1939 Loretta

Carbonaceous main-belt asteroid October 2019 yes 1939 Loretta #D6D6D6 17 October 1974 C. Kowal Palomar Obs. (1939) Loretta 1974 UC1934 JE1934 LQ1939 EH1939 GP1950 DT1950 ES1951 MF1955 CA1969 TE 51975 TZ 51975 XW Loretta Kowal(daughter of discoverer) main-beltThemistian 4 September 2017 (JD 2458000.5) 0 67.21 yr (24,547 days) 3.5154 AU 2.7291 AU 3.1222 AU 0.1259 5.52 yr (2,015 days) 24.968° 0.1787 ms / day 0.9058° 40.473° 189.36° 26.34 0.46 km29.08 0.51 km29.83 km (derived)30.243 0.335 km30.365 0.351 25 h 0.0721 (derived)0.092 0.0130.0927 0.00890.101 0.0200.103 0.004 C 10.811.011.1 1939 Loretta, provisional designation 1974 UC, is a carbonaceous Themistian asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 17 October 1974, by American astronomer Charles Kowal at Palomar Observatory in California, who named it after his daughter, Loretta Kowal. The discovery of the asteroid took place during Kowal's follow-up observations of Jupiter's moon Leda, which he had discovered one month prior.Kowal C. T. Aksnes, K. Marsden, B. G. Roemer, E. Thirteenth satellite of Jupiter Astronomical Journal 1974 80 463 http://adsabs.harvard.edu//full/seri/AJ.../0080//0000463.000.html 10.1086/111766 1975AJ.....80..460K Orbit and classification Loretta is a member of the Themis family, a dynamical family of main-belt asteroids with nearly coplanar ecliptical orbits. It orbits the Sun in the outer main-belt at a distance of 2.7–3.5 AU once every 5 years and 6 months (2,015 days). Its orbit has an eccentricity of 0.13 and an inclination of 1° with respect to the ecliptic. First identified as 1934 JE at the South African Johannesburg Observatory, Lorettas first used observation was made at the Finnish Turku Observatory in 1939, extending the body's observation arc by 35 years prior to its discovery. Physical characteristics Loretta has been characterized as a carbonaceous C-type asteroid. Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Loretta measures between 26.3 and 30.4 kilometers in diameter, and its surface has an albedo between 0.092 and 0.101. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.072 and a diameter of 29.8 kilometers with an absolute magnitude of 11.1. Rotation period A fragmentary rotational lightcurve of Loretta was obtained from photometric observations made by French amateur astronomer Pierre Antonini in March 2011. It gave an approximate rotation period of 25 hours with a brightness variation of 0.12 magnitude (U=1). Naming This minor planet was named by the discoverer after his daughter, Loretta Kowal. The official 1939 naming citation was published by the Minor Planet Center on 1 June 1975 (M.P.C. 3828). References 30em 2017-05-05 last obs. JPL Small-Body Database Browser: 1939 Loretta (1974 UC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001939 Jet Propulsion Laboratory 10 June 2017 Dictionary of Minor Planet Names – (1939) Loretta Schmadel Lutz D. Springer Berlin Heidelberg 155 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1940 (1939) Loretta 1939 Loretta (1974 UC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1939 9 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 Asteroids and comets rotation curves – (1939) Loretta Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001939 9 December 2016 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001939 dead 1939 9 December 2016 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 9 December 2016 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 9 December 2016 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20110721225144/http://www.minorplanet.info/lightcurvedatabase.html 21 July 2011 ) 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 1939 1938 Lausanna 1939 1940 Whipple 001939 Category:Discoveries by Charles T. Kowal Category:Named minor planets 19741017