1524 Joensuu

Asteroid October 2019 yes 1524 Joensuu #D6D6D6 18 September 1939 Y. Väisälä Turku Obs. (1524) Joensuu 1939 SB1931 EL1933 QO1936 DG1958 DH 1 Joensuu (Finnish town) main-belt(outer) 4 September 2017 (JD 2458000.5) 0 85.95 yr (31,395 days) 3.4881 AU 2.7300 AU 3.1090 AU 0.1219 5.48 yr (2,002 days) 88.699° 0.1798 ms / day 12.687° 347.72° 2.7611° 39.37 12.22 km42.79 1.1 km42.83 km (derived)44.87 0.78 km45.056 0.291 km49.394 0.502 km 9.276 0.007 h 0.0347 0.00530.043 0.0020.0462 0.0020.050 0.0080.0505 (derived)0.064 0.0070.07 0.05 C 10.56 0.5010.6010.710.7810.8 1524 Joensuu (provisional designation 1939 SB) is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 42 kilometers in diameter. It was discovered on 18 September 1939, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, and named for the town of Joensuu. Classification and orbit Joensuu is a dark C-type asteroid, that orbits the Sun in the outer main-belt at a distance of 2.7–3.5 AU once every 5 years and 6 months (2,002 days). Its orbit has an eccentricity of 0.12 and an inclination of 13° with respect to the ecliptic. In 1931, Joensuu was first identified as 1931 EL at Heidelberg Observatory, extending the body's observation arc by 8 years prior to its official discovery observation. Physical characteristics In October 2005, a rotational lightcurve of Joensuu was obtained from photometric observations by French amateur astronomer Laurent Bernasconi. It gave a well-defined rotation period of 9.276 hours with a change in brightness of 0.33 magnitude (U=3). 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, Joensuu measures between 39.37 and 49.39 kilometers in diameter, and its surface has an albedo between 0.034 and 0.07. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0505 and a diameter of 42.83 kilometers using an absolute magnitude of 10.7. Naming This minor planet was named for the Finnish town Joensuu, where the discoverer received his early schooling. It is located in North Karelia, near the Russian border. The official 1524 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3929). References 2017-02-26 last obs. JPL Small-Body Database Browser: 1524 Joensuu (1939 SB) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001524 Jet Propulsion Laboratory 30 June 2017 Dictionary of Minor Planet Names – (1524) Joensuu Schmadel Lutz D. Springer Berlin Heidelberg 121 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1525 (1524) Joensuu 1524 Joensuu (1939 SB) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1524 31 December 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 2009 https://archive.org/details/dictionaryminorp2008schm limited 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 2009dmpn.book.....S Asteroids and comets rotation curves – (1524) Joensuu Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001524 31 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001524 dead 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 16 December 2016 1524 31 December 2016 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 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 31 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 31 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/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 1524 1523 Pieksämäki 1524 1525 Savonlinna 001524 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 19390918