11573 Helmholtz

Main-belt asteroid April 2018 yes 11573 Helmholtz #D6D6D6 F. BörngenL. D. Schmadel Karl Schwarzschild Obs. 20 September 1993 (11573) Helmholtz 1993 SK 31982 YN 4 Hermann von Helmholtz(German naturalist) main-belt(outer)backgroundZhongguo 23 March 2018 (JD 2458200.5) 0 34.92 yr (12,755 d) 4.1213 AU 2.3952 AU 3.2582 AU 0.2649 5.88 yr (2,148 d) 21.116° 0.1676 ms / day 2.2499° 310.61° 127.67° 13 km (est. at 0.057) 13.2 11573 Helmholtz, provisional designation 1993 SK 3, is a Zhongguo asteroid from the outermost region of the asteroid belt, approximately 13 km mi off 1 us in diameter. It was discovered on 20 September 1993, by German astronomers Freimut Börngen and Lutz Schmadel at the Karl Schwarzschild Observatory in Tautenburg, Germany. It is one of few asteroids located in the 2:1 resonance with Jupiter. The asteroid was named for German physicist Hermann von Helmholtz. Orbit and classification Helmholtz is a non-family asteroid from the main belt's background population. It is a member of the small group of Zhongguo asteroids, located in the Hecuba gap (2:1 mean motion resonance with Jupiter) near 3.27 AU. Contrary to the nearby unstable Griqua group, the orbits of the Zhongguos are stable over half a billion years. It orbits the Sun in the outer main-belt at a distance of 2.4–4.1 AU once every 5 years and 11 months (2,148 days; semi-major axis of 3.26 AU). Its orbit has an eccentricity of 0.26 and an inclination of 2° with respect to the ecliptic. The asteroid was first observed as 1982 YN 4 at Crimea–Nauchnij in December 1982. The body's observation arc begins at Palomar Observatory in January 1989. Physical characteristics Diameter and albedo Based on a generic magnitude-to-diameter conversion, Helmholtz measures 13 kilometer in diameter for an absolute magnitude of 13.2 and an assumed albedo of 0.057, which is typical for carbonaceous asteroids. If the body was of stony rather than carbonaceous composition, its estimated diameter would be less than 7 kilometer. Rotation period As of 2018, no rotational lightcurve of Helmholtz has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown. Naming This minor planet was named after German physiologist and physicist Hermann von Helmholtz (1821–1894), a prolific naturalists of the 19th century. The official naming citation was published by the Minor Planet Center on 20 March 2000 (M.P.C. 39658). The lunar crater Helmholtz as well as the crater Helmholtz on Mars are also named in his honor.2438 Lunar crater Helmholtz2439 Martian crater Helmholtz References 30em 2017-11-24 last obs. JPL Small-Body Database Browser: 11573 Helmholtz (1993 SK3) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2011573 Jet Propulsion Laboratory 27 April 2018 11573 Helmholtz (1993 SK3) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=11573 2 February 2018 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 2 February 2018 F. Roig D. Nesvorný S. Ferraz-Mello September 2002 Asteroids in the 2 : 1 resonance with Jupiter: dynamics and size distribution [ Erratum: 2002MNRAS.336.1391R ] Monthly Notices of the Royal Astronomical Society 335 2 417–431 2002MNRAS.335..417R 10.1046/j.1365-8711.2002.05635.x free Asteroid 11573 Helmholtz – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=11573 29 October 2019 Asteroid Size Estimator CNEOS NASA/JPL https://cneos.jpl.nasa.gov/tools/ast_size_est.html 2 February 2018 11573 2 February 2018 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 (10001)-(15000) – Minor Planet Center 11573 11572 Schindler 11573 11574 d'Alviella 011573 011573 Category:Discoveries by Freimut Börngen Category:Discoveries by Lutz D. Schmadel Category:Named minor planets 19930920