1393 Sofala

Main-belt asteroid October 2019 yes 1393 Sofala #D6D6D6 C. Jackson Johannesburg Obs. 25 May 1936 (1393) Sofala 1936 KD1928 FB1951 GL1956 TE1958 CA1971 SJ1975 UB Sofala(Province in Mozambique) main-belt(inner)Vestianbackground 4 September 2017 (JD 2458000.5) 0 89.54 yr (32,703 days) 2.6997 AU 2.1685 AU 2.4341 AU 0.1091 3.80 yr (1,387 days) 146.78° 0.2595 ms / day 5.8476° 56.701° 183.46° 11.214 0.495 km11.30 km (calculated) 7.8 h (poor)16.5931 0.0005 h108.259 0.7031 h 0.20 (assumed)0.223 0.046 S (assumed) 11.835 0.002 (R)12.0012.112.42 0.78 1393 Sofala, provisional designation 1936 KD, is a Vestian asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 25 May 1936, by South African astronomer Cyril Jackson at the Union Observatory in Johannesburg. The asteroid was named after the province of Sofala in Mozambique. Orbit and classification Sofala is a member of the Vesta family (401), the second-largest asteroid family of the main-belt by number of members. However, it is also considered to be a non-family asteroid of the main belt's background population when applying the Hierarchical Clustering Method to its proper orbital elements. It orbits the Sun in the inner asteroid belt at a distance of 2.2–2.7 AU once every 3 years and 10 months (1,387 days). Its orbit has an eccentricity of 0.11 and an inclination of 6° with respect to the ecliptic. The asteroid was first identified as 1928 FB at Heidelberg Observatory in March 1928. The body's observation arc begins with its official discovery observation at Johannesburg in 1936. Physical characteristics Sofala is an assumed stony S-type asteroid. Rotation period The asteroid has an ambiguous lightcurve. While a lightcurve, obtained at the Palomar Transient Factory in September 2013, gave a rotation period of 108.259 hours with a brightness amplitude of 0.48 magnitude (U=2), another lightcurve modeled from combined dense and sparse photometry gave a sidereal period of 16.5931 hours.(U=2). If the first result were correct, Sofala would be one of few hundred known slow rotators with a period above 100 hours. The Lightcurve Data Base, however, adopts the shorter period from the modeled lightcurve. A third lightcurve with a period of 7.8 hours by René Roy from 2008 has received a poor rating. Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Sofala measures between 11.21 kilometers in diameter and its surface has an albedo of 0.223. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 11.30 kilometers based on an absolute magnitude of 12.1. Naming This minor planet was named after Sofala Province in central-eastern Mozambique. It is the country's largest province. Its capital city is Beira after which the Mars-crosser 1474 Beira, another discovery by Cyril Jackson, is named. The official 1393 naming citation was published by the Minor Planet Center in April 1953 (M.P.C. 909). References 30em 2017-09-29 last obs. JPL Small-Body Database Browser: 1393 Sofala (1936 KD) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001393 Jet Propulsion Laboratory 24 October 2017 Dictionary of Minor Planet Names – (1393) Sofala Schmadel Lutz D. Springer Berlin Heidelberg 113 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1394 (1393) Sofala 1393 Sofala (1936 KD) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1393 24 October 2017 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 – (1393) Sofala Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001393 24 October 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001393 dead Asteroid 1393 Sofala – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1393 29 October 2019 1393 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 6 J. Hanus J. Durech M. Broz A. Marciniak B. D. Warner F. Pilcher R. Stephens R. Behrend B. Carry D. Capek P. Antonini M. Audejean K. Augustesen E. Barbotin P. Baudouin A. Bayol L. Bernasconi W. Borczyk J.-G. Bosch E. Brochard L. Brunetto S. Casulli A. Cazenave S. Charbonnel B. Christophe F. Colas J. Coloma M. Conjat W. Cooney H. Correira V. Cotrez A. Coupier R. Crippa M. Cristofanelli Ch. Dalmas C. Danavaro C. Demeautis T. Droege R. Durkee N. Esseiva M. Esteban M. Fagas G. Farroni M. Fauvaud S. Fauvaud F. Del Freo L. Garcia S. Geier C. Godon K. Grangeon H. Hamanowa H. Hamanowa N. Heck S. Hellmich D. Higgins R. Hirsch M. Husarik T. Itkonen O. Jade K. Kaminski P. Kankiewicz A. Klotz R. A. Koff A. Kryszczynska T. Kwiatkowski A. Laffont A. Leroy J. Lecacheux Y. Leonie C. Leyrat F. Manzini A. Martin G. Masi D. Matter J. Michalowski M. J. Michalowski T. Michalowski J. Michelet R. Michelsen E. Morelle S. Mottola R. Naves J. Nomen J. Oey W. Ogloza A. Oksanen D. Oszkiewicz Pä ä kkö P. nen M. Paiella H. Pallares J. Paulo M. Pavic B. Payet M. Polinska D. Polishook R. Poncy Y. Revaz C. Rinner M. Rocca A. Roche D. Romeuf R. Roy H. Saguin P. A. Salom S. Sanchez G. Santacana T. Santana-Ros J.-P. Sareyan K. Sobkowiak S. Sposetti D. Starkey R. Stoss J. Strajnic J.-P. Teng B. Trégon A. Vagnozzi F. P. Velichko N. Waelchli K. Wagrez H. Wücher March 2013 Asteroids' physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution Astronomy and Astrophysics 551 16 2013A&A...551A..67H 10.1051/0004-6361/201220701 1301.6943 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 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 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 24 October 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 1393 1392 Pierre 1393 1394 Algoa 001393 Category:Discoveries by Cyril Jackson (astronomer) Category:Named minor planets 19360525