2004 Lexell

Florian asteroid October 2019 yes 2004 Lexell #D6D6D6 22 September 1973 N. Chernykh Crimean Astrophysical Obs. (2004) Lexell 1973 SV 21938 WL1941 SN 11959 GC1972 HK Anders Johan Lexell(Swedish-Russian astronomer) main-beltFlora 4 September 2017 (JD 2458000.5) 0 78.55 yr (28,689 days) 2.3451 AU 1.9986 AU 2.1718 AU 0.0798 3.20 yr (1,169 days) 215.94° 0.3079 ms / day 2.4967° 4.5440° 58.504° 7.255 0.216 km7.456 0.084 km7.82 km (calculated)14.7 km 5.44 0.02 h5.441 0.002 h5.4429 0.0003 h 0.0560.24 (assumed)0.2908 0.05220.306 0.041 LSS 12.612.712.908 0.06413.04 0.00 2004 Lexell, provisional designation 1973 SV 2, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 7.5 kilometers in diameter. The asteroid was discovered on 22 September 1973, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula, and later named for Swedish-Russian astronomer and mathematician Anders Johan Lexell. Classification and orbit Lexell is a member of the Flora family, one of the largest collisional populations of stony asteroids. It orbits the Sun at a distance of 2.0–2.3 AU once every 3 years and 2 months (1,169 days). Its orbit has an eccentricity of 0.08 and an inclination of 2° with respect to the ecliptic. The asteroid was first identified as 1938 WL at the Finnish Turku Observatory in November 1938, extending the body's observation arc by 35 years prior to its official discovery observation at Nauchnij. Physical characteristics Pan-STARRS photometric survey characterized Lexell as a LS-type asteroid, which transitions between the common S-type and rare L-type asteroid. Rotation period In March 2013, two rotational lightcurves of Lexell were obtained from photometric observations by Gary Haagen at Stonegate Observatory, Massachusetts, and by a group of astronomers at the Oakley Southern Sky Observatory (E09), Australia. Lightcurve analysis gave a well-defined rotation period of 5.441 and 5.4429 hours with a brightness variation of 0.45 and 0.42 magnitude, respectively (U=3/3). In February 2013, observations made by French amateur astronomer Pierre Antonini gave a concurring period of 5.44 hours with an amplitude of 0.51 magnitude (U=3-). Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Lexell measures 7.255 and 7.456 kilometers in diameter and its surface has an albedo of 0.306 and 0.2908, respectively. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of the Flora family – and calculates a diameter of 7.82 kilometers based on an absolute magnitude of 12.7. Naming This minor planet was named after Anders Johan Lexell (1740–1784), a Swedish-Russian astronomer and mathematician. The official 2004 naming citation was published by the Minor Planet Center on 15 October 1977 (M.P.C. 4238). The lunar crater Lexell was also named in his honor, as is Lexell's Comet, of which he computed its orbit. References 30em 2017-06-03 last obs. JPL Small-Body Database Browser: 2004 Lexell (1973 SV2) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002004 Jet Propulsion Laboratory 29 June 2017 Dictionary of Minor Planet Names – (2004) Lexell Schmadel Lutz D. Springer Berlin Heidelberg 162 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_2005 (2004) Lexell 2004 Lexell (1973 SV2) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=2004 29 June 2017 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 Asteroids and comets rotation curves – (2004) Lexell Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#002004 29 June 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#002004 dead 6 Joseph R. Masiero T. Grav A. K. Mainzer C. R. Nugent J. M. Bauer R. Stevenson S. Sonnett August 2014 Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 29 June 2017 2004 29 June 2017 Vander Haagen, Gary A. October 2010 Lightcurve and H-G Parameters for 2004 Lexell http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37..137V The Minor Planet Bulletin 37 4 137–138 1052-8091 2010MPBu...37..137V 29 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 6 Kenda Albers Katherine Kragh Adam Monnier Zachary Pligge Kellen Stolze Josh West Arnold Yim Richard Ditteon October 2010 Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2009 October thru 2010 April http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37..152A The Minor Planet Bulletin 37 4 152–158 1052-8091 2010MPBu...37..152A 29 June 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 29 June 2017 External links 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 2004 2003 Harding 2004 2005 Hencke 002004 Category:Discoveries by Nikolai Chernykh Category:Named minor planets 19730922