1857 Parchomenko

Stony asteroid and suspected binary October 2019 yes 1857 Parchomenko #D6D6D6 30 August 1971 T. Smirnova Crimean Astrophysical Obs. (1857) Parchomenko 1971 QS 11931 XT1941 WJ1974 OE 1 Praskoviya Parchomenko(Russian astronomer) main-belt(inner) 4 September 2017 (JD 2458000.5) 0 85.42 yr (31,198 days) 2.5459 AU 1.9414 AU 2.2436 AU 0.1347 3.36 yr (1,228 days) 199.01° 0.2933 ms / day 4.4006° 236.05° 174.05° 7.986 0.2018.513 0.184 km9.84 km (calculated) 3.08 0.01 h3.1177 0.0001 h 0.20 (assumed)0.2952 0.05800.333 0.053 SMASS = SS 12.312.4 1857 Parchomenko, provisional designation 1971 QS 1, is a stony asteroid and suspected binary from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 30 August 1971, by Russian astronomer Tamara Smirnova at Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula, and named after astronomer Praskoviya Parchomenko. Orbit and classification Parchomenko orbits the Sun in the inner main-belt at a distance of 1.9–2.5 AU once every 3 years and 4 months (1,228 days). Its orbit has an eccentricity of 0.13 and an inclination of 4° with respect to the ecliptic. First identified as 1931 XT at Lowell Observatory, the body's first used observation was taken at Nice Observatory in 1939, extending its observation arc by 32 years prior to its official discovery observation at Nauchnyj. Physical characteristics In the SMASS classification, Parchomenko is a common S-type asteroid. Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Parchomenko measures 7.99 and 9.84 kilometers in diameter, and its surface has an albedo of 0.295 and 0.333, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 8.5 kilometers, based on an absolute magnitude of 12.4. Rotation period In December 2005, a rotational lightcurve of Parchomenko was obtained from a photometric observations by Robert Stephens, Brian Warner and Petr Pravec. It gave a well-defined rotation period of 3.1177 hours with a brightness variation of 0.22 magnitude (U=3). Suspected binary Three possible occultation events were observed, suggesting that Parchomenko might be a binary asteroid, having a minor-planet moon as companion. However, no new findings have been made since. In October 2008, Italian amateur astronomer Silvano Casulli measured a similar period of 3.08 hours with an amplitude of 0.27 magnitude (U=3). Naming This minor planet was named in honor of Russian astronomer Praskoviya Parchomenko (1886–1970), who observed and discovered the minor planets 1129 Neujmina and 1166 Sakuntala at the Crimean Simeiz Observatory during the 1930s and 1940s. The official 1857 naming citation was published by the Minor Planet Center on 1 June 1975 (M.P.C. 3826). References 30em 2017-05-05 last obs. JPL Small-Body Database Browser: 1857 Parchomenko (1971 QS1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001857 https://web.archive.org/web/20161220105119/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001857 dead 20 December 2016 Jet Propulsion Laboratory 8 June 2017 Dictionary of Minor Planet Names – (1857) Parchomenko Schmadel Lutz D. Springer Berlin Heidelberg 149 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1858 (1857) Parchomenko 1857 Parchomenko (1971 QS1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1857 13 December 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) 2009 https://archive.org/details/dictionaryminorp2008schm limited 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 – (1857) Parchomenko Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001857 13 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001857 dead 1857 13 December 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 Robert D. Stephens Brian D. Warner Petr Pravec September 2006 1857 Parchomenko: a possible main-belt binary asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2006MPBu...33...52S The Minor Planet Bulletin 33 3 52 1052-8091 2006MPBu...33...52S 13 December 2016 6 Joseph R. Masiero T. Grav A. K. Mainzer C. R. Nugent J. M. Bauer R. Stevenson S. Sonnett August 2014 Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 13 December 2016 External links Lightcurve plot of 1857 Parchomenko, Palmer Divide Observatory, B. D. Warner (2006) 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 1857 1856 Růžena 1857 1858 Lobachevskij 001857 Category:Discoveries by Tamara Mikhaylovna Smirnova Category:Named minor planets 001857 19710830