1768 Appenzella

Main-belt asteroid October 2019 yes 1768 Appenzella #D6D6D6 001768-asteroid shape model (1768) Appenzella.png Shape model of Appenzella from its lightcurve 23 September 1965 P. Wild Zimmerwald Obs. (1768) Appenzella 1965 SA1934 PM1942 TH Appenzell (canton) main-beltNysa–Polana complex 4 September 2017 (JD 2458000.5) 0 74.56 yr (27,232 days) 2.8899 AU 2.0141 AU 2.4520 AU 0.1786 3.84 yr (1,402 days) 175.69° 0.2567 ms / day 3.2582° 12.423° 19.718° 19.0 1.9 km19.30 0.17 km20.221 0.129 km20.86 2.3 km (IRAS:2)21 2 km 5.18335 0.00001 h5.1839 0.0001 h 0.03 0.010.032 0.0070.0338 0.009 (IRAS:2)0.039 0.0080.04 0.01 F (Tholen)C (SMASS)B–V = 0.615U–B = 0.230 12.70 1768 Appenzella (prov. designation: 1965 SA) is an asteroid from the inner regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 23 September 1965, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland. It was later named after the Swiss canton of Appenzell. Classification and orbit Appenzella is a dark carbonaceous asteroid and a member of the Nysa–Polana complex, a collection of overlapping asteroid families. On the Tholen taxonomic scheme, it belongs to the small group of 28 bodies known to have a F-type spectrum. It orbits the Sun in the inner main-belt at a distance of 2.0–2.9 AU once every 3 years and 10 months (1,402 days). Its orbit has an eccentricity of 0.18 and an inclination of 3° with respect to the ecliptic. The first usedDecember 2023 observation was made at the Finnish Turku Observatory in 1942, extending the asteroid's observation arc by 23 years prior to its discovery. Lightcurve In November 2011, a rotational lightcurve of Appenzella was obtained by French astronomer René Roy at his Blauvac Observatory (627) in southeastern France. Lightcurve analysis gave a well-defined rotation period of 5.1839 hours with a brightness variation of 0.53 magnitude (U=3). In 2016, remodeled photometric data from the Lowell database gave in a very similar period of 5.18335 hours. Diameter and albedo Based on the surveys carried out by NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, the asteroid measures between 19.0 and 21 kilometers in diameter and its surface has a low albedo between 0.03 and 0.04. The Collaborative Asteroid Lightcurve Link agrees with the results obtained by the Infrared Astronomical Satellite, IRAS, which found an albedo of 0.034 and a mean diameter of 20.9 kilometers, with an absolute magnitude of 12.7. Naming In 1971, Appenzella was named by the discoverer in honor of the rural Swiss canton of Appenzell, during the celebration of the 150th anniversary of the public middle school "Kantonsschule Trogen", Appenzell Ausserrhoden, founded in 1821. The official 1768 naming citation was published by the Minor Planet Center on 1 July 1972 (M.P.C. 3297). References 2017-03-30 last obs. JPL Small-Body Database Browser: 1768 Appenzella (1965 SA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001768 Jet Propulsion Laboratory 1 July 2017 Dictionary of Minor Planet Names – (1768) Appenzella Schmadel Lutz D. Springer Berlin Heidelberg 141 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1769 (1768) Appenzella 1768 Appenzella (1965 SA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1768 10 August 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 Asteroids and comets rotation curves – (1768) Appenzella Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001768 10 August 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001768 dead Kanstonsschule Trogen http://www.kst.ch/startseite.html Kantonsschule Trogen German 2014 14 January 2016 https://archive.today/20150525035311/http://www.kst.ch/startseite.html 25 May 2015 JPL Small-Body Database Search Engine: [ spec. type = F (Tholen)] JPL Solar System Dynamics http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;OBJ_field=0;ORB_field=0;combine_mode=OR;c1_group=OBJ;c1_item=Ay;c1_op=%3D;c1_value=F;c2_group=OBJ;c2_item=Ax;c2_op=%3D;c2_value=F;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsAiArApAxAy;.cgifields=format_option;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=combine_mode;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=com_orbit_class&query=1&c_sort=AcA 10 August 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 1768 10 August 2016 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 10 August 2016 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 V. Alí-Lagoa J. de León J. Licandro M. Delbó H. Campins N. Pinilla-Alonso M. S. Kelley June 2013 Physical properties of B-type asteroids from WISE data http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013A&A...554A..71A Astronomy and Astrophysics 554 16 2013A&A...554A..71A 10.1051/0004-6361/201220680 1303.5487 10 August 2016 6 V. Alí-Lagoa J. Licandro R. Gil-Hutton Cañ M. ada-Assandri M. Delbo' J. de León H. Campins N. Pinilla-Alonso M. S. P. Kelley J. Hanus June 2016 Differences between the Pallas collisional family and similarly sized B-type asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...591A..14A Astronomy and Astrophysics 591 11 2016A&A...591A..14A 10.1051/0004-6361/201527660 10 August 2016 free 11336/63614 free 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 10 August 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 8 December 2016 External links Image from SDSS survey, 1.55au from Earth on 15DEC2004 Fermats Brother https://web.archive.org/web/20111004094600/http://casjobs.sdss.org/ImgCutoutDR6/getjpeg.aspx?ra=137.09276&dec=21.43212&scale=0.09903175&width=800&height=200&opt=L&query=&Label=on 4 October 2011 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 1768 1767 Lampland 1768 1769 Carlostorres Category:Nysa–Polana complex Appenzella Appenzella Category:C-type asteroids (SMASS) Category:F-type asteroids (Tholen) 19650923