2006 Polonskaya

Main-belt asteroid binary October 2019 yes 2006 Polonskaya #D6D6D6 N. Chernykh 22 September 1973 Crimean Astrophysical Obs. (2006) Polonskaya 1973 SB 31941 SD1948 QH1966 VC Elena Polonskaïa(Russian astronomer) main-beltFlora 17 December 2020 (JD 2459200.5) 0 70.93 yr (25,909 d) 2.7721 AU 1.8777 AU 2.3249 AU 0.1923 3.55 yr (1,295 d) 107.39° 0.2780 ms / day 4.9106° 0.8717° 24.849° 1 4.625 0.163 km4.804 km 1.6 g/cm3 (est.) 3.1183 h 0.34980.354 0.096 S (family-based) 13.08 Satellite D. Pray, P. Pravec, P. Kušnirák, W. Cooney, J. Gross, and D. Terrell 1 November 2005 Light curve 8.5 km 0.7979 0.0008 d(19 hours, 9 ± 1 minutes) 13 mas (maximum) 2006 Polonskaya 0.5 km3 (est.) 0.99 km 6.6571 0.0002 h <3.3 fainter than primary 18.1 2006 Polonskaya (provisional designation: 1973 SB 3) is a stony Flora asteroid and asynchronous binary system from the inner regions of the asteroid belt, approximately 5 km mi off 2 us in diameter. It was discovered on 22 September 1973, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula, and later named after Ukrainian astronomer Elena Kazimirtchak-Polonskaïa. Its one-kilometer-sized satellite was discovered by an international collaboration of astronomers in November 2005. Classification and orbit Polonskaya is a member of the Flora family, one of the largest collisional populations of stony asteroids, when applying the synthetic hierarchical clustering method (HCM) by Nesvorný. However, according to another HCM-analysis by Milani and Knežević (AstDys), it is a background asteroid as in this analysis the Flora asteroid clan is not recognized. Polonskaya orbits the Sun in the inner main-belt at a distance of 1.9–2.8 AU once every 3 years and 7 months (1,295 days; semi-major axis of 2.32 AU). Its orbit has an eccentricity of 0.19 and an inclination of 5° with respect to the ecliptic. On 16 September 1941, it was first observed at the Finnish Turku Observatory in Finland. The body's observation arc begins in April 1950 at Palomar Mountain, about 23 years prior to its official discovery observation. Naming This minor planet was named after Russian astronomer Elena Ivanovna Kazimirchak-Polonskaya (1902–1992), who researched the motion and orbital evolution of comets, in particular the capture of comets by major planets. She was a member of IAU's Commission XX, and was awarded the F. A. Bredikhin prize. The official 2006 naming citation was published by the Minor Planet Center on 1 September 1978 (M.P.C. 4481). Satellite In 2005, it was claimed that lightcurve observations indicate that Polonskaya has a small moon about 0.99 km in diameter. However, the non-synchronously rotating binary still needs to be fully resolved in order to confirm such satellite. Alternatively, the presence of another body has also been suggested to explain the lightcurve's irregular period, which would make it a triple asteroid. Physical characteristics Polonskaya is considered a stony S-type asteroid with a typically high albedo due to its membership to the Flora family. Lightcurves Between 2005 and 2010, several rotational lightcurves of Polonskaya were obtained from photometric observations by Donald Pray, Petr Pravec, Peter Kušnirák, Walter Cooney, John Gross and Dirk Terrell. Lightcurve analysis gave a rotation period between 3.114 and 3.1183 hours with a brightness amplitude of 0.18–0.10 magnitude for the best rated results (U=3/3/3/3). A later retracted alternative period solution of 6.69 0.01 h (about twice as long) has also been proposed. In September 2019, follow-up observations by Pravec gave an unchanged rotation period of 3.1181 0.0005 h (U=3). Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Polonskaya measures 4.625 kilometers in diameter and its surface has an albedo of 0.354. The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE-data, that is, an albedo of 0.3498 and a diameter of 4.80 kilometers based on an absolute magnitude of 13.35. References 30em 2017-04-30 last obs. JPL Small-Body Database Browser: 2006 Polonskaya (1973 SB3) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002006 Jet Propulsion Laboratory 29 June 2017 Dictionary of Minor Planet Names (2006) Polonskaya Schmadel Lutz D. Springer Berlin Heidelberg 162 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_2007 2006 Polonskaya (1973 SB3) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=2006 15 May 2021 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 2009dmpn.book.....S Asteroids and comets rotation curves – (2006) Polonskaya Behrend Raoul Geneva Observatory https://obswww.unige.ch/~behrend/page4cou.html#002006 29 June 2017August 2026 InternetArchiveBot 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 2006 15 May 2001 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 Petr Pravec Alan W. Harris Peter Kusnirák Adrián Galád Kamil Hornoch September 2012 Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P Icarus 221 1 365–387 2012Icar..221..365P 10.1016/j.icarus.2012.07.026 29 June 2017 D. Pray P. Pravec P. Kusnirak W. Cooney J. Gross D. Terrell November 2005 (2006) Polonskaya https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2005IAUC.8630....3P IAU Circ. 8630 3 2005IAUC.8630....3P 29 June 2017 6 P. Pravec P. Scheirich D. Vokrouhlický A. W. Harris P. Kusnirák K. Hornoch D. P. Pray D. Higgins A. Galád J. Világi S. Gajdos L. Kornos J. Oey M. Husárik W. R. Cooney J. Gross D. Terrell R. Durkee J. Pollock D. E. Reichart K. Ivarsen J. Haislip A. LaCluyze Yu. N. Krugly N. Gaftonyuk R. D. Stephens R. Dyvig V. Reddy V. Chiorny O. Vaduvescu Longa-Peñ P. a A. Tudorica B. D. Warner G. Masi J. Brinsfield Gonç R. alves P. Brown Z. Krzeminski O. Gerashchenko V. Shevchenko I. Molotov F. Marchis March 2012 Binary asteroid population. 2. Anisotropic distribution of orbit poles of small, inner main-belt binaries https://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..218..125P Icarus 218 1 125–143 2012Icar..218..125P 10.1016/j.icarus.2011.11.026 Johnston Robert (2006) Polonskaya 21 September 2014 https://www.johnstonsarchive.net/astro/astmoons/am-02006.html johnstonsarchive.net 28 May 2015 IAUC 8630, 2006 Central Bureau for Astronomical Telegrams 16 November 2005 http://www.cbat.eps.harvard.edu/iauc/08600/08630.html#Item3 23 August 2016(ADS) Asteroid 2006 Polonskaya – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=2006+Polonskaya#Asteroid%202006%20PolonskayaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 15 May 2021 Asteroid 2006 Polonskaya – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=2006 15 May 2021 External links Asteroids with Satellites, Robert Johnston, johnstonsarchive.net Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR https://web.archive.org/web/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Geneva Observatory, Raoul Behrend 2005 Hencke 2006 2007 McCuskey 002006 Category:Discoveries by Nikolai Chernykh Category:Named minor planets 002006 19730922 20051101