1222 Tina

Main-belt asteroid October 2019 yes 1222 Tina #D6D6D6 11 June 1932 E. Delporte Uccle Obs. (1222) Tina 1932 LA1955 HP Tina (friend of the discoverer) main-belt(middle)Tina 16 February 2017 (JD 2457800.5) 0 84.40 yr (30,827 days) 3.4912 AU 2.0983 AU 2.7947 AU 0.2492 4.67 yr (1,707 days) 31.083° 0.2110 ms / day 19.587° 245.80° 59.912° 20.12 km (derived)20.84 1.8 km25.781 0.138 km26.28 0.33 km28.667 0.122 km 12 h (dated)13.395 0.003 h17.164 0.003 h 0.1445 (derived)0.1645 0.01910.199 0.0060.202 0.0450.3086 0.059 SMASS = XMX 10.311.2 1222 Tina, provisional designation 1932 LA, is a metallic asteroid and parent body of the Tina family located in the intermediate asteroid belt, approximately 25 kilometers in diameter. It was discovered on 11 June 1932, by Belgian astronomer Eugène Delporte at Uccle Observatory in Belgium. It was named after a friend of the discoverer. Classification and orbit Tina is the namesake of the Tina family a group of 17–89 asteroids that form a small, well-defined asteroid family, which share similar spectral properties and orbital elements; hence they may have arisen from the same collisional event of two larger parent bodies. All members have a relatively high orbital inclination. The Tina family is unique because of its resonant nature: all its members are in anti-aligned librating states of the ν6 secular resonance, i.e., the longitudes of pericenter of the asteroids follow the longitudes of pericenter of Saturn by 180 degrees. This orbital configuration protects the asteroids from achieving high eccentricities and experiencing close encounters with terrestrial planets, forming a stable in a region strongly perturbed by the ν6 secular resonance. The family is estimated to be relatively young, about 170 20 30 million years old, and will most likely disperse to unstable regions in timescales of 200 million years. It orbits the Sun at a distance of 2.1–3.5 AU once every 4 years and 8 months (1,707 days). Its orbit has an eccentricity of 0.25 and an inclination of 20° with respect to the ecliptic. The body's observation arc begins with its official discovery observation as no precoveries were taken, and no prior identifications were made. Physical characteristics 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, Tina measures between 20.84 and 26.28 kilometers in diameter and its surface has an albedo between 0.199 and 0.308 (without preliminary results). The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1445 and a diameter of 20.12 kilometers using an absolute magnitude of 11.2. Spectral type In the SMASS taxonomy, Tina is an X-type asteroid, while it is classified as a metal-rich M-type asteroid by the WISE-survey. Rotation period Tina has a well-defined rotation period of 13.395 hours with a brightness variation of 0.18 magnitude (U=3), derived from photometric observations taken by American astronomer Brian Warner at his Palmer Divide Observatory, Colorado, in September 2007 (also see External links). Other lightcurves were obtained by French amateur astronomers Pierre Antonini and Jean-Gabriel Bosch, which gave a period of 17.164 hours and an amplitude of 0.30 magnitude (U=2/2). Naming This minor planet was named after "Tina", an amateur astronomer and friend of the discoverer. In 1955, naming citation was published by Paul Herget in The Names of the Minor Planets (H 114). References 30em 2016-11-04 last obs. JPL Small-Body Database Browser: 1222 Tina (1932 LA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001222 Jet Propulsion Laboratory 26 January 2017 Dictionary of Minor Planet Names – (1222) Tina Schmadel Lutz D. Springer Berlin Heidelberg 102 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1223 (1222) Tina 1222 Tina (1932 LA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1222 26 January 2017 Asteroids and comets rotation curves – (1222) Tina Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001222 26 January 2017 23 April 2019 https://web.archive.org/web/20190423121547/http://obswww.unige.ch/~behrend/page3cou.html#001222 dead Carruba Valerio The stable archipelago in the region of the Pallas and Hansa families MNRAS 408 1 580–600 June 2010 10.1111/j.1365-2966.2010.17146.x 2010MNRAS.408..580C free 11449/9289 free Carruba Valerio Morbidelli Alessandro 1 On the first nu6 anti-aligned librating asteroid family of Tina MNRAS 418 1 2040–2051 November 2011 10.1111/j.1365-2966.2010.18083.x 2011MNRAS.412.2040C free 11449/42410 free Novaković Bojan Cellino Alberto Knežević Zoran 1 Families among high-inclination asteroids Icarus 216 1 69–81 November 2011 10.1016/j.icarus.2011.08.016 1108.3740 2011Icar..216...69N 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 1222 26 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 30 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 (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 Warner, Brian D. June 2008 Asteroid Lightcurve Analysis at the Palmer Divide Observatory - June - October 2007 The Minor Planet Bulletin 35 2 56–60 1052-8091 2008MPBu...35...56W External links 3Kn3s98KRYw The Palmer Divide Observatory: Tour given by Brian Warner (time 4:03 min.) Lightcurve plot of 1222 Tina, Palmer Divide Observatory, B. D. Warner (2007) 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 1222 1221 Amor 1222 1223 Neckar 001222 Category:Discoveries by Eugène Joseph Delporte Category:Named minor planets 001222 19320611