1319 Disa

Main-belt asteroid October 2019 yes 1319 Disa #D6D6D6 19 March 1934 C. Jackson Johannesburg Obs. (1319) Disa 1934 FO1929 GE1970 FMA908 EA ' d ai s @disa Disa (orchid – flowering plant) main-belt(outer) 4 September 2017 (JD 2458000.5) 0 109.20 yr (39,885 days) 3.6026 AU 2.3684 AU 2.9855 AU 0.2067 5.16 yr (1,884 days) 41.069° 0.1911 ms / day 2.8007° 256.10° 316.25° 16.88 1.12 km24.00 0.37 km25.651 0.321 km25.894 0.180 km40.33 km (calculated) 7.080 0.003 hlightcurve-plot7.082 0.001 h7.0820 0.0077 h 0.057 (assumed)0.0959 0.00340.097 0.0120.116 0.0040.391 0.038 PC 10.391 0.002 (R)10.5010.711.1 1319 Disa, provisional designation 1934 FO, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 25 kilometers in diameter. It was discovered on 19 March 1934, by English-born, South African astronomer Cyril Jackson at Johannesburg Observatory in South Africa. It is named for the orchid Disa. Orbit Disa orbits the Sun in the outer main-belt at a distance of 2.4–3.6 AU once every 5 years and 2 months (1,884 days). Its orbit has an eccentricity of 0.21 and an inclination of 3° with respect to the ecliptic. It was first identified as A908 EA at Heidelberg Observatory in 1908. The body's observation arc begins in 1929, when it was identified as 1929 GE at the discovering observatory, 6 years prior to its official discovery observation. Physical characteristics Rotation period A rotational lightcurve of Disa was obtained by American astronomer Brian D. Warner at his Palmer Divide Observatory in March 2006, and by French amateur astronomer Pierre Antonini in February 2011, respectively. Analysis of both lightcurves gave a well-defined rotation period of 7.08 hours with a brightness variation of 0.26 and 0.27 magnitude (U=3/3).lightcurve-plot In September 2013, photometric observations in the R-band at the Palomar Transient Factory gave a concurring lightcurve of 7.082 hours and an amplitude of 0.24 magnitude (U=2). Diameter, albedo and spectral type According to the surveys carried out by the Japanese Akari satellite, and the 2014-results by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Disa measures 24.00 and 25.65 kilometers in diameter, and its surface has an albedo of 0.116 and 0.097, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous C-type asteroids of 0.057 and calculates a diameter of 40.33 kilometers with an absolute magnitude of 10.7. Preliminary results by NEOWISE also characterized the body as a dark and reddish P-type asteroid. Naming This minor planet was named after Disa, also known as "African weed-orchid", a large genus of more than a hundred tropical orchids, common in southern Africa. In 1955, this naming citation was also published by Paul Herget in The Names of the Minor Planets (H 120). Notes lightcurve-plot Lightcurve plot of 1319 Disa, Palmer Divide Observatory, Brian D. Warner (2006) References 30em 2017-06-05 last obs. JPL Small-Body Database Browser: 1319 Disa (1934 FO) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001319 Jet Propulsion Laboratory 25 July 2017 Dictionary of Minor Planet Names – (1319) Disa Schmadel Lutz D. Springer Berlin Heidelberg 108 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1320 (1319) Disa 1319 Disa (1934 FO) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1319 16 January 2017 Asteroids and comets rotation curves – (1319) Disa Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001319 16 January 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001319 dead 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 16 January 2017 1319 16 January 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 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 16 January 2017 Warner, Brian D. December 2006 Asteroid lightcurve analysis at the Palmer Divide Observatory - February - March 2006 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2006MPBu...33...82W The Minor Planet Bulletin 33 4 82–84 1052-8091 2006MPBu...33...82W 16 January 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 16 January 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 1319 1318 Nerina 1319 1320 Impala 001319 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 19340319