1573 Väisälä

Asteroid October 2019 yes 1573 Väisälä #D6D6D6 27 October 1949 S. Arend Uccle Obs. (1573) Väisälä 1949 UA Yrjö Väisälä (astronomer) main-beltPhocaea 4 September 2017 (JD 2458000.5) 0 67.51 yr (24,659 days) 2.9192 AU 1.8243 AU 2.3717 AU 0.2308 3.65 yr (1,334 days) 225.00° 0.2698 ms / day 24.553° 202.38° 173.91° 8.43 1.90 km9.083 0.055 km9.146 0.066 km9.77 km (IRAS:2) 252 hLCDB-Pravec-2012 0.2226 (IRAS:2)0.25 0.120.2818 0.03190.284 0.045 S 12.212.3012.4712.84 0.50 1573 Väisälä, provisional designation 1949 UA, is a stony Phocaea asteroid, slow rotator and suspected tumbler from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 27 October 1949, by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle, Belgium. It was named for Finnish astronomer Yrjö Väisälä. Orbit and classification The stony S-type asteroid is a member of the Phocaea family (701), a group of asteroids with similar orbital characteristics. It orbits the Sun at a distance of 1.8–2.9 AU once every 3 years and 8 months (1,334 days). Its orbit has an eccentricity of 0.23 and an inclination of 25° with respect to the ecliptic. Väisäläs observation arc begins on the night following its official discovery observation at Uccle, as no precoveries were taken and no prior identifications were made. Physical characteristics Slow rotator In September 2011, a rotational lightcurve of Väisälä was obtained from photometric observations made by Czech astronomer Petr Pravec at Ondřejov Observatory.IMG-Light-Curve-Analysis Its analysis gave a rotation period of 252 hours with a brightness variation of 0.76 magnitude (U=2).LCDB-Pravec-2012 This makes Väisälä one of the Top 200 slow rotators known to exist. The body is also suspected to be in a non-principal axis rotation (NPAR), colloquially called as "tumbling". As of 2017, no follow-up observations have been made of these provisional results. Diameter and albedo According to the space-based surveys carried out by the Infrared Astronomical Satellite IRAS, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Väisälä measures between 8.43 and 9.77 kilometers in diameter, and its surface has an albedo between 0.222 and 0.284. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.2226 and a diameter of 9.77 kilometers using on an absolute magnitude of 12.30. Naming This minor planet was named after Finnish astronomer, Yrjö Väisälä (1891–1971), a prolific discoverer of minor planets during the late 1930s and early 1940s. In addition, a second minor planet, 2804 Yrjö, was named in his honor by pioneering Finnish female astronomer Liisi Oterma, and the lunar crater Väisälä also bears his name. The official 1573 naming citation was published by the Minor Planet Center on 31 January 1962 (M.P.C. 2116). Notets LCDB-Pravec-2012 Pravec (2012) web: rotation period 252 hours with a brightness amplitude of 0.76 mag. Pravec, P.; Wolf, M.; Sarounova, L. (2012) Summary figures at DEFPage_Local.php?AstInfo=1573%7CVaisala Collaborative Asteroid Lightcurve Link (CALL) for (1573) Vaisala IMG-Light-Curve-Analysis Light-Curve-Analysis of (1573) Väisälä Screenshot from data References 30em 2017-05-02 last obs. JPL Small-Body Database Browser: 1573 Vaisala (1949 UA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001573 Jet Propulsion Laboratory 5 June 2017 Dictionary of Minor Planet Names – (1573) Väisälä Schmadel Lutz D. Springer Berlin Heidelberg 125 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1574 (1573) Väisälä 1573 Vaisala (1949 UA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1573 29 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 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 – IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 17 October 2019 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri J. Dailey P. R. M. Eisenhardt R. S. McMillan T. B. Spahr M. F. Skrutskie D. Tholen R. G. Walker E. L. Wright E. DeBaun D. Elsbury T. IV Gautier S. Gomillion A. Wilkins November 2011 Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M The Astrophysical Journal 741 2 20 2011ApJ...741...68M 10.1088/0004-637X/741/2/68 1109.4096 118745497 29 December 2016 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 29 December 2016 Asteroid 1573 Vaisala – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1573+Vaisala#Asteroid%201573%20VaisalaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 October 2026 InternetArchiveBot 1573 29 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 35447010 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 29 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/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1573 1572 Posnania 1573 1574 Meyer 001573 Category:Discoveries by Sylvain Arend Category:Named minor planets 001573 19491027