1268 Libya

Hildian asteroid October 2019 yes 1268 Libya #D6D6D6 C. Jackson Johannesburg Obs. 29 April 1930 (1268) Libya 1930 HJ1929 EA1930 KN Libya (country) main-belt(outer)Hilda 4 September 2017 (JD 2458000.5) 0 87.09 yr (31,811 days) 4.3787 AU 3.5686 AU 3.9737 AU 0.1019 7.92 yr (2,893 days) 157.54° 0.1244 ms / day 4.4272° 351.00° 119.43° 0.7451 AU 93.44 1.42 km94.10 2.3 km96.708 0.848 km 14.05 h14.05008 h 0.043 0.0030.0449 0.0020.046 0.002 Tholen PB–V 0.663U–B 0.228 9.129.19 0.33 1268 Libya, provisional designation 1930 HJ, is a dark Hildian asteroid from the outer regions of the asteroid belt, approximately 95 kilometers in diameter. It was discovered on 29 April 1930, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg, South Africa. The asteroid was named for the country Libya. Orbit and classification Libya belongs to the dynamical Hilda group of asteroids, which reside in, or closely inside the 3:2 orbital resonance with the giant planet Jupiter at 4.0 AU. However, the asteroid belongs to the background population as it is not a member of any known asteroid family within the Hildian dynamical group. Libya orbits the Sun in the outer main-belt at a distance of 3.6–4.4 AU once every 7 years and 11 months (2,893 days). Its orbit has an eccentricity of 0.10 and an inclination of 4° with respect to the ecliptic. The asteroid was first identified as 1929 EA at Uccle Observatory in March 1929, and its observation arc begins with its official discovery observation at Johannesburg in 1930. Physical characteristics In the Tholen classification, Libya is a primitive P-type asteroid. Rotation period In June 1994, a rotational lightcurve of Libya was obtained from photometric observations by Swedish astronomer Mats Dahlgren (see 6945 6945) at ESO's La Silla Observatory using the Dutch 0.9-metre Telescope. Lightcurve analysis gave a well-defined rotation period of 14.05 hours with a brightness variation of 0.08 magnitude (U=3). In October 2011, observations by French amateur astronomer René Roy also gave a period of 14.05 hours and a low amplitude of 0.06 magnitude (U=n.a.). A low brightness amplitude typically indicates that the body has a spheroidal rather than an elongated or irregular shape. 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 Wide-field Infrared Survey Explorer, Libya measures between 93.44 and 96.708 kilometers in diameter and its surface has an albedo between 0.043 and 0.046. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0449 and a diameter of 94.10 kilometers based on an absolute magnitude of 9.12. Between 2018 and 2021, 1268 Libya has been observed to occult three stars. Naming This minor planet was named after the North African country of Libya, bordering the Mediterranean Sea. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 116). References 30em 2017-06-02 last obs. JPL Small-Body Database Browser: 1268 Libya (1930 HJ) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001268 Jet Propulsion Laboratory 19 September 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 105 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1269 (1268) Libya 1268 Libya (1930 HJ) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1268 19 September 2017 Asteroids and comets rotation curves – (1268) Libya Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001268 19 September 2017 23 April 2019 https://web.archive.org/web/20190423121547/http://obswww.unige.ch/~behrend/page3cou.html#001268 dead 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 19 September 2017 Asteroid 1268 Libya – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1268 29 October 2019 1268 19 September 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 (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 6 M. Dahlgren J. F. Lahulla C.-I. Lagerkvist J. Lagerros S. Mottola A. Erikson M. Gonano-Beurer M. Di Martino June 1998 A Study of Hilda Asteroids. V. Lightcurves of 47 Hilda Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1998Icar..133..247D Icarus 133 2 247–285 1998Icar..133..247D 10.1006/icar.1998.5919 19 September 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 53493339 19 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 1268 1267 Geertruida 1268 1269 Rollandia 001268 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 001268 19300429