1400 Tirela

Main-belt asteroid October 2019 yes 1400 Tirela #D6D6D6 001400-asteroid shape model (1400) Tirela.png Modelled shape of Tirela from its lightcurve L. Boyer Algiers Obs. 17 November 1936 (1400) Tirela 1936 WA1930 UQ Charles Tirel(discoverer's friend) main-belt(outer)Tirela 4 September 2017 (JD 2458000.5) 0 86.96 yr (31,762 days) 3.8513 AU 2.4001 AU 3.1257 AU 0.2322 5.53 yr (2,018 days) 316.88° 0.1784 ms / day 15.631° 210.10° 111.65° 14.67 0.62 km 15.697 0.285 km 13.356 h (58.0°, −80.0°) (λ1/β1) (297.0°, −41.0°) (λ2/β2) 0.216 0.0310.2165 0.03090.227 0.022 C (assumed) 11.311.411.50 1400 Tirela (provisional designation 1936 WA) is an asteroid and the parent body of the Tirela family, located in the outer regions of the asteroid belt. It was discovered on 17 November 1936, by French astronomer Louis Boyer at the Algiers Observatory in North Africa. The asteroid has a rotation period of 13.4 hours and measures approximately 16 km mi off 2 us in diameter. It was named after Charles Tirel, a friend of the discoverer. Orbit and classification Tirela is the parent body of the Tirela family, a fairly large asteroid family, also known as the Klumpkea family, after its largest member 1040 Klumpkea.23 It orbits the Sun in the outer main belt at a distance of 2.4–3.9 AU once every 5 years and 6 months (2,018 days). Its orbit has an eccentricity of 0.23 and an inclination of 16° with respect to the ecliptic. The asteroid was first identified as 1930 UQ at Lowell Observatory in October 1930. The body's observation arc also begins at Lowell Observatory, with a precovery taken the night before its first identification. Naming This minor planet was named after Charles Tirel a friend of discoverer Louis Boyer- The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 127). Physical characteristics In both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), Tirela is a dark D-type asteroid. Conversely, the overall spectral type of the Tirela family is that of an S-type which agrees with the determined albedo (see below) by WISE and Akari.23 Rotation period and poles In the early 2000s, a rotational lightcurve of Tirela was obtained from photometric observations by a group of Hungarian astronomers. Lightcurve analysis gave a rotation period of 13.356 hours with a brightness amplitude of 0.55 magnitude (U=2), superseding the result from a previous observation that gave a period of 8 hours.lcdb-Behrend-web-2001 A 2016-published lightcurve, using modeled photometric data from the Lowell Photometric Database, gave a concurring sidereal period of 13.35384 0.00001 hours, as well as two spin axis of (58.0°, −80.0°) and (297.0°, −41.0°) 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 WISE telescope, Tirela measures between 14.67 and 15.697 kilometers in diameter and its surface has an albedo between 0.216 and 0.227. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 29.21 kilometers based on an absolute magnitude of 11.4. Notes lcdb-Behrend-web-2001 Lightcurve (not published) on Behrend website from 2001-07-03: rotation period 8 hours with a brightness amplitude of 0.25 mag. Quality code of 2. Summary figures for (1400) Tirela at LCDB References 30em 2017-09-30 last obs. JPL Small-Body Database Browser: 1400 Tirela (1936 WA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001400 Jet Propulsion Laboratory 25 October 2017 Dictionary of Minor Planet Names https://archive.org/details/dictionaryminorp00schm limited Schmadel Lutz D. Springer Berlin Heidelberg (1400) Tirela 113 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1401 1400 Tirela (1936 WA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1400 25 October 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 25 October 2017 Asteroid 1400 Tirela – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1400+Tirela#Asteroid%201400%20TirelaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 https://web.archive.org/web/20200820025757/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1400+Tirela#Asteroid%201400%20TirelaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 20 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 978-0-8165-3213-1 1400 25 October 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) 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 P. Székely L. L. Kiss Gy. M. Szabó K. Sárneczky B. Csák M. Váradi Sz. Mészáros August 2005 CCD photometry of 23 minor planets Planetary and Space Science 53 9 925–936 2005P&SS...53..925S 10.1016/j.pss.2005.04.006 astro-ph/0504462 J. Durech J. Hanus D. Oszkiewicz R. Vanco March 2016 Asteroid models from the Lowell photometric database http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...587A..48D Astronomy and Astrophysics 587 6 2016A&A...587A..48D 10.1051/0004-6361/201527573 1601.02909 25 October 2017 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 16 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 1400 1399 Teneriffa 1400 1401 Lavonne 001400 Category:Discoveries by Louis Boyer (astronomer) Category:Named minor planets 19361117