1644 Rafita

Main-belt asteroid October 2019 yes 1644 Rafita #D6D6D6 16 December 1935 R. Carrasco Madrid Obs. (1644) Rafita 1935 YA1939 XA1941 JB1949 JC1951 VF1955 TS1957 GD1959 UDA906 RBA916 BA Rafael Carrasco(discoverer's son) main-belt(middle)Rafita-interloper23 4 September 2017 (JD 2458000.5) 0 110.53 yr (40,371 days) 2.9426 AU 2.1539 AU 2.5483 AU 0.1548 4.07 yr (1,486 days) 13.784° 0.2423 ms / day 7.0193° 270.90° 197.05° 13.958 0.157 km15.405 0.072 km15.48 km (taken)15.482 km17.69 1.08 km 5.100 0.002 h6.800 0.004 h 0.106 0.0140.13290.1403 0.01480.164 0.028 Tholen = SB–V = 0.867U–B = 0.404 11.8211.82 0.2111.86 0.02 1644 Rafita, provisional designation 1935 YA, is a stony asteroid from the middle region of the asteroid belt, approximately 15 kilometers in diameter. It is the namesake of the Rafita family, a family of stony asteroids in the intermediate main-belt. However, Rafita is a suspected interloper in its own family.23 It was discovered on 16 December 1935, by Spanish astronomer Rafael Carrasco Garrorena at the Royal Observatorio Astronómico de Madrid in Spain, and named in memory of the discoverer's son. Orbit and classification thumb|Orbit|left Rafita asteroid orbits the Sun in the central main-belt at a distance of 2.2–2.9 AU once every 4 years and 1 month (1,486 days). Its orbit has an eccentricity of 0.15 and an inclination of 7° with respect to the ecliptic. Rafita was first observed as A906 RB at Heidelberg Observatory in 1906, extending the body's observation arc by 29 years prior to its official discovery observation. Lightcurves Rafitas first rotational lightcurve was obtained by American astronomer Alan Harris of JPL in January 1981. It gave a rotation period of 5.100 hours with a brightness variation of 0.31 magnitude (U=2). Photometric observations by French amateur astronomer Laurent Bernasconi in December 2004, gave a period of 6.800 hours and an amplitude of 0.13 magnitude (U=2). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Rafita measures between 13.96 and 17.69 kilometers in diameter, and its surface has an albedo between 0.106 and 0.164. The Collaborative Asteroid Lightcurve Link agrees with Petr Pravec's revised WISE-results, that is an albedo of 0.1329 and a diameter of 15.482 kilometers, based on an absolute magnitude of 11.86. Naming This minor planet was named by the discoverer in honor of his late son, Rafael Carrasco. The official 1644 naming citation was published by the Minor Planet Center on 30 January 1964 (M.P.C. 2277). References 2017-03-24 last obs. JPL Small-Body Database Browser: 1644 Rafita (1935 YA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001644 Jet Propulsion Laboratory 30 June 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 130 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1645 (1644) Rafita 1644 Rafita (1935 YA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1644 27 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 Asteroids and comets rotation curves – (1644) Rafita Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001644 27 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001644 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 27 December 2016 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 1644 27 December 2016 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 Petr Pravec Alan W. Harris Peter Kusnirák Adrián Galád Kamil Hornoch September 2012 Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P Icarus 221 1 365–387 2012Icar..221..365P 10.1016/j.icarus.2012.07.026 27 December 2016 11104/0217021 free A. W. Harris J. W. Young October 1989 Asteroid lightcurve observations from 1979-1981 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1989Icar...81..314H Icarus 81 2 314–364 0019-1035 1989Icar...81..314H 10.1016/0019-1035(89)90056-0 27 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 27 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/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1644 1643 Brown 1644 1645 Waterfield 001644 Category:Discoveries by Rafael Carrasco Garrorena Category:Named minor planets 001644 19351216