobachevsky (1792–1856), Russian mathematician and creator of the first comprehensive system of non-Euclidean geometry. The official 1858 naming citation was published by the Minor Planet Center on 1 June 1975 (M.P.C. 3826). Physical characteristics Lobachevskij is a strongly reddish and relatively uncommon L-type asteroid in the SMASS classification. It has an absolute magnitude between 11.5 and 12.4. Lightcurves In May 2011, photometric observation of Lobachevskij gave a rotation period of 5.413 and 5.435 hours with a brightness amplitude of 0.30 and 0.33 magnitude, respectively (U=2+/2), superseding a previous period of 7.00 hours (U=2). In September 2012, two rotational lightcurves were obtained in the S- and R-band at the Palomar Transient Factory in California. Lightcurve analysis gave a period of 5.409 and 5.4141 hours with an amplitude of 0.26 and 0.22 magnitude, respectively (U=2/2). Occultation Lobachevskij covered a 10.4 mag star—a phenomenon known as occultation—in the constellation Sagittarius in June 2007. It was predicted that the event could be seen in the northeastern United States and southeast Canada. The combined light magnitude of the bodies would drop momentarily—for a maximum of 2.2 seconds.http://www.asteroidoccultation.com/2007_06/0615_1858_10446_Summary.txt IOTA/IOTA-ES occultation update for (1858) Lobachevskij / TYC 6295-00008-1 event on 2007 Jun 15, 04:51 UT 2008-03-08 https://archive.today/20070515125850/http://www.asteroidoccultation.com/2007_06/0615_1858_10446_Summary.txt 2007-05-15 Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Lobachevskij measures between 10.769 and 10.919 kilometers in diameter, and its surface has an albedo between 0.3737 and 0.383, respectively, while the Collaborative Asteroid Lightcurve Link assumes a lower albedo of 0.18 and calculates a diameter of 12.47 kilometers with an absolute magnitude of 12.0. References 30em 2016-11-23 last obs. JPL Small-Body Database Browser: 1858 Lobachevskij (1972 QL) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001858 Jet Propulsion Laboratory 8 June 2017 Dictionary of Minor Planet Names – (1858) Lobachevskij Schmadel Lutz D. Springer Berlin Heidelberg 149 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1859 (1858) Lobachevskij 1858 Lobachevskij (1972 QL) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1858 29 March 2017 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. 2009 Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 2009dmpn.book.....S 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 118745497 29 March 2017 1858 9 June 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 35447010 Ditteon, R. Bixby, A. R. Sarros, A. M. Waters, C. T. December 2002 Rotation Periods and Lightcurves of 1858 Lobachevskij, 2384 Schulhof and (5515) 1989 EL1 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MPBu...29...69D The Minor Planet Bulletin 29 69 2002MPBu...29...69D 22 August 2016 Ditteon, Richard Horn, Lauren Kamperman, Amy Vorjohan, Bradley Kirkpatrick, Elaine January 2012 Asteroid Lightcurve Analysis at the Oakley Souther Sky Observatory: 2011 April–May http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39...26D The Minor Planet Bulletin 39 1 26–28 1052-8091 2012MPBu...39...26D 22 August 2016 6 Waszczak, Adam Chang, Chan-Kao Ofek, Eran O. Laher, Russ Masci, Frank Levitan, David Surace, Jason Cheng, Yu-Chi Ip, Wing-Huen Kinoshita, Daisuke Helou, George Prince, Thomas A. Kulkarni, Shrinivas 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 8342929 22 August 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 (1)-(5000) – Minor Planet Center 1858 1857 Parchomenko 1858 1859 Kovalevskaya 001858 Category:Discoveries by Lyudmila Zhuravleva Category:Named minor planets 001858 19720818