1284 Latvia

Main-belt asteroid October 2019 yes 1284 Latvia #D6D6D6 27 July 1933 K. Reinmuth Heidelberg Obs. (1284) Latvia 1933 OP1925 WK1931 DW1933 QP1950 RL Latvia (Republic of Latvia) main-belt(middle) 16 February 2017 (JD 2457800.5) 0 83.45 yr (30,481 days) 3.0967 AU 2.1952 AU 2.6459 AU 0.1704 4.30 yr (1,572 days) 78.834° 0.2290 ms / day 10.874° 302.96° 114.40° 33.27 7.09 km36.81 1.2 km (IRAS:18)41.128 0.457 km41.47 0.52 km45.19 0.74 km47.255 0.627 km 9.55 0.01 h9.552 0.001 h9.644 0.002 h18 h 0.0634 0.00580.069 0.011 0.083 0.0030.1045 0.007 (IRAS:18)0.13 0.06 B–V = 0.768U–B = 0.353T (Tholen), L (SMASS)L 10.20 0.1710.2310.24 1284 Latvia, provisional designation 1933 OP, is a rare-type asteroid from the middle region of the asteroid belt, approximately 37 kilometers in diameter. It was discovered on 27 July 1933, by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, and named after the Republic of Latvia. Orbit and classification Latvia orbits the Sun in the middle main-belt at a distance of 2.2–3.1 AU once every 4 years and 4 months (1,572 days). Its orbit has an eccentricity of 0.17 and an inclination of 11° with respect to the ecliptic. It was first identified as 1925 WK at Moscow Observatory (105) in 1925, and then as 1931 DW at Lowell Observatory in 1931. The body's observation arc begins with its official discovery observation at Heidelberg in 1933. Physical characteristics Spectral type Latvia is classified as a rare T and L type asteroid in the Tholen and SMASS taxonomy schemes, respectively. Both indicate a featureless spectra of a dark and reddish body. Rotation period The current best rated rotational lightcurve of Latvia was obtained by the "Spanish Photometric Asteroid Analysis Group" (OBAS) in September 2015. Lightcurve analysis gave it a rotation period of 9.55 hours with a brightness variation of 0.23 magnitude (U=3-). Previous photometric observations by James W. Brinsfield at Via Capote Observatory G69 and French amateur astronomer Laurent Bernasconi gave a period of 9.552 and 9.644 hours with an amplitude of 0.10 and 0.21 magnitude, respectively (U=2/2). The first rotational lightcurve obtained by Richard P. Binzel in the 1980s gave a twice a long period solution of 18 hours (U=1). 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, Latvia measures between 33.27 and 41.47 kilometers in diameter, and its surface has an albedo between 0.083 and 0.13 (without preliminary results). The Collaborative Asteroid Lightcurve Link adopts the results by IRAS, that is an albedo of 0.1045 and a diameter of 36.81 kilometers with an absolute magnitude of 10.24. Naming This minor planet was named after the Republic of Latvia. Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 118). References 30em 2017-01-08 last obs. JPL Small-Body Database Browser: 1284 Latvia (1933 OP) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001284 Jet Propulsion Laboratory 23 January 2017 Dictionary of Minor Planet Names – (1284) Latvia Schmadel Lutz D. Springer Berlin Heidelberg 106 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1285 (1284) Latvia 1284 Latvia (1933 OP) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1284 23 January 2017 Asteroids and comets rotation curves – (1284) Latvia Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001284 23 January 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001284 dead 1284 23 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 35447010 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 23 January 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 R. P. Binzel J. D. Mulholland December 1983 A photoelectric lightcurve survey of small main belt asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1983Icar...56..519B Icarus 56 3 519–533 0019-1035 1983Icar...56..519B 10.1016/0019-1035(83)90170-7 23 January 2017 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 23 January 2017 6 Alfonso Carreno Garceran Amadeo Aznar Enrique Arce Mansego Pedro Brines Rodriguez Juan Lozano de Haro Alvaro Fornas Silva Gonzalo Fornas Silva Vincente Mas Martinez Onofre Rodrigo Chiner January 2016 Nineteen Asteroids Lightcurves at Asteroids Observers (OBAS) – MPPD: 2015 April – September http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43...92G The Minor Planet Bulletin 43 1 92–97 1052-8091 2016MPBu...43...92G 23 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 53493339 23 January 2017 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 119293330 23 January 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 1284 1283 Komsomolia 1284 1285 Julietta 001284 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001284 001284 19330727