1020 Arcadia

Main-belt asteroid March 2018 yes 1020 Arcadia #D6D6D6 K. Reinmuth Heidelberg Obs. 7 March 1924 (1020) Arcadia 1924 QV1954 UA 21975 EQ1977 QO 2 ɑr ˈ k eɪ d i əArcadian Arcadia (Greek region) main-belt(middle)Agnia 23 March 2018 (JD 2458200.5) 0 93.89 yr (34,293 d) 2.9152 AU 2.6666 AU 2.7909 AU 0.0445 4.66 yr (1,703 d) 18.189° 0.2114 ms / day 4.0598° 180.71° 37.691° 10.067 0.090 km10.415 0.123 km13.02 0.49 km21.16 km (calculated) 17.02 0.02 h 0.057 (assumed)0.150 0.0230.2364 0.0456 SMASS SSS(SDSS-MFB) 12.012.1012.29 0.11 1020 Arcadia, provisional designation 1924 QV, is a stony Agnia asteroid from the central regions of the asteroid belt, approximately 11 km mi off 1 us in diameter. It was discovered on 7 March 1924, by German astronomer Karl Reinmuth at the Heidelberg Observatory in Heidelberg, Germany. The asteroid was named after the Greek region of Arcadia. Orbit and classification Arcadia is a member of the Agnia family (514), a very large family of stony asteroids with more than 2000 known members. They most likely formed from the breakup of a basalt object, which in turn was spawned from a larger parent body that underwent igneous differentiation. The family's parent body and namesake is the asteroid 847 Agnia. It orbits the Sun in the central main-belt at a distance of 2.7–2.9 AU once every 4 years and 8 months (1,703 days; semi-major axis of 2.79 AU). Its orbit has an eccentricity of 0.04 and an inclination of 4° with respect to the ecliptic. The body's observation arc begins at Heidelberg in March 1924, six days after its official discovery observation. Physical characteristics In the SMASS classification, Arcadia is a common, stony S-type asteroid. It has been characterized as an S-type by Pan-STARRS photometric survey, as well as by SDSS-MFB (Masi Foglia Bus). Rotation period In November 2011, a fragmentary rotational lightcurve of Arcadia was obtained from photometric observations by Gordon Gartrelle at the University of North Dakota. Lightcurve analysis gave a rotation period of 17.02 hours with a brightness amplitude of 0.05 magnitude (U=1). As of 2018, no secure period has been obtained. Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Arcadia measures between 10.067 and 13.02 kilometers in diameter and its surface has an albedo between 0.150 and 0.2364. The Collaborative Asteroid Lightcurve Link assumes an albedo 0.057, i.e. an albedo for a carbonaceous rather than for a stony asteroid, and consequently calculates a much larger diameter of 21.16 kilometers based on an absolute magnitude of 12.1. It may be speculated whether this anomaly is a glitch in the data base. Naming This minor planet was named after the Greek region of Arcadia in central Peloponnese. It is also a celebrated mythological region, where the shepherd god Pan lived. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 97). References 30em 2018-01-27 last obs. JPL Small-Body Database Browser: 1020 Arcadia (1924 QV) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001020 Jet Propulsion Laboratory 8 March 2018 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 88 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1021 (1020) Arcadia 1020 Arcadia (1924 QV) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1020 8 March 2018 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 March 2018 Asteroid 1020 Arcadia – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1020+Arcadia 24 October 2019 https://web.archive.org/web/20201003194139/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1020+Arcadia 3 October 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 Jessica M. Sunshine Schelte J. Bus Timothy J. McCoy Thomas H. Burbine Catherine M. Corrigan Richard P. Binzel August 2004 High-calcium pyroxene as an indicator of igneous differentiation in asteroids and meteorites https://www.researchgate.net/publication/228936637 Meteoritics and Planetary Science 39 8 1343–1357 2004M&PS...39.1343S 10.1111/j.1945-5100.2004.tb00950.x 8 March 2018 1020 8 March 2018 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 8 March 2018 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 Gartrelle, Gordon M. April 2012 Lightcurve Results for Eleven Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39...40G The Minor Planet Bulletin 39 2 40–46 1052-8091 2012MPBu...39...40G 8 March 2018 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 8 March 2018 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 1020 1019 Strackea 1020 1021 Flammario 001020 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001020 19240307