1781 Van Biesbroeck

Vesta asteroid October 2019 yes 1781 Van Biesbroeck #D6D6D6 001781-asteroid shape model (1781) Van Biesbroeck.png Van Biesbroeck modeled from its lightcurve 17 October 1906 A. Kopff Heidelberg Obs. (1781) Van Biesbroeck A906 UB1954 SZ1958 VP1969 TM 2 George Van Biesbroeck(astronomer) main-beltVestian 4 September 2017 (JD 2458000.5) 0 110.55 yr (40,377 days) 2.6541 AU 2.1355 AU 2.3948 AU 0.1083 3.71 yr (1,354 days) 330.79° 0.2659 ms / day 6.9497° 44.630° 342.83° 8.500 0.1269 km (estimate at 0.20) 0.203 0.023 XS 12.7512.8 1781 Van Biesbroeck (prov. designation: A906 UB) is a Vesta asteroid from the inner regions of the asteroid belt, approximately 8.5 kilometers in diameter. It was discovered on 17 October 1906, by German astronomer August Kopff at Heidelberg Observatory in southern Germany. It was named after astronomer George Van Biesbroeck. Orbit and classification Van Biesbroeck orbits the Sun in the inner main-belt at a distance of 2.1–2.7 AU once every 3 years and 9 months (1,354 days). Its orbit has an eccentricity of 0.11 and an inclination of 7° with respect to the ecliptic. It is not known whether the member of the Vesta family of asteroids is in fact a V/J-type, or if it is an unrelated interloper, as currently assumed to be more likely. The asteroid's observation arc begins with its official discovery observation, as no precoveries were taken, and no previous identifications were made. Physical characteristics According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Van Biesbroeck measures 8.5 kilometers in diameter, and its surface has an albedo of 0.203. A generic absolute magnitude-to-diameter conversion gives an inferred diameter between 8 and 14 kilometers, assuming an albedo in the range of 0.05 to 0.25 for an absolute magnitude of 12.8. As of 2017, Van Biesbroecks composition, rotation period and shape remain unknown. Naming This minor planet was named after renowned Belgian–born observational astronomer George Van Biesbroeck, who naturalized as U.S. citizens in 1922. He specialized in the observation of double stars, variable stars, comets and asteroids, of which he discovered sixteen at the U.S. Yerkes Observatory in Williams Bay, Wisconsin, between 1922 and 1939. The official 1781 naming citation was published by the Minor Planet Center on 1 January 1974 (M.P.C. 3569). In 1961, he published the Van Biesbroeck's star catalog of low-mass, low-luminosity stars. The mountain Van Biesbroeck near the McDonald Observatory, the lunar crater Van Biesbroeck, and most notably the red dwarf Van Biesbroeck's Star, were also named in his honour. (There are very few stars named after people). The George Van Biesbroeck Prize, awarded by the American Astronomical Society for achievements in astronomy, also bears his name. References 30em 2017-05-04 last obs. JPL Small-Body Database Browser: 1781 Van Biesbroeck (A906 UB) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001781 Jet Propulsion Laboratory 1 July 2017 Dictionary of Minor Planet Names – (1781) Van Biesbroeck Schmadel Lutz D. Springer Berlin Heidelberg 142 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1782 (1781) van Biesbroeck 1781 Van Biesbroeck (A906 UB) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1781 15 May 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 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 Absolute Magnitude (H) NASA/JPL http://neo.jpl.nasa.gov/glossary/h.html https://web.archive.org/web/20010302182040/http://neo.jpl.nasa.gov/glossary/h.html dead 2 March 2001 15 May 2016 Moskovitz Nicholas A. The Distribution of Basaltic Asteroids in the Main Belt Icarus 198 1 77–90 0807.3951 2008 2008Icar..198...77M 10.1016/j.icarus.2008.07.006 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 8 December 2016 1209.5794 1781 6 April 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 1781 1780 Kippes 1781 1782 Schneller 001781 Category:Discoveries by August Kopff Category:Named minor planets 19061017