1555 Dejan

Asteroid from the background population of the central regions of the asteroid belt October 2019 yes 1555 Dejan #D6D6D6 001555-asteroid shape model (1555) Dejan.png Shape model of Dejan from its lightcurve F. Rigaux Uccle Obs. 15 September 1941 (1555) Dejan 1941 SA1932 PC1934 CD 11954 NJ Dejan Đurković (son of astronomer Petar Đurković) main-belt(middle) 4 September 2017 (JD 2458000.5) 0 84.64 yr (30,913 days) 3.4332 AU 1.9442 AU 2.6887 AU 0.2769 4.41 yr (1,610 days) 71.768° 0.2236 ms / day 6.0200° 318.08° 47.825° 19.21 km (calculated)21.77 7.25 km23.199 0.314 km24.04 0.48 km 16.960 0.002 h 0.053 0.0060.0531 0.00560.068 0.0030.08 0.090.10 (assumed)lcdb-readme S/Clcdb-readme 11.6511.70 1555 Dejan (provisional designation 1941 SA) is an asteroid from the background population of the central regions of the asteroid belt, approximately 22 kilometers in diameter. It was discovered on 15 September 1941, by Belgian astronomer Fernand Rigaux at the Royal Observatory of Belgium in Uccle. The asteroid was named after Dejan Đurković, son of Serbian astronomer Petar Đurković. Orbit and classification Dejan is a non-family asteroid from the main belt's background population. It orbits the Sun in the central asteroid belt at a distance of 1.9–3.4 AU once every 4 years and 5 months (1,610 days). Its orbit has an eccentricity of 0.28 and an inclination of 6° with respect to the ecliptic. The body's observation arc begins with its first identification as 1932 PC at Johannesburg Observatory in August 1932, more than 9 years prior to its official discovery observation at Uccle. Naming This minor planet was named after Dejan Đurković, son of Petar Đurković (1908–1981), a Serbian astronomer and discoverer of minor planets at the Belgrade Observatory. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 137). Physical characteristics Rotation period In September 2016, a rotational lightcurve of Dejan was obtained from photometric observations by the Spanish amateur astronomer group OBAS. Lightcurve analysis gave a rotation period of 16.960 hours with a brightness variation of 0.41 magnitude (U=2+). Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Dejan measures 21.77 and 23.199 kilometers in diameter and its surface has an albedo of 0.053 and 0.08, respectively, while the Japanese Akari satellite found a diameter of 24.04 kilometers with an albedo of 0.068. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 – a compromise value between the darker C-type and brighter S-type asteroids – and calculates a diameter of 19.21 kilometers based on an absolute magnitude of 11.7.lcdb-readme Notes lcdb-readme For central-belt asteroids with 2.6 < a < 2.7, the LCDB assumes an "S/C" class with an albedo of 0.10, a compromise between the stony (p=0.20) and carbonaceous (p=0.057) asteroids, see LCDB readme References 30em 2017-03-21 last obs. JPL Small-Body Database Browser: 1555 Dejan (1941 SA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001555 Jet Propulsion Laboratory 20 September 2017 Dictionary of Minor Planet Names – (1555) Dejan Schmadel Lutz D. Springer Berlin Heidelberg 123 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1556 (1555) Dejan 1555 Dejan (1941 SA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1555 20 September 2017 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri J. Dailey P. R. M. Eisenhardt R. S. McMillan T. B. Spahr M. F. Skrutskie D. Tholen R. G. Walker E. L. Wright E. DeBaun D. Elsbury T. IV Gautier S. Gomillion A. Wilkins November 2011 Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M The Astrophysical Journal 741 2 20 2011ApJ...741...68M 10.1088/0004-637X/741/2/68 1109.4096 118745497 20 September 2017 1555 20 September 2017 6 C. R. Nugent A. Mainzer J. Bauer R. M. Cutri E. A. Kramer T. Grav J. Masiero S. Sonnett E. L. Wright September 2016 NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos The Astronomical Journal 152 3 12 2016AJ....152...63N 10.3847/0004-6256/152/3/63 1606.08923 free 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 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 Pedro Brines Juan Lozano Onofre Rodrigo A. Fornas David Herrero Vicente Mas G. Fornas A. Carreñ Enrique Arce April 2017 Sixteen Asteroids Lightcurves at Asteroids Observers (OBAS) - MPPD: 2016 June–November http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017MPBu...44..145B The Minor Planet Bulletin 44 2 145–149 1052-8091 2017MPBu...44..145B 20 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 1555 1554 Yugoslavia 1555 1556 Wingolfia 001555 Category:Discoveries by Fernand Rigaux Category:Named minor planets 19410915