1760 Sandra

Main-belt asteroid October 2019 yes 1760 Sandra #D6D6D6 10 April 1950 Ernest Johnson Johannesburg Obs. (1760) Sandra 1950 GB1934 NP1935 QH1950 HF1950 JM1951 OK1967 JC1968 OC Sandra (discoverer's granddaughter) main-belt(outer) 4 September 2017 (JD 2458000.5) 0 81.66 yr (29,826 days) 3.5564 AU 2.7418 AU 3.1491 AU 0.1293 5.59 yr (2,041 days) 6.2435° 0.1764 ms / day 8.4403° 232.61° 332.93° 33.989 0.214 km34.765 0.454 km35.89 3.5 km36.03 km (derived)36.64 1.03 km37.71 0.64 km 6.5668 0.0004 h 0.034 0.0020.0345 0.0080.0385 0.00550.054 0.0110.0542 (derived) C 10.9011.011.23 0.2711.5 1760 Sandra, provisional designation 1950 GB, is a carbonaceous asteroid from the outer regions of the asteroid belt, approximately 35 kilometers in diameter. It was discovered on 10 April 1950, by South African astronomer Ernest Johnson at Union Observatory in Johannesburg, and named after his granddaughter Sandra. Orbit and classification Sandra is a carbonaceous C-type asteroid that orbits the Sun in the outer main-belt at a distance of 2.7–3.6 AU once every 5 years and 7 months (2,041 days). Its orbit has an eccentricity of 0.13 and an inclination of 8° with respect to the ecliptic. It was first identified as 1934 NP at the discovering observatory. The body's observation arc begins with its identification as 1935 QH at Heidelberg in 1935, or 15 years prior to its official discovery observation at Johannesburg. Lightcurve In April 2006, a rotational lightcurve of Sandra was obtained from photometric observations by French amateur astronomer Pierre Antonini. Lightcurve analysis gave a well-defined rotation period of 6.5668 hours with a brightness variation of 0.42 magnitude (U=3). 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, Sandra measures between 33.989 and 37.71 kilometers in diameter and its surface has an albedo between 0.034 and 0.054. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0542 and a diameter of 36.03 kilometers with on an absolute magnitude of 11.0. Naming This minor planet was named by the South African discover Ernest Johnson after his granddaughter Sandra. The official 1760 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3934). References 2017-04-28 last obs. JPL Small-Body Database Browser: 1760 Sandra (1950 GB) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001760 Jet Propulsion Laboratory 1 July 2017 Dictionary of Minor Planet Names – (1760) Sandra Schmadel Lutz D. Springer Berlin Heidelberg 140 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1761 (1760) Sandra 1760 Sandra (1950 GB) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1760 4 April 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 – (1760) Sandra Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001760 4 April 2017 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001760 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 4 April 2017 1760 4 April 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) 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 4 April 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 4 April 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 1760 1759 Kienle 1760 1761 Edmondson 001760 Category:Discoveries by Ernest Leonard Johnson Category:Named minor planets 19500410