176 Iduna

Main-belt asteroid October 2019 yes (176) Iduna #D6D6D6 000176-asteroid shape model (176) Iduna.png 3D convex shape model of 176 Iduna 176 Iduna iː ' d uː n ə Iðunn A877 TB; 1945 RQ C. H. F. Peters 14 October 1877 Main belt 3.1880 AU Gm on 2.6526 AU Gm on 3.7235 AU Gm on on 5.69 yr (2079.1 d) 22.660° 0.16796 121.04 2.2 km 11.2877 h d on on11.289 hours G 8.2 0.0834 0.003 31 July 2016 (JD 2457600.5) 200.50° 188.17° 165.15° 0.17315 ms / day 138.50 yr (50587 d) 0 1.65682 AU Gm on 1.73015 AU Gm on 3.056 176 Iduna is a large main-belt asteroid that was discovered by German-American astronomer Christian Heinrich Friedrich Peters on October 14, 1877, in Clinton, New York. It is named after Sällskapet Idun, a club in Stockholm that hosted an astronomical conference; Idun (Iðunn, Iduna) is also a Norse goddess.http://www.astro.uu.se/~classe/svenska_ast-K081215.html Motiveringar till asteroidnamn med svensk anknytning. Uppsala University Swedish 24 October 2017 https://web.archive.org/web/20090708113028/http://www.astro.uu.se/~classe/svenska_ast-K081215.html 8 July 2009 deadSchmadel Lutz Dictionary of Minor Planet Names 2 1992 Springer Verlag Berlin 3-540-00238-3 28 https://books.google.com/books?id=aeAg1X7afOoC&q=176+Iduna&pg=PA28 24 October 2017 A G-type asteroid, it has a composition similar to that of the largest main-belt asteroid, 1 Ceres. An occultation of a star by Iduna was observed from Mexico on January 17, 1998. Photometric observations of this asteroid at the Romer Observatory in Aarhus, Denmark during 1996 gave a light curve with a period of 11.289 ± 0.006 hours and a brightness variation of 0.35 in magnitude. A 2008 study at the Palmer Divide Observatory in Colorado Springs, Colorado gave a period of 11.309 ± 0.005 hours, confirming the 1996 result. References Donald K. Yeomans 176 Iduna JPL Small-Body Database Browser NASA Jet Propulsion Laboratory https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=176 12 May 2016 . Hansen A. T. Arentoft T. The Rotational Period of 176 Iduna The Minor Planet Bulletin 24 14 1997MPBu...24Q..14H . June 1997 Warner Brian D. Asteroid Lightcurve Analysis at the Palmer Divide Observatory - June - October 2007 The Minor Planet Bulletin 35 2 56–60 2008MPBu...35...56W . June 2008 External links Lightcurve plot of 176 Iduna, Palmer Divide Observatory, B. D. Warner (2007) 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 176 175 Andromache 176 177 Irma Category:Background asteroids Iduna Iduna Category:G-type asteroids (Tholen) Category:Ch-type asteroids (SMASS) 18771014 Category:Objects observed by stellar occultation