1695 Walbeck

Carbonaceous main-belt asteroid October 2019 yes 1695 Walbeck #D6D6D6 15 October 1941 L. Oterma Turku Obs. (1695) Walbeck 1941 UO1964 QA1964 RE Henrik Walbeck (geodesist) main-belt(middle) 4 September 2017 (JD 2458000.5) 0 75.44 yr (27,554 days) 3.5921 AU 1.9703 AU 2.7812 AU 0.2916 4.64 yr (1,694 days) 141.65° 0.2125 ms / day 16.705° 218.46° 139.42° 17.88 0.27 km18.953 0.258 km19.60 km (derived)19.62 0.8 km19.84 0.29 km 5.16 0.05 h5.1607 0.0006 h5.3 h 0.037 0.0070.042 0.0060.0425 0.00580.0460 (derived)0.0504 0.0050.051 0.002 SMASS = CgC 12.412.512.76 0.2312.93 1695 Walbeck, provisional designation 1941 UO, is a carbonaceous asteroid from the central region of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 15 October 1941, by Finnish astronomer Liisi Oterma at Turku Observatory in Southwest Finland, and named after Henrik Walbeck. Classification and orbit The asteroid orbits the Sun in the central main-belt at a distance of 2.0–3.6 AU once every 4 years and 8 months (1,694 days). Its orbit has an eccentricity of 0.29 and an inclination of 17° with respect to the ecliptic. Walbecks observation arc begins the night after its official discovery observation. Physical characteristics In the SMASS taxonomy, the carbonaceous asteroid is characterized as a Cg-type, an intermediate between the C-type and G-type asteroids. Lightcurves In November 2006, a rotational lightcurve of Walbeck was obtained from photometric observations by French amateur astronomer Pierre Antonini. It gave a rotation period of 5.1607 hours with a brightness variation of 0.22 magnitude (U=3). Two similar periods were obtained by David Romeuf and by a team of Hungarian astronomers (U=2/2). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Walbeck measures between 17.88 and 19.62 kilometers in diameter and its surface has an albedo between 0.037 and 0.051. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.046 and a diameter of 19.60 kilometers based on an absolute magnitude of 12.5. Naming The minor planet was named in memory of Finnish scientist Henrik Johan Walbeck (1793–1822), astronomer and geodesist at the old Academia Aboensis who used the method of least squares to derive a good value for the Earth's flattening. The official naming citation was published by the Minor Planet Center on 1 April 1980 (M.P.C. 5281). References 2017-03-24 last obs. JPL Small-Body Database Browser: 1695 Walbeck (1941 UO) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001695 Jet Propulsion Laboratory 6 June 2017 Dictionary of Minor Planet Names – (1695) Walbeck Schmadel Lutz D. Springer Berlin Heidelberg 135 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1696 (1695) Walbeck 1695 Walbeck (1941 UO) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1695 17 December 2016 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 17 December 2016 Asteroids and comets rotation curves – (1695) Walbeck Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001695 17 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001695 dead 1695 17 December 2016 E. F. Tedesco P. V. Noah M. Noah S. D. Price October 2004 IRAS Minor Planet Survey V6.0 https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab NASA Planetary Data System 12 IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 22 October 2019 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 (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 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 17 December 2016 6 P. Székely L. L. Kiss Gy. M. Szabó K. Sárneczky B. Csák M. Váradi Sz. Mészáros August 2005 CCD photometry of 23 minor planets http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2005P&SS...53..925S Planetary and Space Science 53 9 925–936 2005P&SS...53..925S 10.1016/j.pss.2005.04.006 astro-ph/0504462 17 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 17 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 17 December 2016 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/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 1695 1694 Kaiser 1695 1696 Nurmela Category:Background asteroids Walbeck Walbeck Category:Cg-type asteroids (SMASS) 19411015