1775 Zimmerwald

Main-belt asteroid October 2019 yes 1775 Zimmerwald #D6D6D6 13 May 1969 P. Wild Zimmerwald Obs. (1775) Zimmerwald 1969 JA1952 HB 21952 HD1953 TE 2 Zimmerwald(village; observatory) main-beltEunomia 4 September 2017 (JD 2458000.5) 0 67.20 yr (24,545 days) 3.0866 AU 2.1182 AU 2.6024 AU 0.1861 4.20 yr (1,533 days) 148.54° 0.2348 ms / day 12.555° 195.94° 84.725° 10.17 0.69 km10.232 0.088 km10.70 2.19 km11.03 km (calculated) 122 5 h 0.21 (assumed)0.21 0.090.244 0.0410.247 0.035 S 12.08 0.3112.112.26 1775 Zimmerwald, provisional designation 1969 JA, is a stony Eunomian asteroid and slow rotator from the middle region of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 13 May 1969, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland. It is named for the village of Zimmerwald, where the discovering observatory is located. Orbit and classification Zimmerwald is a member of the Eunomia family, a large group of mostly stony S-type asteroids and the most prominent family in the intermediate main-belt, which is located between two prominent Kirkwood gaps. It orbits the Sun in the central main-belt at a distance of 2.1–3.1 AU once every 4 years and 2 months (1,533 days). Its orbit has an eccentricity of 0.19 and an inclination of 13° with respect to the ecliptic. The first precovery of Zimmerwald was taken at Palomar Observatory in 1949, extending the body's observation arc by 20 years prior to its official discovery observation at Zimmerwald. During the 1950s, it was also identified at Heidelberg, Goethe Link and McDonald Observatory. Physical characteristics Rotation period In May 2011, a rotational lightcurve of Zimmerwald was obtained by American astronomer Robert Stephens at the Center for Solar System Studies, California, using photometric observations taken at the Santana and Goat Mountain observatories (646, G79). Lightcurve analysis gave a very long rotation period of 122 5 hours with a change in brightness of 0.60 magnitude (U=2+). It is also suspected, that the body might be in a nonprincipal axis rotation, which is commonly known as "tumbling". While the slowest rotators have periods above 1000 hours, the majority of minor planets have periods shorter than 20 hours. Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Zimmerwald measures 10.17 and 10.70 kilometers in diameter, and its surface has an albedo between of 0.244 and 0.21, respectively (without preliminary results). The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from 15 Eunomia, the family's largest member and namesake – and calculates a diameter of 11.03 kilometers using an absolute magnitude of 12.1. Naming This minor planet was named for the small village of Zimmerwald, location of the discovering Zimmerwald Observatory. It is located about seven miles south of the Swiss capital Bern, after which the binary asteroid 1313 Berna was named. The official 1775 naming citation was published by the Minor Planet Center on 18 April 1977 (M.P.C. 4155). References 30em 2017-02-04 last obs. JPL Small-Body Database Browser: 1775 Zimmerwald (1969 JA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001775 Jet Propulsion Laboratory 8 June 2017 Dictionary of Minor Planet Names – (1775) Zimmerwald Schmadel Lutz D. Springer Berlin Heidelberg 142 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1776 (1775) Zimmerwald 1775 Zimmerwald (1969 JA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1775 26 January 2017 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 2009 https://archive.org/details/dictionaryminorp2008schm limited 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 2009dmpn.book.....S 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri J. Dailey P. R. M. Eisenhardt R. S. McMillan T. B. Spahr M. F. Skrutskie D. Tholen R. G. Walker E. L. Wright E. DeBaun D. Elsbury T. IV Gautier S. Gomillion A. Wilkins November 2011 Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M The Astrophysical Journal 741 2 20 2011ApJ...741...68M 10.1088/0004-637X/741/2/68 1109.4096 118745497 26 January 2017 1775 26 January 2017 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 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 Stephens, Robert D. October 2011 Asteroids Observed from GMARS and Sanana Observatories: 2011 April - June https://www.researchgate.net/publication/252572425 The Minor Planet Bulletin 38 4 211–212 1052-8091 2011MPBu...38..211S 26 January 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 53493339 26 January 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 1775 1774 Kulikov 1775 1776 Kuiper 001775 Category:Discoveries by Paul Wild (Swiss astronomer) Category:Named minor planets 001775 001775 19690513