1194 Aletta

Main-belt asteroid October 2019 yes 1194 Aletta #D6D6D6 13 May 1931 C. Jackson Johannesburg Obs. (1194) Aletta 1931 JG1946 KC1962 SB Aletta Jackson(discoverer's wife) main-belt(outer) 16 February 2017 (JD 2457800.5) 0 85.07 yr (31,072 days) 3.1812 AU 2.6452 AU 2.9132 AU 0.0920 4.97 yr (1,816 days) 138.73° 0.1982 ms / day 10.870° 291.32° 243.18° 41.358 0.191 km42.67 0.77 km46.371 1.188 km55.22 20.92 km55.23 km (derived)55.39 1.4 km 19.7 0.1 h20.39 0.01 h20.3903 0.2170 h 0.03 0.030.0333 (derived)0.0375 0.00650.0479 0.0030.085 0.0040.087 0.011 C 10.210.510.610.644 0.001 (R) 1194 Aletta, provisional designation 1931 JG, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 55 kilometers in diameter. It was discovered on 13 May 1931, by South African astronomer Cyril Jackson at Johannesburg Observatory in South Africa. It was later named after the discoverer's wife Aletta Jackson. Classification and orbit Aletta is a dark C-type asteroid and orbits the Sun at a distance of 2.6–3.2 AU once every 4 years and 12 months (1,816 days). Its orbit has an eccentricity of 0.09 and an inclination of 11° with respect to the ecliptic. The body's observation arc begins at Johannesburg, one week after its official discovery observation. No precoveries were taken and no prior identifications were made. Physical characteristics Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Aletta measures between 41.358 and 55.39 kilometers in diameter, and its surface has an albedo between 0.03 and 0.87. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0333 and a diameter of 55.23 kilometers based on an absolute magnitude of 10.6. Rotation period In November 2007, American astronomer James W. Brinsfield obtained the first ever lightcurve of Aletta with period of 19.7 hours and a brightness variation of 0.32 magnitude at Via Capote Observatory (U=2). Two more lightcurves were obtained by Australian astronomer Julian Oey at Leura/Kingsgrove Observatory in March 2010, and by the Survey conducted at the Palomar Transient Factory, California, in October 2012. Lightcurve analysis gave a concurring rotation period of 20.39 and 20.3903 hours with an amplitude of 0.28 and 0.27 magnitude, respectively (U=2+/2). Naming The discoverer named this minor planet for his wife, Aletta Jackson (née Maria Aletta Lessing). Naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 111). References 2016-06-14 last obs. JPL Small-Body Database Browser: 1194 Aletta (1931 JG) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001194 Jet Propulsion Laboratory 1 February 2017 Dictionary of Minor Planet Names – (1194) Aletta Schmadel Lutz D. Springer Berlin Heidelberg 100 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1195 (1194) Aletta 1194 Aletta (1931 JG) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1194 1 February 2017 6 Joseph R. Masiero T. Grav A. K. Mainzer C. R. Nugent J. M. Bauer R. Stevenson S. Sonnett August 2014 Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 1 February 2017 1194 1 February 2017 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 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 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 1 February 2017 Brinsfield, James W. June 2008 The Rotation Periods of 531 Zerlina, 1194 Aleta 1352 Wawel, 2005 Hencke, 2648 Owa, and 3509 Sanshui http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35...86B The Minor Planet Bulletin 35 2 86–87 1052-8091 2008MPBu...35...86B 1 February 2017 Oey, Julian October 2011 Lightcurve Analysis of Asteroids from Leura and Kingsgrove Observatory for the Second Half of 2009 and 2010 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011MPBu...38..221O The Minor Planet Bulletin 38 4 221–223 1052-8091 2011MPBu...38..221O 1 February 2017 6 Adam Waszczak Chan-Kao Chang Eran O. Ofek Russ Laher Frank Masci David Levitan Jason Surace Yu-Chi Cheng Wing-Huen Ip Daisuke Kinoshita George Helou Thomas A. Prince Shrinivas Kulkarni September 2015 Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W The Astronomical Journal 150 3 35 2015AJ....150...75W 10.1088/0004-6256/150/3/75 1504.04041 1 February 2017 Gerard Faure Lawrence Garrett October 2009 Suggested Revised H Values of Selected Asteroids: Report Number 4 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2009MPBu...36..140F The Minor Planet Bulletin 36 4 140–143 1052-8091 2009MPBu...36..140F 1 February 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 1194 1193 Africa 1194 1195 Orangia 001194 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 19310513