1520 Imatra

Main-belt asteroid October 2019 yes 1520 Imatra #D6D6D6 22 October 1938 Y. Väisälä Turku Obs. (1520) Imatra 1938 UY1938 YH Imatra (Finnish town) main-belt(outer)Ursula 4 September 2017 (JD 2458000.5) 0 78.53 yr (28,682 days) 3.4132 AU 2.8113 AU 3.1123 AU 0.0967 5.49 yr (2,005 days) 179.71° 0.1795 ms / day 15.241° 253.40° 116.83° 53.41 km (derived)53.42 19.70 km53.435 0.370 km53.61 1.4 km53.79 14.73 km55.55 0.60 km56.094 1.824 km58.63 0.70 km 5.23 h (dated)18.609 0.004 h18.635 0.004 h 0.039 0.0090.04 0.030.0428 (derived)0.05 0.060.0561 0.01090.058 0.0020.0615 0.0030.062 0.006 SMASS = CC 10.010.3010.40 0.3510.410.43 1520 Imatra (provisional designation 1938 UY) is a carbonaceous Ursula asteroid from the outer region of the asteroid belt, approximately 54 kilometers in diameter. It was discovered on 22 October 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, who named after the Finnish town of Imatra. Orbit Imatra is a member of the Ursula family (631), a large family of C- and X-type asteroids, named after its parent body, 375 Ursula.23 It orbits the Sun in the outer main-belt at a distance of 2.8–3.4 AU once every 5 years and 6 months (2,005 days; semi-major axis of 3.11 AU). Its orbit has an eccentricity of 0.10 and an inclination of 15° with respect to the ecliptic. No precoveries and no prior identifications were made. Imatra's observation arc begins at Turku, 3 weeks after its official discovery observation. Physical characteristics Imatra is a C-type asteroid in the SMASS taxonomy. Rotation period In July 2008, American astronomer Brian Warner obtained a rotational lightcurve of Imatra at his Palmer Divide Observatory in Colorado. It gave a rotation period of 18.635 hours with a brightness variation of 0.28 magnitude (U=3-), superseding a period of 5.23 hours from observations at Italian and French observatories in the 1990s (U=2). In September 2014, photometric observations by French amateur astronomers Laurent Bernasconi, Romain Montaigut and Arnaud Leroy gave a period of 18.609 hours with an amplitude of 0.27 magnitude (U=2+). 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, Imatra measures between 53.42 and 58.63 kilometers in diameter, and its surface has an albedo between 0.039 and 0.062. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0428 and a diameter of 53.41 kilometers using an absolute magnitude of 10.4. Naming This minor planet is named for the south-eastern Finnish town Imatra, located in South Karelia near the Russian border, about halfway between St Petersburg and Finland's capital Helsinki. The official 1520 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3929). References 2017-05-02 last obs. JPL Small-Body Database Browser: 1520 Imatra (1938 UY) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001520 Jet Propulsion Laboratory 5 June 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 121 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1521 (1520) Imatra 1520 Imatra (1938 UY) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1520 3 January 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 Asteroids and comets rotation curves – (1520) Imatra Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001520 3 January 2017 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001520 dead 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 3 January 2017 Asteroid 1520 Imatra – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1520+Imatra#Asteroid%201520%20ImatraEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 October 2026 InternetArchiveBot D. Nesvorný M. Broz V. Carruba December 2014 Identification and Dynamical Properties of Asteroid Families Asteroids IV 297–321 2015aste.book..297N 10.2458/azu_uapress_9780816532131-ch016 1502.01628 9780816532131 1520 3 January 2017 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 free (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 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 3 January 2017 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 3 January 2017 1509.02522 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 3 January 2017 Warner, Brian D. January 2009 Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2008 May - September http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2009MPBu...36....7W The Minor Planet Bulletin 36 1 7–13 1052-8091 2009MPBu...36....7W 3 January 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 3 January 2017 External links Lightcurve plot of 1520 Imatra, Palmer Divide Observatory, B. D. Warner (2008) 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 1520 1519 Kajaani 1520 1521 Seinäjoki 001520 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 001520 19381022