1551 Argelander

Main-belt asteroid December 2018 yes 1551 Argelander #D6D6D6 File:001551-asteroid shape model (1551) Argelander.png Shape model of Argelander from its lightcurve Y. Väisälä Turku Observatory 24 February 1938 (1551) Argelander 1938 DC 11930 BL1940 XD1951 XG 11953 GD 11957 KR1962 XP Friedrich Argelander(German astronomer) main-belt(inner)background 27 April 2019 (JD 2458600.5) 0 88.76 yr (32,418 d) 2.5539 AU 2.2350 AU 2.3944 AU 0.0666 3.71 yr (1,353 d) 147.41° 0.2660 ms / day 3.7615° 107.23° 233.60° 9.19 0.27 km10.238 0.122 km10.50 0.50 km11.016 0.073 km 4.063 0.006 h 0.19400.2170.2220.302 S (assumed) 12.1012.20 1551 Argelander (provisional designation 1938 DC 1) is a background asteroid from the inner regions of the asteroid belt, approximately 10 km mi off 2 us in diameter. It was discovered on 24 February 1938, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in southwest Finland. The likely S-type asteroid has a rotation period of 4.1 hours. It was named after German astronomer Friedrich Argelander. Orbit and classification Argelander is a non-family asteroid from the main belt's background population. It orbits the Sun in the inner main-belt at a distance of 2.2–2.6 AU once every 3 years and 9 months (1,353 days; semi-major axis of 2.39 AU). Its orbit has an eccentricity of 0.07 and an inclination of 4° with respect to the ecliptic. The body's observation arc begins with its first observation as 1930 BL at Heidelberg Observatory in January 1930, or 8 years prior to its official discovery observation at Turku. Naming This minor planet was named after Friedrich Wilhelm Argelander (1799–1875), author of the Bonner Durchmusterung and 19th-century head of the ancient observatory at Turku and Bonn 520. The official 1551 naming citation was published by the Minor Planet Center on 30 January 1964 (M.P.C. 2278). The lunar crater Argelander is also named after him. Physical characteristics Argelander is an assumed S-type asteroid. Rotation period and poles In August 2017, a rotational lightcurve of Argelander was obtained from photometric observations at the Chilean Cerro Tololo Inter-American Observatory using the SARA South Telescope. Lightcurve analysis gave a rotation period of 4.063 0.006 hours and a brightness variation of 0.48 magnitude (U=2+). In January 2012, astronomers at the Palomar Transient Factory had also determined a period of 4.061 0.0023 with an amplitude of 0.41 magnitude (U=2). A modeled lightcurve using photometric data from the Lowell Photometric Database was published in 2016. It gave a concurring period of 4.058350 0.000001 hours, as well as two spin axes at (3.0°, −81.0°) and (183.0°, −72.0°) in ecliptic coordinates (λ, β). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Argelander measures between 9.2 and 11.0 kilometers in diameter and its surface has an albedo between 0.19 and 0.30. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a stony asteroid of 0.20 and calculates a diameter of 9.60 kilometers based on an absolute magnitude of 12.45. References 30em 2018-10-20 last obs. JPL Small-Body Database Browser: 1551 Argelander (1938 DC1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001551 Jet Propulsion Laboratory 11 December 2018 Dictionary of Minor Planet Names – (1551) Argelander Schmadel Lutz D. Springer Berlin Heidelberg 123 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1552 (1551) Argelander 1551 Argelander (1938 DC1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1551 11 December 2018 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 2009 https://cds.cern.ch/record/1339661 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 119293330 Asteroid (1551) Argelander – Proper elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?n=1551&pc=1.1.6 10 December 2018 Asteroid 1551 Argelander Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1551+Argelander 11 December 2018 https://web.archive.org/web/20181215171708/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1551+Argelander 15 December 2018 dead 1551 11 December 2018 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 (catalog) 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 46350317 6 A. K. Mainzer J. M. Bauer R. M. Cutri T. Grav E. A. Kramer J. R. Masiero C. R. Nugent S. M. Sonnett R. A. Stevenson E. L. Wright June 2016 NEOWISE Diameters and Albedos V1.0 https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_COMPIL_5_NEOWISEDIAM_V1_0/data/neowise_mainbelt.tab NASA Planetary Data System EAR-A-COMPIL-5-NEOWISEDIAM-V1.0 2016PDSS..247.....M 11 December 2018 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 (online, AcuA catalog p. 153) Michael Fauerbach Austin Brown July 2018 Lightcurve Analysis of Minor Planets 1132 Hollandia, 1184 Gaea 1322 Coppernicius, 1551 Argelander, and 3230 Vampilov The Minor Planet Bulletin 45 3 240–241 1052-8091 2018MPBu...45..240F J. Durech J. Hanus D. Oszkiewicz R. Vanco March 2016 Asteroid models from the Lowell photometric database Astronomy and Astrophysics 587 6 2016A&A...587A..48D 10.1051/0004-6361/201527573 1601.02909 118427201 6 Adam Waszczak Chan-Kao Chang Eran O. Ofek Russ Laher Frank Masci David Levitan Jason Surace Yu-Chi Cheng Wing-Huen Ip Daisuke Kinoshita George Helou Thomas A. Prince Shrinivas Kulkarni September 2015 Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry The Astronomical Journal 150 3 35 2015AJ....150...75W 10.1088/0004-6256/150/3/75 1504.04041 8342929 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 Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1551 1550 Tito 1551 1552 Bessel 001551 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 19380224