1535 Päijänne

Asteroid October 2019 yes 1535 Päijänne #D6D6D6 9 September 1939 Y. Väisälä Turku Observatory (1535) Päijänne pæi(j)ænːe 1939 RC1933 QE 11944 OA1956 XB1985 XE 2A916 OB Lake Päijänne (Finland) main-belt(outer) 4 September 2017 (JD 2458000.5) 0 83.77 yr (30,598 days) 3.7718 AU 2.5586 AU 3.1652 AU 0.1916 5.63 yr (2,057 days) 23.100° 0.1750 ms / day 6.0561° 264.79° 39.922° 23.836 0.206 km25.518 0.187 km26.12 0.42 km26.36 km (derived)26.72 1.0 km 8.8448 0.0007 h 0.0638 (derived)0.1299 0.0110.140 0.0050.1430 0.02300.164 0.031 CXS 10.711.44 0.0911.5 1535 Päijänne (/pæi(j)ænːe/; provisional designation 1939 RC) is an asteroid from the outer region of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 9 September 1939, by Finnish astronomer Yrjö Väisälä at the Turku Observatory in Southwest Finland. It was later named for Lake Päijänne. Orbit Päijänne orbits the Sun in the outer main-belt at a distance of 2.6–3.8 AU once every 5 years and 8 months (2,057 days). Its orbit has an eccentricity of 0.19 and an inclination of 6° with respect to the ecliptic. It was first identified as A916 OB at Simeiz Observatory in 1916. The body's observation arc begins 6 years prior to its official discovery with its identification as 1933 QE 1 at Heidelberg Observatory. Physical characteristics Päijänne is classified as both S-type and transitional CX-type asteroid. Lightcurves In September 2006, a rotational lightcurve of Päijänne was obtained from photometric observations taken by French amateur astronomer Laurent Bernasconi. The lightcurve analysis gave a well-defined rotation period of 8.8448 hours with a change in brightness of 0.50 magnitude (U=3). Diameter and albedo 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, Päijänne measures between 23.836 and 26.72 kilometers in diameter, and its surface has an albedo between 0.1299 and 0.164. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0638 and a diameter of 26.36 kilometers with an absolute magnitude of 11.5. Naming This minor planet was named for Finland's second largest lake, Päijänne, located in south-central Finland, and more than a thousand square kilometers in size. The official 1535 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3929). References 2017-06-06 last obs. JPL Small-Body Database Browser: 1535 Paijanne (1939 RC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001535 Jet Propulsion Laboratory 30 June 2017 Dictionary of Minor Planet Names – (1535) Päijänne Schmadel Lutz D. Springer Berlin Heidelberg 122 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1536 (1535) Päijänne 1535 Paijanne (1939 RC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1535 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 – (1535) Päijänne Behrend Raoul Geneva Observatory https://obswww.unige.ch/~behrend/page4cou.html#001535 31 December 2016 October 2026 InternetArchiveBot 1535 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 (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 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 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 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/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 1535 1534 Näsi 1535 1536 Pielinen 001535 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 19390909