1280 Baillauda

Main-belt asteroid October 2019 yes 1280 Baillauda #D6D6D6 E. Delporte Uccle Obs. 18 August 1933 (1280) Baillauda 1933 QB1931 HE1946 SF1959 UK1961 ANA912 GB Jules Baillaud(French astronomer) main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 84.12 yr (30,725 days) 3.5842 AU 3.2431 AU 3.4136 AU 0.0500 6.31 yr (2,304 days) 61.729° 0.1563 ms / day 6.4598° 293.06° 98.986° 50.83 2.0 km53.97 0.72 km 12.6 h 0.045 0.0010.0505 0.004 Tholen XP (derived from Tholen)B–V 0.671U–B 0.360 9.99 0.2210.33 1280 Baillauda, provisional designation 1933 QB, is a dark background asteroid from the outermost region of the asteroid belt, approximately 52 kilometers in diameter. Discovered by Eugène Delporte at Uccle Observatory in 1933, the asteroid was named after French astronomer Jules Baillaud. Discovery Baillauda was discovered by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle on 18 August 1933. On the following night, it was independently discovered by Soviet astronomer Grigory Neujmin at Simeiz Observatory on the Crimean peninsula. The Minor Planet Center only recognizes the first discoverer. The asteroid was first identified as A912 GB at Heidelberg Observatory in April 1912. The body's observation arc begins with its official discovery observation at Uccle in August 1933. Orbit and classification Baillauda is a non-family asteroid from the main belt's background population. It orbits the Sun in the outer asteroid belt at a distance of 3.2–3.6 AU once every 6 years and 4 months (2,304 days; semi-major axis of 3.41). Its orbit has an eccentricity of 0.05 and an inclination of 6° with respect to the ecliptic. Physical characteristics In the Tholen classification, Baillauda is an X-type asteroid. The Lightcurve Data Base amends this Tholen spectral type and derives a primitive P-type based on the asteroid's low albedo (see below). Rotation period In August 1990, a rotational lightcurve of Baillauda was obtained from photometric observations by Swedish astronomer Claes-Ingvar Lagerkvist in a collaboration with other European astronomers. The observations were taken with the 1.5-meter telescope at the Loiano Observatory in Italy (598). Lightcurve analysis gave a rotation period of 12.6 hours with a brightness amplitude of 0.25 magnitude (U=2). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS and the Japanese Akari satellite, Baillauda measures 50.83 and 53.97 kilometers in diameter and its surface has an albedo of 0.0505 and 0.045, respectively. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is an albedo of 0.0505 and a diameter of 50.83 kilometers based on an absolute magnitude of 10.33. Naming This minor planet was named after French astronomer Jules Baillaud (1876–1960), who led the Pic du Midi Observatory in the French Pyrenees (1937–1947), after his stay at the observatories at Paris and Lyons (513). Jules was the son of prolific astronomer Benjamin Baillaud (1848–1934), after whom the lunar crater Baillaud was named. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 117). References 30em 2017-10-01 last obs. JPL Small-Body Database Browser: 1280 Baillauda (1933 QB) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001280 Jet Propulsion Laboratory 7 November 2017 Dictionary of Minor Planet Names – (1280) Baillauda Schmadel Lutz D. Springer Berlin Heidelberg 105 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1281 (1280) Baillauda 1280 Baillauda (1933 QB) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1280 7 November 2017 Asteroid 1280 Baillauda – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1280 29 October 2019 1280 7 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 (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 C.-I. Lagerkvist A. Erikson H. Debehogne L. Festin P. Magnusson S. Mottola T. Oja G. de Angelis I. N. Belskaya M. Dahlgren M. Gonano-Beurer J. Lagerros K. Lumme S. Pohjolainen October 1995 Physical studies of asteroids. XXIX. Photometry and analysis of 27 asteroids. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1995A&AS..113..115L Astronomy and Astrophysics Supplement 113 115 1995A&AS..113..115L 7 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 7 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 1280 1279 Uganda 1280 1281 Jeanne 001280 Category:Discoveries by Eugène Joseph Delporte Category:Named minor planets 001280 19330818