1244 Deira

Main-belt asteroid October 2019 yes 1244 Deira #D6D6D6 001244-asteroid shape model (1244) Deira.png Modelled shape of Deira from its lightcurve C. Jackson Johannesburg Obs. 25 May 1932 (1244) Deira 1932 KE1930 YR1984 YQ 6A908 TDA921 GCA924 BH ' d aɪ r @ DY rə or ' d eɪr @ DAIR əA Complete Pronouncing Gazetteer, Or, Geographical Dictionary of the World, 1880 Deira, near the town of Ossett, England(alt. Celtic Kingdom of Deira) main-belt(inner) background 4 September 2017 (JD 2458000.5) 0 109.13 yr (39,861 days) 2.5731 AU 2.1129 AU 2.3430 AU 0.0982 3.59 yr (1,310 days) 335.23° 0.2748 ms / day 8.6950° 277.12° 261.45° 28.816 0.546 km30.432 9.136 km30.95 1.9 km31.799 0.487 km32.28 0.35 km33.15 7.01 km35.19 0.19 km 5 (poor) h210.6 0.1 hlcdb-Oey-2011216.98 0.05 h217.1 0.1 hOey-2011-website (314.0°, −46.0°) (λ1/β1) (107.0°, −56.0°) (λ2/β2) 0.03 0.000.0357 0.00510.037 0.0110.0416 0.03120.052 0.0010.0557 0.007 X (S3OS2) P (WISE) 11.3011.50 1244 Deira (prov. designation: 1932 KE) is a dark background asteroid and slow rotator from the inner region of the asteroid belt. The X-type asteroid has an exceptionally long rotation period of 210.6 hours and measures approximately 31 km mi off 2 us in diameter. It was discovered on 25 May 1932, by English-born South African astronomer Cyril Jackson at the Union Observatory in Johannesburg, who named it after Deira, an old kingdom near his birthplace, the market town of Ossett, located in West Yorkshire, England. Orbit and classification Deira is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It orbits the Sun in the inner asteroid belt at a distance of 2.1–2.6 AU once every 3 years and 7 months (1,310 days; semi-major axis 2.34 AU). Its orbit has an eccentricity of 0.10 and an inclination of 9° with respect to the ecliptic. The body's observation arc begins with its first observations as A908 TD at Heidelberg Observatory in October 1908, or more than 23 years prior to its official discovery observation at Johannesburg. Naming This minor planet was named by the discoverer Cyril Jackson after his birthplace, the market town of Ossett, located in West Yorkshire, England (also see 2193 2193 Jackson). The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 115). While the naming citation reads that Deira is the ancient name for his birthplace, the Celtic Kingdom of Deira was actually much larger, encompassing at its height most of Yorkshire in Northern England. Physical characteristics Deira has been characterized as a primitive P-type asteroid by the space-based Wide-field Infrared Survey Explorer (WISE). While P-type bodies are common in the outermost asteroid belt and among the Jupiter trojans, they are rarely found in the inner main belt. In both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), Deira is an X-type asteroid. Rotation period In March 2011, a rotational lightcurve of Deira was obtained from photometric observations by Julian Oey at his Leura Observatory (E17) in Australia. Lightcurve analysis gave a rotation period of 210.6 hours with a brightness variation of 0.5 magnitude (U=2),lcdb-Oey-2011 while Oey previously published a slightly longer period of 217.1 hours and an amplitude of 0.6 magnitude (U=n.a.).Oey-2011-website This makes Deira one of the Top 300 slow rotators known to exist. Spin axis In 2016, an international study modeled a lightcurve with a concurring period of 216.98 hours and found two spin axis of (314.0°, −46.0°) and (107.0°, −56.0°) in ecliptic coordinates (λ, β). 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 WISE telescope, Deira measures between 28.816 and 35.19 kilometers in diameter and its surface has an albedo between 0.03 and 0.0557. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0465 and a diameter of 30.89 kilometers based on an absolute magnitude of 11.5. Notes lcdb-Oey-2011 Oey (2011) LCDB. (1244) Deira – rotation period 210.6 0.1 hours with a brightness amplitude of 0.50 0.03 mag. Quality code of 2. Summary figures at the LCDB. Oey-2011-website Oey (2007) website. (1244) Deira – rotation period 217.1 0.1 hours with a brightness amplitude of 0.60 0.05 mag. No quality code. Lightcurve-plot and summary figures at the archived Leura Observatory website. Astronomers comment: "The data is re-reduced with Canopus 9.5 Comp Star Selector feature. Linkage over the 2.5 months period showing a main period of 217h. Slow rotator with deviation from the mean due to Psyn-sid and tumbling characteristics." References 30em 2017-11-25 last obs. JPL Small-Body Database Browser: 1244 Deira (1932 KE) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001244 https://web.archive.org/web/20200819210708/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001244 19 August 2020 Jet Propulsion Laboratory 3 January 2018 Dictionary of Minor Planet Names Schmadel Lutz D. Springer Berlin Heidelberg (1244) Deira 103 2007 10.1007/978-3-540-29925-7_1245 978-3-540-00238-3 1244 Deira (1932 KE) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1244 3 January 2018 Asteroids and comets rotation curves – (1244) Deira Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001244 3 January 2018 23 April 2019 https://web.archive.org/web/20190423121547/http://obswww.unige.ch/~behrend/page3cou.html#001244 dead 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 3 January 2018 1244 3 January 2018 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 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 Joseph R. Masiero C. Nugent A. K. Mainzer E. L. Wright J. M. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett October 2017 NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos The Astronomical Journal 154 4 10 2017AJ....154..168M 10.3847/1538-3881/aa89ec 1708.09504 free 6 C. R. Nugent A. Mainzer J. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. Wright December 2015 NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 9341381 3 January 2018 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 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 J. Hanus J. Durech D. A. Oszkiewicz R. Behrend B. Carry M. Delbo O. Adam V. Afonina R. Anquetin P. Antonini L. Arnold M. Audejean P. Aurard M. Bachschmidt B. 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Wolf February 2016 New and updated convex shape models of asteroids based on optical data from a large collaboration network Astronomy and Astrophysics 586 24 2016A&A...586A.108H 10.1051/0004-6361/201527441 1510.07422 119112278 Asteroid 1244 Deira – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1244 29 October 2019 Asteroid 1244 Deira Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1244+Deira 15 March 2020 https://web.archive.org/web/20200819223703/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1244+Deira 19 August 2020 dead D. Lazzaro C. A. Angeli J. M. Carvano T. Mothé-Diniz R. Duffard M. Florczak November 2004 S3OS2: the visible spectroscopic survey of 820 asteroids http://sirrah.troja.mff.cuni.cz/yarko-site/tmp/eos/NEW/spectral_type_figure/s3os2.pdf Icarus 172 1 179–220 2004Icar..172..179L 10.1016/j.icarus.2004.06.006 15 March 2020 External links Lightcurve Database Query (LCDB), at www.minorplanet.info 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 – Geneva Observatory, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1244 1243 Pamela 1244 1245 Calvinia 001244 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 001244 19320525