1680 Per Brahe

Asteroid October 2019 yes 1680 Per Brahe #D6D6D6 12 February 1942 L. Oterma Turku Obs. (1680) Per Brahe 1942 CH1934 PP1937 AA1937 AY1938 JA1943 PC1949 XL1952 OG1953 VD 11960 FFA902 JA Per Brahe the Younger(Count and Governor) main-belt(middle)background 27 April 2019 (JD 2458600.5) 0 117.28 yr (42,838 d) 3.2227 AU 2.2278 AU 2.7252 AU 0.1825 4.50 yr (1,643 d) 349.62° 0.2191 ms / day 4.2614° 83.344° 158.68° 13.960 0.125 km14.20 0.8 km14.848 0.130 km15.45 1.32 km18.29 0.70 km 3.426 0.002 h3.428 0.002 h 0.178 0.0150.2722 0.02230.2903 0.0380.300 0.0440.407 0.294 SMASS S 10.6511.111.2 1680 Per Brahe, provisional designation 1942 CH, is a bright background asteroid from the central region of the asteroid belt, approximately 14 km mi off 1 us in diameter. It was discovered on 12 February 1942, by Finnish astronomer Liisi Oterma at Turku Observatory in Southwest Finland. The stony S-type asteroid has a rotation period of 3.4 hours. It is named after Swedish count and governor Per Brahe the Younger. Orbit and classification The S-type asteroid is a non-family asteroid of the main belt's background population. It orbits the Sun in the central main-belt at a distance of 2.2–3.2 AU once every 4 years and 6 months (1,643 days; semi-major axis of 2.73 AU). Its orbit has an eccentricity of 0.18 and an inclination of 4° with respect to the ecliptic. Per Brahe was first identified as A902 JA at Heidelberg Observatory in 1902, extending the asteroid's observation arc by 40 years prior to its official discovery observation. Naming This minor planet was named for Swedish count Per Brahe (1602–1680), who was Governor General of Finland in the 17th century. His prosperous legacy saw the establishment of Academia Aboensis, the first university in Finland, the construction of various new towns and many schools, and the publication of the first Finnish Bible. The official 1680 naming citation was published by the Minor Planet Center on 1 April 1980 (M.P.C. 5280). Physical characteristics Lightcurve In December 2012, two rotational lightcurves of Per Brahe were obtained by American astronomers Robert Stephens and Brian Warner. They gave a well-defined rotation period of 3.426 and 3.428 hours with a brightness variation of 0.13 and 0.017 magnitude, respectively (U=3/3). Previously, lightcurves obtained by Laurent Bernasconi and René Roy in 2005 and 2006, gave a similar period of 3.444 and 3.44 hours, respectively.(U=2/1+). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Per Brahe measures between 13.96 and 18.29 kilometers in diameter, and its surface has an albedo between 0.178 and 0.300. The Collaborative Asteroid Lightcurve Link derives a higher albedo of 0.341 and a diameter of 14.36 kilometers with an absolute magnitude of 11.0. References 30em 2019-08-20 last obs. JPL Small-Body Database Browser: 1680 Per Brahe (1942 CH) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001680 Jet Propulsion Laboratory 5 November 2019 Dictionary of Minor Planet Names – (1680) Per Brahe Schmadel Lutz D. Springer Berlin Heidelberg 133 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1681 (1680) per Brahe 1680 Per Brahe (1942 CH) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1680 5 November 2019 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 23 December 2016 Asteroids and comets rotation curves – (1680) Per Brahe Behrend Raoul Geneva Observatory https://obswww.unige.ch/~behrend/page4cou.html#001680 23 December 2016 October 2026 InternetArchiveBot Asteroid 1680 Per Brahe – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1680 5 November 2019 1680 23 December 2016 E. F. Tedesco P. V. Noah M. Noah S. D. Price October 2004 IRAS Minor Planet Survey V6.0 NASA Planetary Data System 12 IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 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 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 The Astrophysical Journal Letters 759 1 5 2012ApJ...759L...8M 10.1088/2041-8205/759/1/L8 1209.5794 Robert D. Stephens Brian D. Warner April 2013 Lightcurves for 110 Lydia and 1680 Per Brahe The Minor Planet Bulletin 40 2 93–94 1052-8091 2013MPBu...40...93S 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 The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 External links Lightcurve plot of 1680 Per Brahe, Palmer Divide Observatory, B. D. Warner (2012) 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 1680 1679 Nevanlinna 1680 1681 Steinmetz 001680 Category:Discoveries by Liisi Oterma Category:Named minor planets 001680 19420212