1807 Slovakia

Slow-rotating main-belt asteroid October 2019 yes 1807 Slovakia #D6D6D6 20 August 1971 M. Antal Skalnaté Pleso Obs. (1807) Slovakia 1971 QA1928 UE1948 UC1951 JA1951 QK1954 NA1960 GB1971 TM 1 Slovakia (country) main-belt(inner) 4 September 2017 (JD 2458000.5) 0 87.74 yr (32,046 days) 2.6229 AU 1.8289 AU 2.2259 AU 0.1784 3.32 yr (1,213 days) 283.80° 0.2968 ms / day 3.4919° 236.35° 140.53° 9.135 0.092 km9.146 0.059 km9.40 km (calculated) 24 h (dated)308.0 0.3 h308.6 h 0.20 (assumed)0.3058 0.04110.309 0.073 SMASS = SS 12.112.512.6113.06 0.93 1807 Slovakia, provisional designation 1971 QA, is a stony asteroid and slow rotator from the inner regions of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 20 August 1971, by Slovak astronomer Milan Antal at Skalnaté pleso Observatory in the High Tatras mountains of Slovakia and named after the Slovak Republic. Orbit and classification The asteroid orbits the Sun in the inner main-belt at a distance of 1.8–2.6 AU once every 3 years and 4 months (1,213 days). Its orbit has an eccentricity of 0.18 and an inclination of 3° with respect to the ecliptic. It was first identified as 1928 UE at Heidelberg Observatory in 1928, extending the body's observation arc by 43 years prior to its official discovery observation at Skalnaté pleso. Physical characteristics In the SMASS classification, Slovakia is a common stony S-type asteroid. Slow rotator Slovakia has an exceptionally long rotation period of 308 hours with a high brightness variation of 1.10 magnitude (U=3-). The Collaborative Asteroid Lightcurve Link (CALL) adopts a period of 308.6 hours with an amplitude of 1.1 magnitude. Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Slovakia measures 9.14 kilometers in diameter, and its surface has an albedo of 0.31, while CALL assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 9.40 kilometers with an absolute magnitude of 12.5 Naming This minor planet was named in honor of the now independent state of Slovakia (Slovak Republic), the country where the discovering observatory is located. At the time Slovakia was still part of the socialistic republic of Czechoslovakia that was formed after World War I and lasted until the end of the Cold War (also see 2315 Czechoslovakia). The official 1807 naming citation was published by the Minor Planet Center on 15 June 1973 (M.P.C. 3508). References 30em 2016-07-13 last obs. JPL Small-Body Database Browser: 1807 Slovakia (1971 QA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001807 Jet Propulsion Laboratory 3 June 2017 Dictionary of Minor Planet Names – (1807) Slovakia Schmadel Lutz D. Springer Berlin Heidelberg 145 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1808 (1807) Slovakia 1807 Slovakia (1971 QA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1807 15 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 – (1807) Slovakia Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001807 15 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001807 dead 1807 15 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 Adrian Galad Leonard Kornos Marek Husarik October 2009 The Very Long Sidereal Period of 1807 Slovakia http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2009MPBu...36..149G The Minor Planet Bulletin 36 4 149–151 1052-8091 2009MPBu...36..149G 15 December 2016 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 15 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 15 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 1807 1806 Derice 1807 1808 Bellerophon 001807 Category:Discoveries by Milan Antal Category:Named minor planets 001807 001807 19710820