1688 Wilkens

Main-belt asteroid October 2019 yes 1688 Wilkens #D6D6D6 3 March 1951 M. Itzigsohn La Plata Obs. (1688) Wilkens 1951 EQ 11964 JC Alexander Wilkens(German astronomer) main-belt(middle)Mitidika 4 September 2017 (JD 2458000.5) 0 66.05 yr (24,123 days) 3.2511 AU 1.9834 AU 2.6173 AU 0.2422 4.23 yr (1,547 days) 158.97° 0.2328 ms / day 11.763° 245.77° 42.399° 12.12 km (calculated)16.239 0.118 km16.82 0.29 km 7.248 0.001 h7.3017 0.0676 h 0.044 0.0050.066 0.0030.10 (assumed) S (assumed) 12.5012.712.91 0.4512.953 0.002 (S) 1688 Wilkens, provisional designation 1951 EQ 1, is a Mitidika asteroid from the central region of the asteroid belt, approximately 16 kilometers in diameter. It was discovered on 3 March 1951, by Argentine astronomer Miguel Itzigsohn at La Plata Observatory in the Province of Buenos Aires, Argentina, and named after astronomer Alexander Wilkens. Classification and orbit Wilkens has been identified as a member of the Mitidika family, a dispersed asteroid family of typically carbonaceous C-type asteroids. The family is named after 2262 Mitidika (diameter of 9 km) and consists of 653 known members, the largest ones being 404 Arsinoë (95 km) and 5079 Brubeck (17 km).23 It orbits the Sun in the central main-belt at a distance of 2.0–3.3 AU once every 4 years and 3 months (1,547 days). Its orbit has an eccentricity of 0.24 and an inclination of 12° with respect to the ecliptic. As no precoveries were taken, and no prior identifications were made, Wilkens observation arc begins with its official discovery observation in 1951. Physical characteristics Rotation period In July 2007, astronomer Lorenzo Franco obtained a rotational lightcurve of Wilkens at the Balzaretto Observatory (A81) near Rome, Italy. It gave a well-defined period of 7.248 hours and a brightness variation of 0.23 magnitude (U=3). Photometric observations in the S-band at the Palomar Transient Factory in January 2014, gave a period of 7.3017 hours with an amplitude of 0.34 (U=2). 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, Wilkens measures 16.23 and 16.82 kilometers in diameter, and its surface has an albedo of 0.044 and 0.066, respectively. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 and calculates a diameter of 12.12 kilometers based on an absolute magnitude of 12.7. Naming This minor planet was named for German astronomer Alexander Wilkens (1881–1968), researcher in many branches of astronomy, most notably celestial mechanics. After having worked for many years in Germany, he trained two generations of celestial mechanicians at the discovering La Plata Observatory before returning to his native country. The official naming citation was published by the Minor Planet Center on 1 August 1980 (M.P.C. 5449). References 2017-03-19 last obs. JPL Small-Body Database Browser: 1688 Wilkens (1951 EQ1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001688 https://web.archive.org/web/20161222223304/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001688 22 December 2016 Jet Propulsion Laboratory 6 June 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 134 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1689 (1688) Wilkens 1688 Wilkens (1951 EQ1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1688 22 December 2016 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 22 December 2016 Asteroid 1688 Wilkens – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1688+Wilkens#Asteroid%201688%20WilkensEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 https://web.archive.org/web/20201107151532/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1688+Wilkens#Asteroid%201688%20WilkensEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 7 November 2020 dead D. Nesvorný M. Broz V. Carruba December 2014 Identification and Dynamical Properties of Asteroid Families Asteroids IV 297–321 2015aste.book..297N 10.2458/azu_uapress_9780816532131-ch016 1502.01628 978-0-8165-3213-1 1688 22 December 2016 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 Franco, Lorenzo April 2012 Lightcurve Photometry of 1688 Wilkens http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39...50F The Minor Planet Bulletin 39 2 50 1052-8091 2012MPBu...39...50F 22 December 2016 6 Adam Waszczak Chan-Kao Chang Eran O. Ofek Russ Laher Frank Masci David Levitan Jason Surace Yu-Chi Cheng Wing-Huen Ip Daisuke Kinoshita George Helou Thomas A. Prince Shrinivas Kulkarni September 2015 Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W The Astronomical Journal 150 3 35 2015AJ....150...75W 10.1088/0004-6256/150/3/75 1504.04041 22 December 2016 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 22 December 2016 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 22 December 2016 External links Franco, L. (2011) Balzaretto Observatory (A81) 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/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1688 1687 Glarona 1688 1689 Floris-Jan 001688 Category:Discoveries by Miguel Itzigsohn Category:Named minor planets 19510303