1651 Behrens

Asteroid October 2019 yes 1651 Behrens #D6D6D6 23 April 1936 M. Laugier Nice Obs. (1651) Behrens 1936 HD1939 EJ1940 QD1944 YA1947 WA1950 TB 41952 FF1952 HB1952 KG1958 BC1961 AB1963 UQ Johann Behrens(pastor, astronomer) main-beltFlora 4 September 2017 (JD 2458000.5) 0 81.03 yr (29,597 days) 2.3237 AU 2.0354 AU 2.1796 AU 0.0661 3.22 yr (1,175 days) 147.98° 0.3063 ms / day 5.0752° 187.51° 339.10° 8.963 0.1139.264 0.080 km10.25 2.24 km10.31 km (calculated)10.33 2.35 km 34.34 0.10 h 0.20 0.140.24 (assumed)0.26 0.070.3003 0.02640.318 0.052 S 12.112.17 0.2012.56 1651 Behrens, provisional designation 1936 HD, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. Discovered by Marguerite Laugier in 1936, it was named after Johann Behrens. Discovery Behrens was discovered on 23 April 1936, by French astronomer Marguerite Laugier at Nice Observatory in southeastern France. It was independently discovered by Karl Reinmuth at Heidelberg Observatory, Germany in the following month. Classification and orbit Behrens is an S-type asteroid and member of the Flora family, a large group of stony asteroids in the inner main-belt. It orbits the Sun at a distance of 2.0–2.3 AU once every 3 years and 3 months (1,175 days). Its orbit has an eccentricity of 0.07 and an inclination of 5° with respect to the ecliptic. As no precoveries were taken, and no prior identifications were made, the body's observation arc begins with its official discovery observation. Physical characteristics Rotation period Astronomers Laurent Bernasconi and Stéphane Charbonnel obtained a rotational lightcurve of Behrens from photometric observations made in August 2001. It gave a longer than average rotation period of 34.34 hours with a brightness variation of 0.16 magnitude (U=2). Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Behrens measures between 8.96 and 10.33 kilometers in diameter, and its surface has an albedo between 0.20 and 0.318. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of this orbital family – and calculates a diameter of 10.31 kilometers with an absolute magnitude of 12.1. Naming Based on a proposal by Otto Kippes, who verified the discovery, this minor planet was named after Johann Gerhard Behrens (1889–1978), German amateur astronomer and pastor at Detern, in lower Saxony. He was known for his orbit computations on comets and minor planets. The official naming citation was published by the Minor Planet Center on 1 October 1980 (M.P.C. 5523). References 30em 2017-05-05 last obs. JPL Small-Body Database Browser: 1651 Behrens (1936 HD) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001651 Jet Propulsion Laboratory 6 June 2017 Dictionary of Minor Planet Names – (1651) Behrens Schmadel Lutz D. Springer Berlin Heidelberg 131 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1652 (1651) Behrens 1651 Behrens (1936 HD) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1651 25 December 2016 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 25 December 2016 Asteroids and comets rotation curves – (1651) Behrens Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001651 25 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001651 dead 1651 25 December 2016 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 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 25 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 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 25 December 2016 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 119293330 25 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 1651 1650 Heckmann 1651 1652 Hergé 001651 Category:Discoveries by Marguerite Laugier Category:Named minor planets 19360423