1523 Pieksämäki

Florian asteroid yes 1523 Pieksämäki #D6D6D6 18 January 1939 Y. Väisälä Turku Obs. (1523) Pieksamaki 1939 BC1936 FO 11936 HC1946 GB1949 AC Pieksämäki (Finnish town) main-beltFlora 4 September 2017 (JD 2458000.5) 0 80.20 yr (29,294 days) 2.4509 AU 2.0327 AU 2.2418 AU 0.0933 3.36 yr (1,226 days) 131.04° 5.1411° 327.79° 187.58° 8.98 km (calculated)9.111 0.313 km10.008 0.057 km 5.3202 0.0005 h5.3210 0.0001 h5.33 h 0.2135 0.02770.24 (assumed)0.281 0.0410.505 0.294 S 11.5612.312.412.58 0.53 1523 Pieksämäki (provisional designation 1939 BC) is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 18 January 1939, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in Southwest Finland, and named for the town of Pieksämäki. Orbit and classification This S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 2.0–2.5 AU once every 3 years and 4 months (1,226 days). Its orbit has an eccentricity of 0.09 and an inclination of 5° with respect to the ecliptic. In 1936, it was first identified as 1936 FO 1 at Nice Observatory, extending Pieksämäki's observation arc by 3 years prior to its official discovery observation at Turku. Physical characteristics Lightcurves In December 2005, American amateur astronomer Donald P. Pray obtained a rotational lightcurve at Carbuncle Hill Observatory in collaboration with other astronomers. Light-curve analysis gave a well-defined rotation period of 5.3202 hours with a brightness variation of 0.47 magnitude (U=3). Previous photometric observations were made by Kryszczyńska et al. in July 2004, that gave an identical period with an amplitude of 0.40 magnitude (U=2+), and by Claes-Ingvar Lagerkvist, who derived a period of 5.33 hours (Δ0.5 mag) already in the 1970s (U=2). In March 2013, another well-defined period of 5.3210 hours (Δ0.42 mag) was obtained by French amateur astronomer René Roy. Diameter and albedo According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Pieksämäki measures 9.111 and 10.008 kilometers in diameter, and its surface has an albedo between 0.213 and 0.505. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the family's principal body and namesake – and calculates a diameter of 8.98 kilometers based on an absolute magnitude of 12.4. Naming This minor planet was named for Pieksämäki, an eastern Finnish town in Southern Savonia. The official 1523 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3929). References 30em 2016-06-02 last obs. JPL Small-Body Database Browser: 1523 Pieksamaki (1939 BC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001523 Jet Propulsion Laboratory 5 June 2017 Dictionary of Minor Planet Names – (1523) Pieksämäki Schmadel Lutz D. Springer Berlin Heidelberg 121 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1524 (1523) Pieksämäki 1523 Pieksamaki (1939 BC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1523 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 Asteroids and comets rotation curves – (1523) Pieksämäki Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001523 31 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001523 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 16 December 2016 1523 31 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 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 31 December 2016 Lagerkvist, C. I. April 1979 A lightcurve survey of asteroids with Schmidt telescopes - Observations of nine asteroids during oppositions in 1977 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1979Icar...38..106L Icarus 38 1 106–114 1979Icar...38..106L 10.1016/0019-1035(79)90090-3 31 December 2016 6 Donald P. Pray Adrian Galad Stefan Gajdos Jozef Vilagi Walt Cooney John Gross Dirk Terrel David Higgins Marek Husarik Peter Kusnirak December 2006 Lightcurve analysis of asteroids 53, 698, 1016, 1523, 1950, 4608, 5080 6170, 7760, 8213, 11271, 14257, 15350 and 17509 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2006MPBu...33...92P The Minor Planet Bulletin 33 4 92–95 1052-8091 2006MPBu...33...92P 31 December 2016 6 A. Kryszczynska F. Colas M. Polinska R. Hirsch V. Ivanova G. Apostolovska B. Bilkina F. P. Velichko T. Kwiatkowski P. Kankiewicz F. Vachier V. Umlenski T. Michalowski A. Marciniak A. Maury K. Kaminski M. Fagas W. Dimitrov W. Borczyk K. Sobkowiak J. Lecacheux R. Behrend A. Klotz L. Bernasconi R. Crippa F. Manzini R. Poncy P. Antonini D. Oszkiewicz T. Santana-Ros October 2012 Do Slivan states exist in the Flora family?. I. Photometric survey of the Flora region http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012A&A...546A..72K Astronomy and Astrophysics 546 51 2012A&A...546A..72K 10.1051/0004-6361/201219199 31 December 2016 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 31 December 2016 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 2017-12-16 ) 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 2016-07-29 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1523 1523 1522 Kokkola 1523 1524 Joensuu 001523 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 19390118