1293 Sonja

Mars-crossing asteroid October 2019 yes 1293 Sonja #FA8072 26 September 1933 E. Delporte Uccle Obs. (1293) Sonja 1933 SO unknown Mars-crosser 4 September 2017 (JD 2458000.5) 0 83.39 yr (30,458 days) 2.8407 AU 1.6138 AU 2.2272 AU 0.2754 3.32 yr (1,214 days) 104.45° 0.2965 ms / day 5.3639° 236.38° 99.831° 3.65 0.45 km7.23 km (derived)7.80 0.7 km (IRAS:3) 2.876 0.001 hLCDB-Klinglesmith-20172.8768 0.0003 hLCDB-Pravec-2016lightcurve-plot-Pravec-20162.87797 0.00002 hLCDB-Pravec-2008lightcurve-plot-Pravec-20082.878 0.001 h2.8785 0.0001 h2.879 0.001 hLCDB-Stephens-2017blightcurve-plot-Stephens-2017b2.879 0.002 h2.881 0.002 hLCDB-Aznar-2017b 0.1226 (derived)0.4598 0.095 (IRAS:3)0.529 0.133 SMASS = SqS 12.0013.5013.613.86 0.32 1293 Sonja, provisional designation 1933 SO, is a stony asteroid and bright Mars-crosser from the innermost regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 26 September 1933, by Belgian astronomer Eugène Delporte at Uccle Observatory in Belgium. Two nights later, Sonja was independently discovered by Soviet astronomer Grigory Neujmin at Simeiz on the Crimean peninsula. The origin of the asteroid's name is unknown. Orbit and classification In the SMASS taxonomy, Sonja is classified as a Sq-type, an intermediary between the abundant S and rather rare Q-type asteroids. It orbits the Sun in the inner main-belt at a distance of 1.6–2.8 AU once every 3 years and 4 months (1,214 days). Its orbit has an eccentricity of 0.28 and an inclination of 5° with respect to the ecliptic. Sonjas observation arc begins with its official discovery observation at Uccle, as no precoveries were taken and no prior identifications were made. Physical characteristics Rotation period Several well-defined rotational lightcurves of Sonja were obtained from photometric observations during 2003–2016.lightcurve-plot-Pravec-2016lightcurve-plot-Stephens-2017b Light-curve analysis gave a concurring rotation period of 2.876–2.879 hours with a brightness variation between 0.14 and 0.21 magnitude. In 2006, the first lightcurve was obtained by David Higgins (U=3), followed by Federico Manzini and Vladimir Benishek (U3/3-). Photometric observations continued in August 2008, by Petr Pravec at Ondřejov Observatory (U3),LCDB-Pravec-2008lightcurve-plot-Pravec-2008 and in 2016, four more lightcurves were obtained by Peter Kušnirák and Petr Pravec, as well as by Robert Stephens, Daniel Klinglesmith and Isaac Aznar (U=3/3/3/3).LCDB-Klinglesmith-2017LCDB-Pravec-2016LCDB-Stephens-2017bLCDB-Aznar-2017b Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the Infrared Astronomical Satellite IRAS, Sonja measures 3.65 and 7.80 kilometers in diameter, and its surface has an exceptionally high albedo of 0.53 and 0.46, respectively. This would make Sonja one of the brightest known Mars-crossing asteroids. However, the Collaborative Asteroid Lightcurve Link derives an albedo of 0.1226 and a diameter of 7.23 kilometers with an absolute magnitude of 13.6. Naming It is unknown as to whether the name "Sonja" refers to any known place, person or occurrence. It was speculated that "Sonja" could have been chosen based on the two letter of its provisional designation, 1933 SO. It is also speculated, that the name "Sonja" might have been on a list of generic German female names sent by the German ARI to several discoverers of minor planets in 1913, requesting the immediate naming of their discoveries in order to avoid confusion and possible errors (RI 1039; AN 196 and 137). Unknown meaning Among the many thousands of named minor planets, Sonja is one of 120 asteroids, for which no official naming citation has been published. All of these low-numbered asteroids have numbers between 164 164 Eva and 1514 1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomers Auguste Charlois, Johann Palisa, Max Wolf and Karl Reinmuth. Notes 30em LCDB-Pravec-2008 Pravec (2008) web: rotation period 2.87797 0.00002 hours with a brightness amplitude of 0.16 mag. Summary figures for (1293) Sonja at Collaborative Asteroid Lightcurve Link (CALL) and Pravec, P.; Wolf, M.; Sarounova, L. (2008) LCDB-Pravec-2016 Pravec (2016) web: light-curve taken on 2016-07-09. Rotation period 2.8768 0.0003 hours with a brightness amplitude of 0.18 mag and Quality Code of 3. Summary figures for (1293) Sonja at Collaborative Asteroid Lightcurve Link (CALL) and Pravec, P.; Wolf, M.; Sarounova, L. (2016) lightcurve-plot-Pravec-2008 Rotational light-curve plot of (1293) Sonja from 2008. Ondrejov Asteroid Photometry Project from unpublished data by Petr Pravec lightcurve-plot-Pravec-2016 Rotational light-curve plot of (1293) Sonja from 2016. Ondrejov Asteroid Photometry Project from unpublished data by Peter Kušnirák and Petr Pravec LCDB-Stephens-2017b Not yet available on SAO/NASA Astrophysics Data System (ADS): Stephens 2017b, see summary figures at LCDB entry for (1293) Sonja lightcurve-plot-Stephens-2017b Rotational light-curve plot of (1293) Sonja from July 2016. Published at the Center for Solar System Studies (CS3) by Robert Stephens LCDB-Aznar-2017b Not yet available on SAO/NASA Astrophysics Data System (ADS): Aznar 2017b, see summary figures at LCDB entry for (1293) Sonja LCDB-Klinglesmith-2017 Not yet available on SAO/NASA Astrophysics Data System (ADS): Klinglesmith 2017, see summary figures at LCDB entry for (1293) Sonja References 2017-02-15 last obs. JPL Small-Body Database Browser: 1293 Sonja (1933 SO) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001293 Jet Propulsion Laboratory 26 July 2017 Dictionary of Minor Planet Names – (1293) Sonja Schmadel Lutz D. Springer Berlin Heidelberg 106 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1294 (1293) Sonja Dictionary of Minor Planet Names – (579) Sidonia / ARI note from 1913 Schmadel Lutz D. Springer Berlin Heidelberg 59–60 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_580 (579) Sidonia Dictionary of Minor Planet Names – Fifth Revised and Enlarged revision Appendix 11 – Minor Planet Names with Unknown Meaning Schmadel Lutz D. Springer Berlin Heidelberg 927–929 2007 978-3-540-00238-3 Lutz D. Schmadel 1293 Sonja (1933 SO) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1293 18 January 2017 Asteroids and comets rotation curves – (1293) Sonja Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001293 18 January 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001293 dead 1293 18 January 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 free (online, AcuA catalog p. 153) David Higgins Rui M. D. Goncalves March 2007 Asteroid Lightcurve Analysis at Hunters Hill Observatory and Collaborating Stations - June-September 2006 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2007MPBu...34...16H The Minor Planet Bulletin 34 1 16–18 1052-8091 2007MPBu...34...16H 18 January 2017 Benishek, Vladimir March 2008 CCD Photometry of Seven Asteroids at the Belgrade Astronomical Observatory http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35...28B The Minor Planet Bulletin 35 1 28–30 1052-8091 2008MPBu...35...28B 18 January 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 18 January 2017 External links Astronomia Para Todos, Observatorio Isaac Aznar, Asteroids lightcurves 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 1293 1292 Luce 1293 1294 Antwerpia 001293 Category:Discoveries by Eugène Joseph Delporte Category:Named minor planets 001293 19330926 Category:Minor planets named after their provisional designation