11066 Sigurd

Near-Earth asteroid October 2019 yes 11066 Sigurd #FFC2E0 11066 Sigurd.jpg An image of 11066 Sigurd as seen by the Arecibo and Goldstone radar observatories 9 February 1992 C. Shoemaker E. Shoemaker Palomar Obs. (11066) Sigurd 1992 CC 1 1987 GE Sigurd (Norse mythology) NEO Apollo 4 September 2017 (JD 2458000.5) 0 41.22 yr (15,057 days) 1.9138 AU 0.8691 AU 1.3915 AU 0.3754 1.64 yr (600 days) 314.05° 0.6005 ms / day 36.883° 349.25° 22.006° 0.1183 AU (46.1 LD) 2.10 0.09 km 2.778 0.115 km 2.86 km (calculated) 8.4958 h 8.496 h 8.51 0.01 h 0.18 (assumed) 0.190 0.033 0.29 0.04 0.38 0.31 SMASS K Sr S K 15.00 15.2 15.36 15.51 0.31 11066 Sigurd (provisional designation 1992 CC 1) is a stony contact binary asteroid classified as a near-Earth object of the Apollo group of asteroids, approximately 2.5 kilometers in diameter. It was discovered on 9 February 1992 by American astronomer couple Carolyn and Eugene Shoemaker at Palomar Observatory, California, and named after Sigurd, a hero from Norse mythology. Orbit and classification Sigurd orbits the Sun in the inner main-belt at a distance of 0.9–1.9 AU once every 1 years and 8 months (600 days). Its orbit has an eccentricity of 0.38 and an inclination of 37° with respect to the ecliptic. A first precovery was taken at the Australian Siding Spring Observatory in 1978, and it was identified as 1987 GE at Palomar in 1987. Both observations remained unused. The body's observation arc begins with its official discovery observation at Palomar in 1992. It has an Earth minimum orbital intersection distance of 0.1183 AU km on off 3, which corresponds to 46.1 lunar distances. Physical characteristics In the SMASS taxonomy, Sigurd is a relatively rare K-type asteroid, which fall into the broader stony S-complex. It has also been grouped into the common S-type asteroid. The ExploreNEOs Warm Spitzer program, using the NASA Infrared Telescope Facility on Mauna Kea Observatory in Hawaii, classifies Sigurd as a Sr-type, which transitions to the R-type asteroids. Contact binary Radiometric observations at Arecibo Observatory revealed that Sigurd is a contact binary, composed of two lobes in contact with each other. The more or less ellipsoidal lobes are elongated and joined on their long axis. The body has an axial tilt of 50° to 130°. The observing astronomers also note, that more than 10% of all larger (> 200 meters) near-Earth objects observed by radar are such contact binaries. Photometry Rotational lightcurves obtained from photometric observations by Petr Pravec, Brian Warner and by a group of German and Ukrainian astronomers, gave a well-defined rotation period of 8.4958 to 8.51 hours. The analysis of the constructed lightcurves also gave a high brightness amplitude between 0.97 and 1.15 magnitude, which is indicative that Sigurd has a non-spheroidal shape (U=3/3/3). Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Sigurd measures between 2.10 and 2.778 kilometers in diameter and its surface has an albedo of 0.190 and 0.29, respectively. Observations by the ExploreNEOs survey give a higher albedo of 0.38. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.18 and calculates a diameter of 2.86 kilometers with an absolute magnitude of 15.2, while radiometric observations of Sigurd gave a maximum dimensions of 4.2 kilometers. Naming This minor planet was named after Sigurd, a legendary hero in Norse mythology. In the Völsunga saga, Sigurd rides through a ring of fire to awaken the shieldmaiden Brynhild (123 123 Brunhild), and later dies in a fight with Odin (3989 3989 Odin). Sigurd is also known as the dragon-slayer Siegfried in the German poem The Song of the Nibelungs. The approved naming citation was published by the Minor Planet Center on 23 May 2000 (M.P.C. 40706). References 30em 2017-06-22 last obs. JPL Small-Body Database Browser: 11066 Sigurd (1992 CC1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2011066 Jet Propulsion Laboratory 5 July 2017 Dictionary of Minor Planet Names – (11066) Sigurd Schmadel Lutz D. Springer Berlin Heidelberg 751 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_8204 (11066) Sigurd 11066 Sigurd (1992 CC1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=11066 5 April 2017 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 5 April 2017 6 Michael W. Busch S. J. Ostro L. A. Benner M. Brozovic C. Magri D. J. Scheeres S. A. Jacobson J. L. Margot M. C. Nolan P. A. Taylor E. Howell M. Shepard J. D. Giorgini October 2012 Radar Imaging Of 11066 Sigurd, 2000 YF29, And 2004 XL14 And The Obliquity Distribution Of Contact Binary Near-Earth Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012DPS....4430205B American Astronomical Society 44 302.05 2012DPS....4430205B 5 April 2017 6 A. Mainzer T. Grav J. Bauer J. Masiero R. S. McMillan R. M. Cutri R. Walker E. Wright P. Eisenhardt D. J. Tholen T. Spahr R. Jedicke L. Denneau E. DeBaun D. Elsbury T. Gautier S. Gomillion E. Hand W. Mo J. Watkins A. Wilkins G. L. Bryngelson A. Del Pino Molina S. Desai M. Gómez Camus S. L. Hidalgo I. Konstantopoulos J. A. Larsen C. Maleszewski M. A. Malkan J.-C. Mauduit B. L. Mullan E. W. Olszewski J. Pforr A. Saro J. V. Scotti L. H. Wasserman December 2011 NEOWISE Observations of Near-Earth Objects: Preliminary Results http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...743..156M The Astrophysical Journal 743 2 17 2011ApJ...743..156M 10.1088/0004-637X/743/2/156 1109.6400 239991 5 April 2017 11066 5 April 2017 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 35447010 6 C. R. Nugent A. Mainzer J. Bauer R. M. Cutri E. A. Kramer T. Grav J. Masiero S. Sonnett E. L. Wright September 2016 NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos The Astronomical Journal 152 3 12 2016AJ....152...63N 10.3847/0004-6256/152/3/63 1606.08923 free Petr Pravec Marek Wolf Lenka Sarounová November 1998 Lightcurves of 26 Near-Earth Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1998Icar..136..124P Icarus 136 1 124–153 1998Icar..136..124P 10.1006/icar.1998.5993 5 April 2017 6 Yu. N. Krugly I. N. Belskaya V. G. Shevchenko V. G. Chiorny F. P. Velichko S. Mottola A. Erikson G. Hahn A. Nathues G. Neukum N. M. Gaftonyuk E. Dotto August 2002 The Near-Earth Objects Follow-up Program. IV. CCD Photometry in 1996-1999 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002Icar..158..294K Icarus 158 2 294–304 2002Icar..158..294K 10.1006/icar.2002.6884 5 April 2017 6 C. A. Thomas D. E. Trilling J. P. Emery M. Mueller J. L. Hora L. A. M. Benner B. Bhattacharya W. F. Bottke S. Chesley M. Delbó G. Fazio A. W. Harris A. Mainzer M. Mommert A. Morbidelli B. Penprase H. A. Smith T. B. Spahr J. A. Stansberry September 2011 ExploreNEOs. V. Average Albedo by Taxonomic Complex in the Near-Earth Asteroid Population The Astronomical Journal 142 3 12 2011AJ....142...85T 10.1088/0004-6256/142/3/85 free Cristina A. Thomas Joshua P. Emery David E. Trilling Marco Delbó Joseph L. Hora Michael Mueller January 2014 Physical characterization of Warm Spitzer-observed near-Earth objects http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014Icar..228..217T Icarus 228 217–246 2014Icar..228..217T 10.1016/j.icarus.2013.10.004 1310.2000 2060/20140012047 119278697 5 April 2017 Warner, Brian D. July 2015 Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2015 January - March The Minor Planet Bulletin 42 3 172–183 32455355 7244166 1052-8091 2015MPBu...42..172W 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 53493339 5 April 2017 B. Carry E. Solano S. Eggl F. E. DeMeo April 2016 Spectral properties of near-Earth and Mars-crossing asteroids using Sloan photometry http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016Icar..268..340C Icarus 268 340–354 2016Icar..268..340C 10.1016/j.icarus.2015.12.047 1601.02087 119258489 5 April 2017 External links IAUC 5459 (discovery 1992 CC 1), Central Bureau for Astronomical Telegrams, 27 February 1992 Contact Binary Asteroids and Comets, Robert Johnston, list at jonstonsarchive.net, 25 March 2017 Binary and Ternary near-Earth Asteroids detected by radar, Lance A. M. Benner, ASA/JPL Asteroid Radar Research (11066) Sigurd at NEODyS-2 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 11066 11066 Sigurd (11065) 1991 XE2 11066 11067 Greenancy 011066 Category:Discoveries by Eugene Merle Shoemaker Category:Discoveries by Carolyn S. Shoemaker Category:Named minor planets 011066 011066 011066 19920209