1477 Bonsdorffia

Main-belt asteroid October 2019 yes 1477 Bonsdorffia #D6D6D6 Y. Väisälä Turku Obs. 6 February 1938 (1477) Bonsdorffia 1938 CC1959 WD Ilmari Bonsdorff(Finnish astronomer) main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 63.72 yr (23,274 days) 4.0797 AU 2.3192 AU 3.1994 AU 0.2751 5.72 yr (2,090 days) 69.903° 0.1722 ms / day 15.713° 320.65° 103.38° 25.85 0.39 km28.10 1.3 km29.13 8.63 km35.87 0.66 km 7.5 hDurkee-20117.8 0.1 hAznar-2011 0.033 0.0010.043 0.0190.0517 0.0050.06 0.05 Tholen XUB–V 0.733 11.09 0.3011.3911.5911.97 1477 Bonsdorffia, provisional designation 1938 CC, is a background asteroid from the outer regions of the asteroid belt, approximately 29 kilometers in diameter. It was discovered on 6 February 1938, by astronomer Yrjö Väisälä at the Iso-Heikkilä Observatory in Turku, Finland. The asteroid was named after Finnish astronomer Ilmari Bonsdorff, who founded the Finnish Geodetic Institute. Orbit and classification Bonsdorffia is a non-family asteroid of the main belt's background population. It orbits the Sun in the outer main-belt at a distance of 2.3–4.1 AU once every 5 years and 9 months (2,090 days). Its orbit has an eccentricity of 0.28 and an inclination of 16° with respect to the ecliptic. The body's observation arc begins 11 days prior to its official discovery observation at Turku. Physical characteristics In the Tholen classification, Bonsdorffia is an X-type asteroid with an unusual spectrum (XU). Rotation period In December 2010, a rotational lightcurve of Bonsdorffia was obtained from photometric observations by astronomer Amadeo Aznar at his Puzol Observatory in Spain (J42). Lightcurve analysis gave a rotation period of 7.8 hours with a brightness amplitude of 0.32 magnitude (U=2).Aznar-2011 Another lightcurve by Richard Durkee at the SOS Observatory (H39) gave a similar period of 7.5 hours (U=1).Durkee-2011 Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Bonsdorffia measures between 25.85 and 35.87 kilometers in diameter and its surface has an albedo between 0.033 and 0.06. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0517 and a diameter of 28.10 kilometers based on an absolute magnitude of 11.59. Naming This minor planet was named after Ilmari Bonsdorff (1879–1950), Finnish astronomer and founder and director of the Finnish Geodetic Institute. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 132). Notes Durkee-2011 Durkee (2011) web: rotation period 7.5 hours with a brightness amplitude of 0.01 mag. Summary figures for (1477) Bonsdorffia at LCDB and SOS Observatory website (archived) Aznar-2011 Aznar (2011) web: rotation period 7.8 0.1 hours with a brightness amplitude of 0.32 mag. Summary figures for (1477) Bonsdorffia at LCDB and Aznar's website (archived) References 30em 2017-05-06 last obs. JPL Small-Body Database Browser: 1477 Bonsdorffia (1938 CC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001477 Jet Propulsion Laboratory 20 October 2017 Dictionary of Minor Planet Names – (1477) Bonsdorffia Schmadel Lutz D. Springer Berlin Heidelberg 118 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1478 (1477) Bonsdorffia 1477 Bonsdorffia (1938 CC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1477 20 October 2017 Asteroid 1477 Bonsdorffia – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1477 29 October 2019 1477 20 October 2017 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 20 October 2017 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 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) E. F. Tedesco P. V. Noah M. Noah S. D. Price October 2004 IRAS Minor Planet Survey V6.0 https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab NASA Planetary Data System 12 IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 22 October 2019 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 20 October 2017 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/20160729213840/http://obswww.unige.ch/~behrend/page_cou.html 29 July 2016 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1477 1476 Cox 1477 1478 Vihuri 001477 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 001477 19380206