1646 Rosseland

Main-belt asteroid October 2019 yes 1646 Rosseland #D6D6D6 19 January 1939 Y. Väisälä Turku Obs. (1646) Rosseland 1939 BG1937 QH1948 QR1955 NB1977 FK1980 ME Svein Rosseland(astrophysicist) main-belt(inner) 4 September 2017 (JD 2458000.5) 0 79.69 yr (29,105 days) 2.6435 AU 2.0771 AU 2.3603 AU 0.1200 3.63 yr (1,324 days) 320.86° 0.2718 ms / day 8.3787° 119.98° 279.82° 11.48 3.28 km11.50 2.88 km12.130 0.007 km12.801 0.231 km12.85 km (calculated)13.49 0.27 km 68.9 h69.2 h 0.18 0.100.186 0.0080.19 0.070.20 (assumed)0.202 0.0300.2253 0.0341 S 11.8211.97 0.1112.06 1646 Rosseland, provisional designation 1939 BG, is a stony asteroid from the inner regions of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 19 January 1939, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. It was later named after Norwegian astrophysicist Svein Rosseland. Orbit and classification The S-type asteroid orbits the Sun in the inner main-belt at a distance of 2.1–2.6 AU once every 3 years and 8 months (1,324 days). Its orbit has an eccentricity of 0.12 and an inclination of 8° with respect to the ecliptic. Rosseland was first observed at Johannesburg Observatory as 1937 QH, extending the body's observation arc by 2 years prior to its official discovery observation in 1939. Physical characteristics Photometry American astronomer Richard Binzel obtained the first rotational lightcurve of Rosseland in the early 1980s. It gave a rotation period of 69.2 hours with a brightness variation of 0.13 magnitude (U=2). During a survey of presumed slow rotators, photometric observations by Brazilian Cláudia Angeli and colleges gave a period of 69.2 hours and an amplitude of 0.45 magnitude (U=1). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Rosseland measures between 11.48 and 13.49 kilometers in diameter and its surface has an albedo between 0.18 and 0.2253. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 12.85 kilometers with an absolute magnitude of 11.82. Naming This minor planet was named in honor of renowned Norwegian astrophysicist Svein Rosseland (1894–1985), founder and first director of the Institute for Theoretical Astrophysics in Oslo. His work on the theory of stellar interiors included studies of stellar rotation and stability and the derivation of the Rosseland mean opacity. The lunar crater Rosseland is also named after him. The official 1646 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3932). References 2017-05-04 last obs. JPL Small-Body Database Browser: 1646 Rosseland (1939 BG) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001646 Jet Propulsion Laboratory 30 June 2017 Dictionary of Minor Planet Names – (1646) Rosseland Schmadel Lutz D. Springer Berlin Heidelberg 131 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1647 (1646) Rosseland 1646 Rosseland (1939 BG) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1646 26 December 2016 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 1646 26 December 2016 6 Fumihiko Usui Daisuke Kuroda Thomas G. Müller Sunao Hasegawa Masateru Ishiguro Takafumi Ootsubo Daisuke Ishihara Hirokazu Kataza Satoshi Takita Shinki Oyabu Munetaka Ueno Hideo Matsuhara Takashi Onaka October 2011 Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey Publications of the Astronomical Society of Japan 63 5 1117–1138 2011PASJ...63.1117U 10.1093/pasj/63.5.1117 free (online, AcuA catalog p. 153) 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 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 46350317 26 December 2016 6 C. R. Nugent A. Mainzer J. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. Wright December 2015 NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 9341381 26 December 2016 6 C. R. Nugent A. Mainzer J. Bauer R. M. Cutri E. A. Kramer T. Grav J. Masiero S. Sonnett E. L. Wright September 2016 NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos The Astronomical Journal 152 3 12 2016AJ....152...63N 10.3847/0004-6256/152/3/63 1606.08923 free R. P. Binzel J. D. Mulholland December 1983 A photoelectric lightcurve survey of small main belt asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1983Icar...56..519B Icarus 56 3 519–533 0019-1035 1983Icar...56..519B 10.1016/0019-1035(83)90170-7 26 December 2016 C. A. Angeli D. Lazzaro M. A. Florczak A. S. Betzler J. M. Carvano May 1999 A contribution to the study of asteroids with longrotational period http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1999P&SS...47..699A Planetary and Space Science 47 5 699–714 1999P&SS...47..699A 10.1016/S0032-0633(98)00122-6 26 December 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 53493339 26 December 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/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1646 1645 Waterfield 1646 1647 Menelaus 001646 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 19390119