1479 Inkeri

Main-belt asteroid October 2019 yes 1479 Inkeri #D6D6D6 Y. Väisälä Turku Obs. 16 February 1938 (1479) Inkeri 1938 DE1934 FR1956 JDA916 ACA923 RG Ingria(former Finnish province)(discoverer's family members) main-belt(middle)background 4 September 2017 (JD 2458000.5) 0 93.63 yr (34,199 days) 3.1920 AU 2.1636 AU 2.6778 AU 0.1920 4.38 yr (1,601 days) 91.083° 0.2249 ms / day 7.3024° 18.110° 80.004° 15.206 0.117 km18.35 km (calculated)18.83 5.10 km22.70 0.56 km31.86 0.33 km 5 h (dated)12.55 h (dated)660 5 h 0.033 0.0060.07 0.060.095 0.0050.10 (assumed)0.222 0.003 Tholen XFUB–V 0.699 11.4011.8011.912.0012.45 1.49 1479 Inkeri, provisional designation 1938 DE, is an asteroid from the central regions of the asteroid belt. It is an exceptionally slow rotator, suspected tumbler and measures approximately 19 kilometers in diameter. It was discovered on 16 February 1938, by Finnish astronomer Yrjö Väisälä at the Iso-Heikkilä Observatory in Turku, Finland. "Inkeri" is the name of two of the discoverer's younger relatives as well as the local name of the former Finnish province of Ingria. Orbit and classification Inkeri is a non-family asteroid from the main belt's background population. It orbits the Sun in the central asteroid belt at a distance of 2.2–3.2 AU once every 4 years and 5 months (1,601 days). Its orbit has an eccentricity of 0.19 and an inclination of 7° with respect to the ecliptic. The asteroid was first identified as A916 AC at Simeiz Observatory in January 1916. The body's observation arc begins with its identification as 1923 RG at Heidelberg Observatory in September 1923, more than 14 years prior to its official discovery observation at Turku. Physical characteristics In the Tholen classification, Inkeris spectral type is ambiguous (XFU). It is closest to that of an X-type asteroid and somewhat similar to the F-types. In addition, the spectrum has also been flagged as "unusual" (U). Slow rotator and tumbler In December 2011, a rotational lightcurve of Inkeri was obtained from photometric observations by Andrea Ferrero at the Bigmuskie Observatory B88, Italy, in collaboration with Frederick Pilcher at the Organ Mesa Observatory G50 in New Mexico, United States. Analysis of the bimodal lightcurve gave an exceptionally long rotation period of 660 hours with a brightness amplitude of 1.30 magnitude (U=2+). This makes it one of the slowest rotators known to exist. The observers also suspect that the body is a tumbling asteroid in a non-principal axis rotation. These results supersede previous period solutions of 5 and 12.55 hours (U=1/1). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Inkeri measures between 15.206 and 31.86 kilometers in diameter and its surface has an albedo between 0.033 and 0.2222. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 and calculates a diameter of 18.35 kilometers based on an absolute magnitude of 11.8. Naming This minor planet was named "Inkeri", a Finnish female name, held by Vaisala's granddaughter and niece. It is also the Finnish name of Ingria, a formerly-Finnish province near Saint Petersburg that is now part of Russia. The official 1479 naming citation was published by the Minor Planet Center in January 1956 (M.P.C. 1350). References 30em 2017-05-01 last obs. JPL Small-Body Database Browser: 1479 Inkeri (1938 DE) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001479 Jet Propulsion Laboratory 20 October 2017 Dictionary of Minor Planet Names https://archive.org/details/dictionaryminorp00schm limited (1479) Inkeri Schmadel Lutz D. Springer Berlin Heidelberg 118 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1480 1479 Inkeri (1938 DE) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1479 20 October 2017 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 Asteroids and comets rotation curves – (1479) Inkeri Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001479 20 October 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001479 dead 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 20 October 2017 Asteroid 1479 Inkeri – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1479 29 October 2019 1479 20 October 2017 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 20 October 2017 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 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 35447010 Brinsfield, James W. September 2008 Asteroid Lightcurve Analysis at the Via Capote Observatory: First Quarter 2008 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35..119B The Minor Planet Bulletin 35 3 119–122 1052-8091 2008MPBu...35..119B 20 October 2017 Andrea Ferrero Frederick Pilcher July 2012 The Very Long Period of 1479 Inkeri http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39..192F The Minor Planet Bulletin 39 3 192–193 1052-8091 2012MPBu...39..192F 20 October 2017 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 20 October 2017 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 1479 1478 Vihuri 1479 1480 Aunus 001479 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 001479 001479 19380216