1161 Thessalia

Main-belt asteroid October 2019 yes 1161 Thessalia #D6D6D6 K. Reinmuth Heidelberg Obs. 29 September 1929 (1161) Thessalia 1929 SF1931 BB θ ᵻ ˈ s eɪ l i əThessalian Thessaly (Greek region) main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 87.76 yr (32,056 days) 3.4488 AU 2.8975 AU 3.1732 AU 0.0869 5.65 yr (2,065 days) 213.02° 0.1744 ms / day 9.3913° 72.567° 309.20° 21.498 0.184 km 0.065 0.010 11.2 1161 Thessalia, provisional designation 1929 SF, is a dark background asteroid from the outer regions of the asteroid belt, approximately 21 kilometers in diameter. It was discovered on 29 September 1929, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory. It was named for the Greek region Thessaly. Orbit and classification Thessalia is a non-family asteroid from the main belt's background population. It orbits the Sun in the outer main-belt at a distance of 2.9–3.4 AU once every 5 years and 8 months (2,065 days). Its orbit has an eccentricity of 0.09 and an inclination of 9° with respect to the ecliptic. The body's observation arc begins at Heidelberg, five weeks after its official discovery observation. Physical characteristics Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Thessalia measures 21.498 kilometers in diameter and its surface has an albedo of 0.065. Lightcurves As of 2017, no rotational lightcurve of Thessalia has been obtained from photometric observations. The asteroid's rotation period, poles and shape remain unknown. Naming This minor planet was named for the Thessaly region in eastern Greece. The subsequently numbered minor planet 1162 Larissa was named after the region's capital. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 108). References 30em 2017-07-05 last obs. JPL Small-Body Database Browser: 1161 Thessalia (1929 SF) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001161 Jet Propulsion Laboratory 7 September 2017 Dictionary of Minor Planet Names – (1161) Thessalia Schmadel Lutz D. Springer Berlin Heidelberg 98 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1162 (1161) Thessalia 1161 Thessalia (1929 SF) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1161 7 September 2017 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 7 September 2017 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri C. Nugent M. S. Cabrera November 2012 Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M The Astrophysical Journal Letters 759 1 5 2012ApJ...759L...8M 10.1088/2041-8205/759/1/L8 1209.5794 7 September 2017 Asteroid 1161 Thessalia – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1161 28 October 2019 1161 7 September 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 1161 1160 Illyria 1161 1162 Larissa 001161 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19290929