1525 Savonlinna

Main-belt asteroid October 2019 yes 1525 Savonlinna #D6D6D6 18 September 1939 Y. Väisälä Turku Obs. (1525) Savonlinna 1939 SC1930 SE Savonlinna(Finnish town) main-belt(middle) 4 September 2017 (JD 2458000.5) 0 86.61 yr (31,635 days) 3.4104 AU 1.9885 AU 2.6995 AU 0.2634 4.44 yr (1,620 days) 235.57° 0.2222 ms / day 5.8589° 279.06° 64.806° 11.73 2.63 km12.06 km (derived)12.18 km (IRAS)12.23 3.39 km12.233 0.140 km 14.634 0.002 h22.8406 0.0296 h 0.045 0.0270.07 0.040.0840 (derived)0.09 0.100.1306 0.020 (IRAS) S 12.8012.87 0.1512.912.901 0.003 (R)13.0713.54 1525 Savonlinna (provisional designation 1939 SC) is an asteroid from the central region of the asteroid belt, approximately 12 kilometers in diameter. It was discovered on 18 September 1939, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in southwestern Finland. It was later named after the eastern Finnish town Savonlinna. Orbit and classification Savonlinna orbits the Sun in the central main-belt at a distance of 2.0–3.4 AU once every 4 years and 5 months (1,620 days). Its orbit has an eccentricity of 0.26 and an inclination of 6° with respect to the ecliptic. It was first identified as 1930 SE at Simeiz Observatory, extending the body's arc length by 9 years prior to its official discovery observation at Turku. Physical characteristics Rotational period In October and December 2010, two rotational lightcurves of Savonlinna were obtained by Gordon Gartrelle at UND and the Palomar Transient Factory in California. Lightcurve analysis gave a divergent rotation period of 14.634 and 22.8406 hours with a brightness variation of 0.52 and 0.50 magnitude, respectively (U=2/2). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Savonlinna measures between 11.73 and 12.23 kilometers in diameter and its surface has an albedo between 0.045 and 0.130. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.084 and a diameter of 12.06 kilometers based on an absolute magnitude of 12.9. It also classifies the body as a S-type asteroid, despite its derived albedo. Naming This minor planet was named for the eastern Finnish town Savonlinna, located in the heart of the Saimaa lake region. The official 1525 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3929). References 2017-04-28 last obs. JPL Small-Body Database Browser: 1525 Savonlinna (1939 SC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001525 Jet Propulsion Laboratory 5 June 2017 Dictionary of Minor Planet Names – (1525) Savonlinna Schmadel Lutz D. Springer Berlin Heidelberg 121 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1526 (1525) Savonlinna 1525 Savonlinna (1939 SC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1525 31 December 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. 2009 Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 2009dmpn.book.....S 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 1525 31 December 2016 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. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. Wright December 2015 NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 9341381 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 Gartrelle, Gordon M. April 2012 Lightcurve Results for Eleven Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39...40G The Minor Planet Bulletin 39 2 40%–46 1052-8091 2012MPBu...39...40G 31 December 2016 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 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W The Astronomical Journal 150 3 35 2015AJ....150...75W 10.1088/0004-6256/150/3/75 1504.04041 8342929 31 December 2016 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 1525 1524 Joensuu 1525 1526 Mikkeli 001525 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 19390918