1212 Francette

Hildian asteroid October 2019 yes 1212 Francette #D6D6D6 L. Boyer Algiers Obs. 3 December 1931 (1212) Francette 1931 XC1949 HB 11949 HZ1965 JBA918 KA Francette Boyer(discoverer's wife) main-belt(outer)Hilda 4 September 2017 (JD 2458000.5) 0 85.98 yr (31,406 days) 4.7109 AU 3.1972 AU 3.9541 AU 0.1914 7.86 yr (2,872 days) 282.89° 0.1254 ms / day 7.5898° 149.58° 348.23° 0.3433 AU 76.395 0.155 km82.13 3.2 km85.81 2.18 km 16 h (poor)22.433 0.007 hLightcurve-plot-CS3 0.037 0.0020.0400 0.0030.040 0.0070.046 0.007 Tholen PPSMASS XB–V 0.693U–B 0.215 9.549.62 0.23 1212 Francette (provisional designation 1931 XC) is a dark Hildian asteroid from the outermost regions of the asteroid belt, approximately 82 kilometers in diameter. It was discovered on 3 December 1931, by French astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa, who named it after his wife Francette Boyer. Orbit and classification Francette is the second largest member of the small Hilda family (001), an asteroid family within the dynamical Hilda group, that stays in an orbital resonance with the gas giant Jupiter. It orbits the Sun in the outermost asteroid belt at a distance of 3.2–4.7 AU once every 7 years and 10 months (2,872 days; semi-major axis of 3.95 AU). Its orbit has an eccentricity of 0.19 and an inclination of 8° with respect to the ecliptic. The asteroid was first observed as A918 KA at Simeiz Observatory in May 1918. The body's observation arc begins at Algiers with its official discovery observation. Physical characteristics In the Tholen classification, Francette is a primitive P-type asteroid. In the SMASS classification it is an X-type asteroid. The Wide-field Infrared Survey Explorer (WISE) also characterizes Francette as a dark P-type, while the overall spectral type for members of the Hilda family is typically that of a carbonaceous C-type.23 Rotation period In July 2016, a rotational lightcurve of Francette was obtained from photometric observations by American astronomers Brian Warner, Robert Stephens and Dan Coley at the Center for Solar System Studies (U80–82) in California. Lightcurve analysis gave a rotation period of 22.433 hours with a brightness variation of 0.13 magnitude (U=2/3-), superseding a period of 16 hours, previously measured in the 1970s.Lightcurve-plot-CS3 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, Francette measures between 76.395 and 85.81 kilometers in diameter and its surface has an albedo between 0.037 and 0.046. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0400 and a diameter of 82.13 kilometers based on an absolute magnitude of 9.54. Naming This minor planet was named by the discoverer after his wife, Francette Boyer. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 112). Notes Lightcurve-plot-CS3 Lightcurve plot of (1212) Francette by Warner, Stephens and Coley at the CS3 from 5 July to 2 August 2016 rotation period 22.433 0.007 hours and an amplitude of 0.13 mag. Quality code of 3-. Summary figures at the LCDB References 30em 2017-11-27 last obs. JPL Small-Body Database Browser: 1212 Francette (1931 XC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001212 Jet Propulsion Laboratory 5 January 2018 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 101 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1213 (1212) Francette 1212 Francette (1931 XC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1212 5 January 2018 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 5 January 2018 Asteroid 1212 Francette – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1212+Francette#Asteroid%201212%20FrancetteEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 https://web.archive.org/web/20201004034036/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1212+Francette#Asteroid%201212%20FrancetteEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 dead 4 October 2020 26 October 2019 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 119280014 1212 5 January 2018 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) 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 R. C. Taylor T. Gehrels R. C. Capen September 1976 Minor planets and related objects. XXI – Photometry of eight asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1976AJ.....81..778T Astronomical Journal 81 778–786.NASA–supportedresearch 1976AJ.....81..778T 10.1086/111953 5 January 2018 Brian D. Warner Robert D. Stephens Daniel A. Coley January 2017 Lightcurve Analysis of Hilda Asteroids at the Center for Solar System Studies: 2016 June–September The Minor Planet Bulletin 44 1 36–41 32455390 7243970 1052-8091 2017MPBu...44...36W 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 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 5 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 1212 1211 Bressole 1212 1213 Algeria 001212 Category:Discoveries by Louis Boyer (astronomer) Category:Named minor planets 001212 001212 19311203