1534 Näsi

Carbonaceous asteroid October 2019 yes 1534 Näsi #D6D6D6 File:001534-asteroid shape model (1534) Näsi.png Shape model of Näsi derived from its lightcurve 20 January 1939 Y. Väisälä Turku Observatory (1534) Näsi 1939 BK1933 UQ1957 EA1960 UB1962 JAA915 VBA924 WEA924 YE Näsijärvi (Finnish lake) main-belt(middle)Chloris 4 September 2017 (JD 2458000.5) 0 91.56 yr (33,443 days) 3.4155 AU 2.0404 AU 2.7279 AU 0.2520 4.51 yr (1,646 days) 174.04° 0.2188 ms / day 9.7942° 62.135° 42.826° 18.32 5.21 km19.51 0.36 km19.92 0.65 km22.11 km (derived)22.12 0.9 km (IRAS:6)27.52 6.50 km 5.98 0.02 h7.93161 0.00005 h7.9338 0.0003 h7.94 0.02 h9.75 h 0.035 0.0150.07 0.010.0721 (derived)0.0754 0.006 (IRAS:6)0.08 0.040.100 0.004 SMASS = CghC 11.711.7511.8011.88 0.2411.911.9311.9612.05 1534 Näsi (provisional designation 1939 BK) is a carbonaceous asteroid from the middle region of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 20 January 1939, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, and later named for the Finnish lake Näsijärvi. Orbit and classification Näsi orbits the Sun in the central main-belt at a distance of 2.0–3.4 AU once every 4 years and 6 months (1,646 days). Its orbit has an eccentricity of 0.25 and an inclination of 10° with respect to the ecliptic. It was first identified as A915 VB at Simeiz Observatory in 1915. The body's observation arc begins 15 years prior to its official discovery with its identification as 1924 YE at Heidelberg Observatory. Physical characteristics Lightcurve observations In April 2007, the so-far best rated rotational lightcurve of Näsi was obtained by Jason Sauppe at Oakley Observatory in the United States. The lightcurve analysis gave a rotation period of 7.94 hours with a brightness variation of 0.35 magnitude (U=3-). Periods from other photometric observations were obtained by astronomers René Roy in May 2016 (5.98 hours, Δ0.47 mag, U=2+), Giovanni de Sanctis in the 1990s (9.75 hours, Δ0.22 mag, U=2), Adrián Galád in October 2005 (7.9338 hours, Δ0.51 mag, U=2-), and a period of 7.93161 hours modeled from various data sources and published in 2016 (U=n.a.). Spectral type, diameter and albedo In the SMASS taxonomy, the carbonaceous C-type asteroid is also classified as a Cgh-subtype. 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, Näsi measures between 18.32 and 27.52 kilometers in diameter and its surface has an albedo between 0.035 and 0.100. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0721 and a diameter of 22.11 kilometers based on an absolute magnitude of 11.75. Naming This minor planet is named for the large Finnish lake Näsijärvi, sometimes called "Näsi". It measures 256 square kilometers (99 sq mi) in size and is located only 95 metres above sea level. The official 1534 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3929). References 2016-07-15 last obs. JPL Small-Body Database Browser: 1534 Nasi (1939 BK) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001534 Jet Propulsion Laboratory 30 June 2017 Dictionary of Minor Planet Names – (1534) Näsi Schmadel Lutz D. Springer Berlin Heidelberg 122 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1535 (1534) Näsi 1534 Nasi (1939 BK) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1534 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 Asteroids and comets rotation curves – (1534) Näsi Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001534 31 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001534 dead 1534 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 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 M. C. de Sanctis M. A. Barucci C. A. Angeli M. Fulchignoni R. Burchi P. Angelini October 1994 Photoelectric and CCD observations of 10 asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1994P&SS...42..859D Planetary and Space Science 42 10 859–864 0032-0633 1994P&SS...42..859D 10.1016/0032-0633(94)90066-3 31 December 2016 Jason Sauppe Steven Torno Robert Lemke-Oliver Richard Ditteon December 2007 Asteroid Lightcurve Analysis at the Oakley Observatory - March/April 2007 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2007MPBu...34..119S The Minor Planet Bulletin 34 4 119–122 1052-8091 2007MPBu...34..119S 31 December 2016 Galád, A. May 2010 Accuracy of calibrated data from the SDSS moving object catalog, absolute magnitudes, and probable lightcurves for several asteroids Astronomy and Astrophysics 514 10 2010A&A...514A..55G 10.1051/0004-6361/201014029 free 6 J. Hanus J. Durech D. A. Oszkiewicz R. Behrend B. Carry M. Delbo O. Adam V. Afonina R. Anquetin P. Antonini L. Arnold M. Audejean P. Aurard M. Bachschmidt B. Baduel E. Barbotin P. Barroy P. Baudouin L. Berard N. Berger L. Bernasconi J.-G. Bosch S. Bouley I. Bozhinova J. Brinsfield L. Brunetto G. Canaud J. Caron F. Carrier G. Casalnuovo S. Casulli M. Cerda L. Chalamet S. Charbonnel B. Chinaglia A. Cikota F. Colas J.-F. Coliac A. Collet J. Coloma M. Conjat E. Conseil R. Costa R. Crippa M. Cristofanelli Y. Damerdji Debackè A. re A. Decock Q. Déhais T. Déléage S. Delmelle C. Demeautis M. Drózdz G. Dubos T. Dulcamara M. Dumont R. Durkee R. Dymock A. Escalante del Valle N. Esseiva R. Esseiva M. Esteban T. Fauchez M. Fauerbach M. Fauvaud S. Fauvaud E. Forné C. Fournel D. Fradet J. Garlitz O. Gerteis C. Gillier M. Gillon R. Giraud J.-P. Godard R. Goncalves Hiroko Hamanowa Hiromi Hamanowa K. Hay S. Hellmich S. Heterier D. Higgins R. Hirsch G. Hodosan M. Hren A. Hygate N. Innocent H. Jacquinot S. Jawahar E. Jehin L. Jerosimic A. Klotz W. Koff P. Korlevic E. Kosturkiewicz P. Krafft Y. Krugly F. Kugel O. Labrevoir J. Lecacheux M. Lehký A. Leroy B. Lesquerbault M. J. Lopez-Gonzales M. Lutz B. Mallecot J. Manfroid F. Manzini A. Marciniak A. Martin B. Modave R. Montaigut J. Montier E. Morelle B. Morton S. Mottola R. Naves J. Nomen J. Oey W. Ogloza M. Paiella H. Pallares A. Peyrot F. Pilcher J.-F. Pirenne P. Piron M. Polinska M. Polotto R. Poncy J. P. Previt F. Reignier D. Renauld D. Ricci F. Richard C. Rinner V. Risoldi D. Robilliard D. Romeuf G. Rousseau R. Roy J. Ruthroff P. A. Salom L. Salvador S. Sanchez T. Santana-Ros A. Scholz G. Séné B. Skiff K. Sobkowiak P. Sogorb F. Soldán A. Spiridakis E. Splanska S. Sposetti D. Starkey R. Stephens A. Stiepen R. Stoss J. Strajnic J.-P. Teng G. Tumolo A. Vagnozzi B. Vanoutryve J. M. Vugnon B. D. Warner M. Waucomont O. Wertz M. Winiarski M. Wolf February 2016 New and updated convex shape models of asteroids based on optical data from a large collaboration network Astronomy and Astrophysics 586 24 2016A&A...586A.108H 10.1051/0004-6361/201527441 1510.07422 119112278 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 1534 1533 Saimaa 1534 1535 Päijänne 001534 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 001534 19390120