1214 Richilde

Main-belt asteroid October 2019 yes 1214 Richilde #D6D6D6 001214-asteroid shape model (1214) Richilde.png Shape model of Richilde from its lightcurve M. F. Wolf Heidelberg Obs. 1 January 1932 (1214) Richilde 1932 AA1930 QD1961 PC unknown main-belt(middle)background 4 September 2017 (JD 2458000.5) 0 86.52 yr (31,602 days) 3.0319 AU 2.3881 AU 2.7100 AU 0.1188 4.46 yr (1,629 days) 207.11° 0.2209 ms / day 9.8345° 285.92° 32.580° 30.70 12.73 km33.26 8.39 km33.651 8.835 km34.134 0.253 km34.94 0.50 km35.22 km (derived)35.29 3.2 km36.668 0.575 km39.58 11.00 km 9.860 h9.86687 0.00005 h9.870 0.001 h 0.044 0.0510.048 0.0150.0517 (derived)0.0518 0.08530.0550 0.00550.06 0.020.0619 0.0130.064 0.0020.07 0.04 SMASS XkP 10.9011.0311.0911.09 0.4011.1011.20 1214 Richilde, provisional designation 1932 AA, is a dark background asteroid from the central regions of the asteroid belt, approximately 35 kilometers in diameter. It was discovered by Max Wolf at Heidelberg Observatory in 1932. Any reference of the asteroid's name to a person is unknown. Discovery Richilde was discovered on 1 January 1932, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory in southwest Germany. Five nights later, on 6 January 1932, it was independently discovered by Japanese astronomer K. Nakamura at Kwasan Observatory (377), Kyoto. The Minor Planet Center only recognizes the first discoverer. The body's observation arc begins with its first observation as 1930 QD at Uccle Observatory in August 1930, approximately 16 months prior to its official discovery observation at Heidelberg. Orbit and classification Richilde is a non-family asteroid from the main-belt's background population. It orbits the Sun in the central asteroid belt at a distance of 2.4–3.0 AU once every 4 years and 6 months (1,629 days; semi-major axis of 2.71 AU). Its orbit has an eccentricity of 0.12 and an inclination of 10° with respect to the ecliptic. Physical characteristics In the SMASS, Richilde is a Xk-subtype, that transitions from the X-type to the rare K-type asteroids, while the Wide-field Infrared Survey Explorer (WISE) characterizes the body as a primitive P-type asteroid. Rotation period and pole In the 1990s, a rotational lightcurve of Richilde was first obtained from photometric observations by astronomers using the ESO 1-metre telescope at the La Silla Observatory in Chile. Lightcurve analysis gave a well-defined rotation period of 9.860 hours with a brightness variation of 0.32 magnitude (U=3). In October 2006, a concurring period of 9.870 hours and an amplitude of 0.31 was measured by French amateur astronomer Raymond Poncy (U=3-). In 2011, a modeled lightcurve using data from the Uppsala Asteroid Photometric Catalogue (UAPC) and other sources gave a period 9.86687 hours, as well as a partial spin axis of (n.a.°, –59.0°) in ecliptic coordinates (λ, β). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's WISE telescope, Richilde measures between 30.70 and 39.58 kilometers in diameter and its surface has an albedo between 0.044 and 0.07. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0517 and a diameter of 35.22 kilometers based on an absolute magnitude of 11.10. Naming This minor planet is named after a common German female name. Any reference of this name to a person or occurrence is unknown (AN 247, 153). Unknown meaning Among the many thousands of named minor planets, Richilde is one of 120 asteroids, for which no official naming citation has been published. All of these asteroids have low 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. References 30em 2017-03-29 last obs. JPL Small-Body Database Browser: 1214 Richilde (1932 AA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001214 Jet Propulsion Laboratory 23 January 2018 Dictionary of Minor Planet Names – (1214) Richilde Schmadel Lutz D. Springer Berlin Heidelberg 101 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1215 (1214) Richilde 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 1214 Richilde (1932 AA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1214 23 January 2018 Asteroids and comets rotation curves – (1214) Richilde Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001214 23 January 2018 23 April 2019 https://web.archive.org/web/20190423121547/http://obswww.unige.ch/~behrend/page3cou.html#001214 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 The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 119293330 Asteroid 1214 Richilde – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1214 28 October 2019 1214 23 January 2018 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. 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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 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 1509.02522 9341381 23 January 2018 6 Joseph R. Masiero C. Nugent A. K. Mainzer E. L. Wright J. M. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett October 2017 NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos The Astronomical Journal 154 4 10 2017AJ....154..168M 10.3847/1538-3881/aa89ec 1708.09504 free 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. A. Barucci M. di Martino E. Dotto M. Fulchignoni A. Rotundi R. Burchi June 1994 Rotational properties of small asteroids: Photoelectric observations of 16 asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1994Icar..109..267B Icarus 109 2 267–273 0019-1035 1994Icar..109..267B 10.1006/icar.1994.1092 23 January 2018 6 Hanus, J. Durech, J. Broz, M. Warner, B. D. Pilcher, F. Stephens, R. Oey, J. Bernasconi, L. Casulli, S. Behrend, R. Polishook, D. Henych, T. Lehký, M. Yoshida, F. Ito, T. June 2011 A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011A&A...530A.134H Astronomy & Astrophysics 530 16 2011A&A...530A.134H 10.1051/0004-6361/201116738 1104.4114 23 January 2018 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 2018 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 1214 1213 Algeria 1214 1215 Boyer 001214 Category:Discoveries by Max Wolf Category:Named minor planets 001214 19320101