1312 Vassar

Carbonaceous Alauda asteroid October 2019 yes 1312 Vassar #D6D6D6 001312-asteroid shape model (1312) Vassar.png Modelled shape of Vassar from its lightcurve 27 July 1933 G. van Biesbroeck Yerkes Obs. (1312) Vassar 1933 OT1944 QEA908 CD Vassar College(Vassar Observatory) main-belt(outer)Alauda 4 September 2017 (JD 2458000.5) 0 83.67 yr (30,562 days) 3.7605 AU 2.4268 AU 3.0937 AU 0.2156 5.44 yr (1,988 days) 104.98° 0.1811 ms / day 21.901° 129.45° 261.33° 27.56 6.84 km32.70 1.29 km36.28 1.1 km (IRAS:6)36.32 km (derived) 7.93189 0.00001 h7.93190 0.00005 h7.932 0.002 hLCDB-Higgins-2011 0.0643 0.004 (IRAS:6)0.0703 (derived)0.081 0.0070.09 0.07 C 10.6810.710.76 0.4410.80 1312 Vassar, provisional designation 1933 OT, is a carbonaceous Alauda asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 27 July 1933, by Belgian–American astronomer George Van Biesbroeck at Yerkes Observatory in Wisconsin, United States. The asteroid was named for the American Vassar College. Orbit and classification Vassar is a member of the Alauda family (902), a large family of typically bright carbonaceous asteroids and named after its parent body, 702 Alauda.23 It orbits the Sun in the outer main-belt at a distance of 2.4–3.8 AU once every 5 years and 5 months (1,988 days). Its orbit has an eccentricity of 0.22 and an inclination of 22° with respect to the ecliptic. In 1908, it was first identified as A908 CD at Heidelberg Observatory. The body's observation arc begins with its official discovery observation at Yerkes in 1933. Physical characteristics Rotation period and pole In November 2011 American amateur astronomer David Higgins obtained a rotational lightcurve of Vassar from photometric observations taken at the Hunters Hill Observatory (E14) in Australia. It gave a well-defined rotation period of 7.932 hours with a brightness variation of 0.35 magnitude (U=3).LCDB-Higgins-2011 In 2016, two modeled lightcurves were derived using data from the Lowell photometric database and other sources, giving a concurring period of 7.93189 and 7.93190 hours and a spin axis of (104.0°, −50°) and (251.0°, −23.0°) in ecliptic coordinates, respectively (U=n.a.). 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, Vassar measures between 27.56 and 36.28 kilometers in diameter, and its surface has an albedo between 0.064 and 0.09. The Collaborative Asteroid Lightcurve Link agrees with the results obtained by IRAS and derives an albedo of 0.0703 and a diameter of 36.32 kilometers with an absolute magnitude of 10.7. Naming This minor planet was named by American astronomer Maud Worcester Makemson (1891–1977) after the U.S Vassar College (formerly: Vassar Female College), located in New York state. Makemson, who computed the asteroid's orbit, was a teacher at the private elite school and director of its Vassar College Observatory. Naming citation was first published in The Names of the Minor Planets by Paul Herget in 1955 (H 120). Notes LCDB-Higgins-2011 Higgins (2011) web: rotation period 7.932 0.002 hours with a brightness amplitude of 0.35 mag. Summary figures for (1312) Vassar at Collaborative Asteroid Lightcurve Link (CALL) and Asteroid lightcurves at the Hunters Hill Observatory Higgins, D.J. (2011) References 30em 2017-03-30 last obs. JPL Small-Body Database Browser: 1312 Vassar (1933 OT) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001312 Jet Propulsion Laboratory 25 July 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 107 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1313 (1312) Vassar 1312 Vassar (1933 OT) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1312 16 January 2017 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 Asteroid 1312 Vassar – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1312+Vassar#Asteroid%201312%20VassarEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 D. Nesvorný M. Broz V. 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Wolf February 2016 New and updated convex shape models of asteroids based on optical data from a large collaboration network http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...586A.108H Astronomy and Astrophysics 586 24 2016A&A...586A.108H 10.1051/0004-6361/201527441 16 January 2017 1510.07422 119112278 J. Durech J. Hanus D. Oszkiewicz R. Vanco March 2016 Asteroid models from the Lowell photometric database http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...587A..48D Astronomy and Astrophysics 587 6 2016A&A...587A..48D 10.1051/0004-6361/201527573 1601.02909 118427201 16 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 16 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 1312 1311 Knopfia 1312 1313 Berna No Collapse 001312 Category:Discoveries by George Van Biesbroeck Category:Named minor planets 19330727