1431 Luanda

Asteroid October 2019 yes 1431 Luanda #D6D6D6 File:001431-asteroid shape model (1431) Luanda.png Modelled shape of Luanda from its lightcurve C. Jackson Johannesburg 29 July 1937 (1431) Luanda 1937 OB1949 KZ Luanda(Capital of Angola) main-belt(middle)Eunomia 4 September 2017 (JD 2458000.5) 0 80.22 yr (29,300 days) 3.0989 AU 2.1408 AU 2.6199 AU 0.1829 4.24 yr (1,549 days) 293.57° 0.2324 ms / day 13.987° 117.73° 224.19° 13.608 1.966 km13.88 km (calculated) 4.141 0.004 h5.360 0.002 h 0.21 (assumed)0.360 0.347 LS S (assumed) 11.0611.611.712.38 0.42 1431 Luanda, provisional designation 1937 OB, is a stony Eunomian asteroid from the central regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered on 29 July 1937, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named after the city of Luanda. Orbit and classification Luanda is a member of the Eunomia family (502), a prominent family of stony S-type asteroid and the largest one in the intermediate main belt with more than 5,000 members.23 It orbits the Sun in the central asteroid belt at a distance of 2.1–3.1 AU once every 4 years and 3 months (1,549 days). Its orbit has an eccentricity of 0.18 and an inclination of 14° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Johannesburg in 1937. Physical characteristics Luanda has been characterized as a L/S-type asteroid by Pan-STARRS photometric survey. The LCDB assumes it to be a common stony S-type asteroid, in-line with the family's overall spectral type.23 Rotation period In December 1997, a rotational lightcurve of Luanda was obtained from photometric observations at the Félix Aguilar Observatory in Argentina . Lightcurve analysis gave a rotation period of 5.360 hours with a brightness variation of 1.0 magnitude (U=2). In January 2007, French amateur astronomer René Roy obtained a period of 4.141 hours with an amplitude of 0.77 magnitude (U=9-). A high brightness amplitude indicates that the body has an elongated rather than spherical shape. Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Luanda measures 13.61 kilometers in diameter and its surface has an albedo of 0.36. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for Eunomian asteroids of 0.21 – derived from 15 Eunomia, the parent body of this family – and calculates a diameter of 13.88 kilometers based on an absolute magnitude of 11.6. Naming This minor planet was named after the city of Luanda, capital of Angola. The official naming citation was published by the Minor Planet Center on 1 February 1980 (M.P.C. 5182). References 30em 2017-09-30 last obs. JPL Small-Body Database Browser: 1431 Luanda (1937 OB) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001431 Jet Propulsion Laboratory 24 October 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 115 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1432 (1431) Luanda 1431 Luanda (1937 OB) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1431 24 October 2017 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 24 October 2017 Asteroids and comets rotation curves – (1431) Luanda Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001431 24 October 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001431 dead Asteroid 1431 Luanda – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1431+Luanda#Asteroid%201431%20LuandaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 October 2026 InternetArchiveBot 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 9780816532131 1431 24 October 2017 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri C. Nugent M. S. Cabrera November 2012 Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M The Astrophysical Journal Letters 759 1 5 2012ApJ...759L...8M 10.1088/2041-8205/759/1/L8 1209.5794 24 October 2017 R. Gil-Hutton Cañ M. ada April 2003 Photometry of Fourteen Main Belt Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2003RMxAA..39...69G Revista Mexicana de Astronomía y Astrofísica 39 69–76 2003RMxAA..39...69G 24 October 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 Icarus 261 34–47 2015Icar..261...34V 10.1016/j.icarus.2015.08.007 1506.00762 https://pure.qub.ac.uk/portal/en/publications/absolute-magnitudes-and-slope-parameters-for-250000-asteroids-observed-by-panstarrs-ps1--preliminary-results(b84b1999-a9a5-4c46-96d1-60ce154b521e).html 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 1431 1430 Somalia 1431 1432 Ethiopia 001431 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 19370729