1800 Aguilar

Stony main-belt asteroid October 2019 yes 1800 Aguilar #D6D6D6 12 September 1950 M. Itzigsohn La Plata Obs. (1800) Aguilar 1950 RJ1952 BJ1972 XP 21976 YU 71977 AE 1 Félix Aguilar (astronomer) main-beltVestian 4 September 2017 (JD 2458000.5) 0 66.54 yr (24,305 days) 2.6778 AU 2.0362 AU 2.3570 AU 0.1361 3.62 yr (1,322 days) 189.20° 0.2724 ms / day 5.7893° 124.24° 214.46° 7.384 0.156 km8.18 km (calculated) 2.478 0.002 hLCDB-Higgins-2011 0.20 (assumed)0.295 0.047 S 12.612.813.07 0.05 1800 Aguilar, provisional designation 1950 RJ, is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 12 September 1950, by Argentine astronomer Miguel Itzigsohn at La Plata Astronomical Observatory in Argentina. The asteroid was named after Argentine astronomer Félix Aguilar. Orbit and classification The stony S-type asteroid is a member of the Vesta family. It orbits the Sun in the inner main-belt at a distance of 2.0–2.7 AU once every 3 years and 7 months (1,322 days). Its orbit has an eccentricity of 0.14 and an inclination of 6° with respect to the ecliptic. As no precoveries were taken, and no prior identifications were made, Aguilars observation arc begins with its official discovery observation. Physical characteristics Rotation period In September 2008, a rotational lightcurve of Aguilar was obtained from photometric observations taken by Australian amateur astronomer David Higgins. It gave a well-defined rotation period of 2.478 hours with a brightness variation of 0.11 in magnitude (U=3).LCDB-Higgins-2011 Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Aguilar measures 7.38 kilometers in diameter, and its surface has an albedo of 0.295, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 8.18 kilometers with an absolute magnitude of 12.8. Naming This minor planet was named for Argentine astronomer Félix Aguilar (1884–1943), former director of the discovering observatory and founder of the University School of Astronomy and Geophysics. He contributed significantly to the development of Argentine astronomy in the first half of the 20th century (also see Félix Aguilar Observatory). The official 1800 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3934). Notes LCDB-Higgins-2011 Higgins (2011) web: rotation period 2.478 0.002 hours with a brightness amplitude of 0.11 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1800) Aguilar and David Higgins Homepage References 30em 2017-03-29 last obs. JPL Small-Body Database Browser: 1800 Aguilar (1950 RJ) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001800 https://web.archive.org/web/20161220170255/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001800 20 December 2016 Jet Propulsion Laboratory 8 June 2017 Dictionary of Minor Planet Names – (1800) Aguilar Schmadel Lutz D. Springer Berlin Heidelberg 144 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1801 (1800) Aguilar 1800 Aguilar (1950 RJ) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1800 19 December 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 1800 19 December 2016 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 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 19 December 2016 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 19 December 2016 External links asteroid light-curves, Higgins, D.J. (per 20 March 2015) 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 1800 1799 Koussevitzky 1800 1801 Titicaca 001800 Category:Discoveries by Miguel Itzigsohn Category:Named minor planets 19500912