1126 Otero

Main-belt asteroid October 2026 yes 1126 Otero #D6D6D6 11 January 1929 K. Reinmuth Heidelberg Obs. (1126) Otero 1929 AC1926 GD1948 RN 11949 YO Carolina Otero(Spanish courtesan) main-beltFlora 4 September 2017 (JD 2458000.5) 0 90.71 yr (33,133 days) 2.6052 AU 1.9394 AU 2.2723 AU 0.1465 3.43 yr (1,251 days) 291.09° 0.2877 ms / day 6.5045° 1.0892° 136.08° 8.87 1.56 km10.974 0.892 km11.74 km (derived) 3.648 0.002 h3.64808 0.00014 hLCDB-Pravec-2008 0.1994 (derived)0.37 0.130.399 0.320 SMASS = AA 11.4111.57 0.05 (R)LCDB-Pravec-200811.912.098 0.07112.10 1126 Otero, provisional designation 1929 AC, is a Florian asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 11 January 1929, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. It was named after Spanish courtesan Carolina Otero. Classification and orbit Otero is a member of the Flora family, one of the largest families of stony asteroids in the main belt. It orbits the Sun in the inner main-belt at a distance of 1.9–2.6 AU once every 3 years and 5 months (1,251 days). Its orbit has an eccentricity of 0.15 and an inclination of 7° with respect to the ecliptic. It was first identified as 1926 GD at Uccle/Heidelberg in 1926, extending the asteroid's observation arc by 3 years prior to its official discovery at Heidelberg. Physical parameters In the SMASS classification, Otero is classified as an A-type asteroid. Lightcurves Two rotational lightcurve of Otero were obtained from photometric observations by astronomers Petr Pravec and Robert Stepens in February 2008. Lightcurve analysis gave a concurring, well-defined rotation period of 3.648 hours with a brightness variation of 0.69 and 0.70 magnitude, respectively (U=3/3).LCDB-Pravec-2008 Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Otero measures 8.87 and 10.974 kilometers in diameter and its surface has an albedo of 0.37 and 0.399, respectively. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1994 and a diameter of 11.74 kilometers with an absolute magnitude of 12.098 from Petr Pravec's revised WISE-data. thumb|A lightcurve-based 3D-model of Otero|alt=A lightcurve-based 3D-model of Otero Naming This minor planet was named by the discoverer for Galician-born Spanish courtesan, dancer and actress Carolina Otero (1868–1965), who was also known as "La Belle Otero". During the Belle Époque, she was the most sought after woman in all of Europe and led an excessive life thanks to her numerous rich and famous lovers. The official naming citation was first published by the Astronomical Calculation Institute (RI 803). Space-based observations Otero was observed by ESA's mission Hera from a distance of 2.8 million km on 11 May 2025, as the spacecraft was heading toward Didymos. Notes LCDB-Pravec-2008 Pravec (2008) web: lightcurve plot of (1126) Otero by Petr Pravec of the Ondrejov Asteroid Photometry Project, with rotation period 3.64808 0.00014 hours and a brightness amplitude of 0.69 mag. Summary figures at Collaborative Asteroid Lightcurve Link and Pravec, P.; Wolf, M.; Sarounova, L. (2008) References 30em 2016-12-21 last obs. JPL Small-Body Database Browser: 1126 Otero (1929 AC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001126 Jet Propulsion Laboratory 26 July 2017 Dictionary of Minor Planet Names – (1126) Otero Schmadel Lutz D. Springer Berlin Heidelberg 95–96 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1127 (1126) Otero 1126 Otero (1929 AC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1126 14 March 2017 1126 14 March 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 14 March 2017 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 Stephens, Robert D. September 2008 Asteroids Observed from GMARS and Santana Observatories - Late 2007 and Early 2008 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35..126S The Minor Planet Bulletin 35 3 126–128 1052-8091 2008MPBu...35..126S 14 March 2017 Petr Pravec Alan W. Harris Peter Kusnirák Adrián Galád Kamil Hornoch September 2012 Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P Icarus 221 1 365–387 2012Icar..221..365P 10.1016/j.icarus.2012.07.026 14 March 2017 11104/0217021 free Article First asteroid sightings push Hera's camera to the limit https://www.esa.int/Space_Safety/Hera/First_asteroid_sightings_push_Hera_s_camera_to_the_limit European Space Agency 6 August 2025 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 1126 1125 China 1126 1127 Mimi 001126 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001126 19290111