1160 Illyria

Main-belt asteroid October 2019 yes 1160 Illyria #D6D6D6 File:001160-asteroid shape model (1160) Illyria.png Modelled shape of Illyria from its lightcurve K. Reinmuth Heidelberg Obs. 9 September 1929 (1160) Illyria 1929 RL1962 WA ɪ ' l ɪr i əIllyria Illyria (region on the Balkans) main-belt(middle)EunomiaMaria 4 September 2017 (JD 2458000.5) 0 87.73 yr (32,045 days) 2.8628 AU 2.2591 AU 2.5610 AU 0.1179 4.10 yr (1,497 days) 166.36° 0.2405 ms / day 14.963° 3.7920° 4.6994° 12.73 1.07 km13.85 0.49 km13.88 km (calculated)13.977 0.227 km14.767 0.219 km 4.1025 0.0002 h4.10295 0.00005 h4.104 0.001 h4.3 0.3 h (poor) 0.21 (assumed)0.2242 0.03660.249 0.0140.291 0.3120.349 0.028 S (assumed) 11.1011.16 0.3811.411.4311.6 1160 Illyria, provisional designation 1929 RL, is a stony Maria asteroid from the central regions of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 9 September 1929, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The asteroid was named after the ancient region of Illyria, located on the Balkan Peninsula. Orbit and classification Based on the Hierarchical Clustering Method, which uses a body's proper orbital elements, Illyria is a member of the Maria family (506),18 a large intermediate belt family of stony asteroids. It has also been grouped into the Eunomia family (502), an even larger family with more than 5,000 known members. Illyria orbits the Sun in the central asteroid belt at a distance of 2.3–2.9 AU once every 4 years and 1 month (1,497 days; semi-major axis of 2.56 AU). Its orbit has an eccentricity of 0.12 and an inclination of 15° with respect to the ecliptic. The body's observation arc begins with a recovery observation at Lowell Observatory in October 1929, three weeks after its official discovery observation at Heidelberg. Physical characteristics Illyria is an assumed stony S-type asteroid, which agrees with the overall spectral type of both the Maria and Eunomia family.23 Rotation period Several rotational lightcurves of Illyria have been obtained from photometric observations since 2007. Lightcurve analysis gave a consolidated rotation period of 4.1025 hours with a brightness amplitude between 0.56 and 0.91 magnitude (U=3). Spin axis In 2013, an international study also modeled the asteroid's lightcurve from photometric data. It gave a concurring period of 4.10295 hours and determined a partial spin axis of (n.a., 47.0°) in ecliptic coordinates (λ, β). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Illyria measures between 12.73 and 14.767 kilometers in diameter and its surface has an albedo between 0.2242 and 0.349. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21, derived from the parent body of the Eunomia family, and calculates a diameter of 13.88 kilometers based on an absolute magnitude of 11.6. Naming This minor planet was named after Illyria, an ancient region on the Balkans which borders the Adriatic Sea. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 108). References 30em 2017-06-04 last obs. JPL Small-Body Database Browser: 1160 Illyria (1929 RL) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001160 Jet Propulsion Laboratory 29 November 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 98 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1161 (1160) Illyria 1160 Illyria (1929 RL) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1160 29 November 2017 Asteroids and comets rotation curves – (1160) Illyria Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001160 29 November 2017 3 December 2002 https://web.archive.org/web/20021203214643/http://obswww.unige.ch/~behrend/page3cou.html#001160 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 Asteroid 1160 Illyria – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1160+Illyria#Asteroid%201160%20IllyriaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 https://web.archive.org/web/20200819144043/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1160+Illyria#Asteroid%201160%20IllyriaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 19 August 2020 dead 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 1160 29 November 2017 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 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 29 November 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 free (online, AcuA catalog p. 153) 6 M.-J. Kim Y.-J. Choi H.-K. Moon Y.-I. Byun N. Brosch M. Kaplan S. Kaynar Ö Uysal E. Güzel R. Behrend J.-N. Yoon S. Mottola S. Hellmich T. C. Hinse Z. Eker J.-H. Park March 2014 Rotational Properties of the Maria Asteroid Family http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014AJ....147...56K The Astronomical Journal 147 3 15 2014AJ....147...56K 10.1088/0004-6256/147/3/56 29 November 2017 1311.5318 6 J. Hanus M. Broz J. Durech B. D. Warner J. Brinsfield R. Durkee D. Higgins R. A. Koff J. Oey F. Pilcher R. Stephens L. P. Strabla Q. Ulisse R. Girelli November 2013 An anisotropic distribution of spin vectors in asteroid families Astronomy and Astrophysics 559 19 2013A&A...559A.134H 10.1051/0004-6361/201321993 1309.4296 6 Craig Bennefeld Stephen Bass Ricco Blair Kendrick Cunningham Da'quia Hill Michael McHenry Lerone Maxwell October 2009 Asteroid Lightcurve Analysis at Ricky Observatory http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2009MPBu...36..147B The Minor Planet Bulletin 36 4 147–148 1052-8091 2009MPBu...36..147B 29 November 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 29 November 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 1160 1159 Granada 1160 1161 Thessalia 001160 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19290909