1180 Rita

Main-belt asteroid December 2019 yes 1180 Rita #D6D6D6 9 April 1931 K. Reinmuth Heidelberg Obs. (1180) Rita 1931 GE1929 CM1953 AH1957 UF 1A907 GGA908 KAA916 LA unknown main-belt(outer)Hilda 16 February 2017 (JD 2457800.5) 0 109.98 yr (40,172 days) 4.6127 AU 3.3574 AU 3.9851 AU 0.1575 7.96 yr (2,906 days) 209.15° 0.1239 ms / day 7.1985° 88.336° 209.12° 0.6111 AU 82.72 km (calculated)97 km97.63 2.30 km 9 h9.605 0.006 h12 h13.090 0.002 hLCDB-Warner-201714.72 h14.902 h20.496 0.005 hLCDB-Slyusarev-2012 0.041 0.0020.044 0.0080.0480.057 (assumed)0.058 0.009 Tholen = PPB–V 0.6820.670 0.010LCDB-Slyusarev-2012U–B = 0.216V–R = 0.440 0.010LCDB-Slyusarev-2012 9.149.17 0.19 1180 Rita, provisional designation 1931 GE, is a dark and spheroidal Hildian asteroid from the outermost regions of the asteroid belt, approximately 97 kilometers in diameter. It was discovered on 9 April 1931, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. Any reference of its later name, Rita, is unknown. Orbit and classification Rita belongs to the orbital Hilda group which is located in the outermost part of the main-belt. Asteroids in this dynamical group have semi-major axis between 3.7 and 4.2 AU and stay in a 3:2 resonance with the gas giant Jupiter. Rita, however, is a background asteroid and not a member of the (collisional) Hilda family (101). Hildian asteroids are thought to have originated from the Kuiper belt. The asteroid orbits the Sun at a distance of 3.4–4.6 AU once every 7 years and 12 months (2,906 days). Its orbit has an eccentricity of 0.16 and an inclination of 7° with respect to the ecliptic. It was first observed as A907 GG at Heidelberg in 1907. The body's observation arc begins at Heidelberg in 1908, when it was identified as A908 KA, approximately 23 years prior to its official discovery observation. Physical characteristics In the Tholen taxonomy, Rita is a dark and reddish P-type asteroid. The P-type asteroids are some of the darkest objects in the Solar System. Rotation period Since 1983, several rotational lightcurves of Rita have been obtained from photometric observations. Lightcurve analysis gave a wide range of divergent rotation periods between 9 and 20.5 hours.LCDB-Slyusarev-2012 The Light Curve Data Base adopts a period of 13.090 hours with a brightness amplitude of 0.06 magnitude. Bodies with such a low brightness variation are typically of a spherical rather than elongated shape. The lightcurve was obtained in January 2017, by American astronomer Brian Warner at the Center for Solar System Studies in California (U=2).LCDB-Warner-2017 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, Rita measures 97 kilometers in diameter and its surface has an albedo between 0.041 and 0.058. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous, outer main-belt asteroids of 0.057, and calculates a diameter of 82.72 kilometers with on an absolute magnitude of 9.14. Naming Any reference of this minor planet's name to a person or occurrence is unknown. Unknown meaning Among the many thousands of named minor planets, Rita is one of 120 asteroids, for which no official naming citation has been published. All of these low-numbered asteroids have numbers between 164 164 Eva and 1514 1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomers Auguste Charlois, Johann Palisa, Max Wolf and Karl Reinmuth. Notes LCDB-Warner-2017 Warner (2017) web: lightcurve plot of 1180 Rita – rotation period 13.090 0.002 hours with a brightness amplitude of 0.06 0.01 magnitude. No quality code of 2. Observed between 12 December 2016 and 26 January 2017, with a total of 304 data points. Summary figures at the Light Curve Data Base. LCDB-Slyusarev-2012 Slyusarev (2012) web: rotation period 20.496 0.005 hours with a brightness amplitude of 0.05 magnitude. No quality code determined. Color Indices for BV and VR are 0.670 0.010 and 0.440 0.010, respectively. Summary figures at the Light Curve Data Base. References 30em 2017-03-29 last obs. JPL Small-Body Database Browser: 1180 Rita (1931 GE) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001180 Jet Propulsion Laboratory 27 April 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 99 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1181 (1180) Rita Dictionary of Minor Planet Names – Fifth Revised and Enlarged revision Appendix 11 – Minor Planet Names with Unknown Meaning Schmadel Lutz D. Springer Berlin Heidelberg 927–929 2007 978-3-540-00238-3 Lutz D. Schmadel 1180 Rita (1931 GE) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1180 27 April 2017 Asteroids and comets rotation curves – (1180) Rita Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001180 27 April 2017 3 December 2002 https://web.archive.org/web/20021203214643/http://obswww.unige.ch/~behrend/page3cou.html#001180 dead 6 T. Grav A. K. Mainzer J. Bauer J. Masiero T. Spahr R. S. McMillan R. Walker R. Cutri E. Wright P. R. Eisenhardt E. Blauvelt E. DeBaun D. Elsbury T. Gautier S. Gomillion E. Hand A. Wilkins January 2012 WISE/NEOWISE Observations of the Hilda Population: Preliminary Results http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...744..197G The Astrophysical Journal 744 2 15 2012ApJ...744..197G 10.1088/0004-637X/744/2/197 1110.0283 44000310 27 April 2017 Asteroid 1180 Rita – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1180 28 October 2019 1180 27 April 2017 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 M. Gonano S. Mottola G. Neukum M. di Martino December 1990 Physical study of outer belt asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1991AdSpR..11..197G Space Dust and Debris; Proceedings of the Topical Meeting of the Interdisciplinary Scientific Commission B /Meetings B2 11 12 197–200 0273-1177 1991AdSpR..11l.197G 10.1016/0273-1177(91)90563-Y 27 April 2017 Richard P. Binzel Linda M. Sauter February 1992 Trojan, Hilda, and Cybele asteroids - New lightcurve observations and analysis http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1992Icar...95..222B Icarus 95 2 222–238 0019-1035 1992Icar...95..222B 10.1016/0019-1035(92)90039-A 27 April 2017 6 M. Dahlgren J. F. Lahulla C.-I. Lagerkvist J. Lagerros S. Mottola A. Erikson M. Gonano-Beurer M. Di Martino June 1998 A Study of Hilda Asteroids. V. Lightcurves of 47 Hilda Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1998Icar..133..247D Icarus 133 2 247–285 1998Icar..133..247D 10.1006/icar.1998.5919 27 April 2017 Polishook, David October 2012 Lightcurves for Shape Modeling: 852 Wladilena, 1089 Tama, and 1180 Rita http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39..242P The Minor Planet Bulletin 39 4 242–244 1052-8091 2012MPBu...39..242P 27 April 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 27 April 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 1180 1179 Mally 1180 1181 Lilith 001180 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001180 19310409