1626 Sadeya

Main-belt asteroid binary October 2019 yes 1626 Sadeya #D6D6D6 J. Comas Solà Fabra Obs. 10 January 1927 (1626) Sadeya 1927 AA1956 AA Spanish and American Astronomical Society main-beltPhocaea 17 December 2020 (JD 2459200.5) 0 94.02 yr (34,339 d) 3.0090 AU 1.7185 AU 2.3638 AU 0.2730 3.63 yr (1,327 d) 335.85° 0.2712 ms / day 25.312° 279.48° 149.29° 1 (0.26Ds/Dp; P: 2.14 d) 14.25 2.36 km14.77 0.19 km15.140 0.490 km15.95 km (calculated) 3.414 0.005 h3.418 0.0013.419 0.001 h3.420 0.001 h3.4200 0.0006 h3.42048 0.00005 h3.438 0.009 h 0.23 (assumed)0.30 0.160.486 0.0670.512 0.016 S 10.5011.1011.2 1626 Sadeya (provisional designation 1927 AA) is a stony Phocaea asteroid and binary system from the inner regions of the asteroid belt, approximately 15 km mi off 2 us in diameter. It was discovered on 10 January 1927, by Catalan astronomer Josep Comas i Solà at Fabra Observatory in Barcelona, Spain, and named after the Spanish and American Astronomical Society. The discovery of a companion was announced on 1 December 2020. Orbit and classification The stony S-type asteroid is a member of the Phocaea family (701), a group of asteroids with rather high inclinations between 18° and 32°. It orbits the Sun in the inner main-belt at a distance of 1.7–3.0 AU once every 3 years and 8 months (1,327 days; semi-major axis of 2.36 AU). Its orbit has an eccentricity of 0.27 and an inclination of 25° with respect to the ecliptic. Sadeya's observation arc begins 2 months after its official discovery with a precovery taken at Yerkes Observatory. Naming This minor planet was named after the Spanish and American Astronomical Society, also known by its acronym "S.A.D.E.Y.A." (es Sociedad Astrónomica de España y América no). It was founded by Comas i Solà, who also was its first president. The official 1626 naming citation was published by the Minor Planet Center on 30 January 1964 (M.P.C. 2277). Physical characteristics Rotation period Sadeya has a well-defined rotation period between 3.414 and 3.438 hours with a change in brightness between 0.07 and 0.22 in magnitude (U=2+/3-/3). These numerous rotational lightcurves were obtained by ESO astronomers, Julian Oey, Pierre Antonini, Ramon Naves, Enric Forné, Hilari Pallares, Brian Warner and Vladimir Benishek between 1996 and 2014. Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Sadeya measures between 14.25 and 15.14 kilometers in diameter, and its surface has an albedo between 0.30 and 0.512. The Collaborative Asteroid Lightcurve Link assumes a lower albedo of 0.23 – derived from 25 Phocaea, the namesake of the Phocaea family – and calculates a diameter of 15.95 kilometers with an absolute magnitude of 11.2. Satellite On 1 December 2020, the discovery of a satellite in orbit of Sadeya was announced by Vladimir Benishek, Petr Pravec, and several other collaborators. The minor-planet moon measures approximately 3.81 km mi off 2 us in diameter, or 26% that of its primary, and has an orbital period of about 51.3 hours. References 2021-03-10 last obs. JPL Small-Body Database Browser: 1626 Sadeya (1927 AA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001626 Jet Propulsion Laboratory 26 June 2021 Dictionary of Minor Planet Names Schmadel Lutz D. Springer Berlin Heidelberg (1626) Sadeya 129 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1627 1626 Sadeya (1927 AA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1626 26 June 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 – (1626) Sadeya Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001626 28 December 2016 1 April 2019 https://web.archive.org/web/20190401181659/http://obswww.unige.ch/~behrend/page4cou.html#001626 dead Asteroid 1626 Sadeya – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1626+Sadeya#Asteroid%201626%20SadeyaEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 October 2026 InternetArchiveBot 1626 28 December 2016 6 Fumihiko Usui Daisuke Kuroda Thomas G. Müller Sunao Hasegawa Masateru Ishiguro Takafumi Ootsubo Daisuke Ishihara Hirokazu Kataza Satoshi Takita Shinki Oyabu Munetaka Ueno Hideo Matsuhara Takashi Onaka October 2011 Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey Publications of the Astronomical Society of Japan 63 5 1117–1138 2011PASJ...63.1117U 10.1093/pasj/63.5.1117 (online, AcuA catalog p. 153) 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 28 December 2016 6 C. R. Nugent A. Mainzer J. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. Wright December 2015 NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 28 December 2016 6 M. Florczak E. Dotto M. A. Barucci M. Birlan A. Erikson M. Fulchignoni A. Nathues L. Perret P. Thebault November 1997 Rotational properties of main belt asteroids: photoelectric and CCD observations of 15 objects http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1997P&SS...45.1423F Planetary and Space Science 45 11 1423–1435 1997P&SS...45.1423F 10.1016/S0032-0633(97)00121-9 28 December 2016 Julian Oey Ric Krajewski June 2008 Lightcurve Analysis of Asteroids from Kingsgrove and Other Collaborating Observatories in the First Half of 2007 http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35...47O The Minor Planet Bulletin 35 2 47–48 1052-8091 2008MPBu...35...47O 28 December 2016 Warner, Brian D. April 2010 Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2009 September–December http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37...57W The Minor Planet Bulletin 37 2 57–64 1052-8091 2010MPBu...37...57W 28 December 2016 Warner, Brian D. July 2014 Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 January–March http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014MPBu...41..144W The Minor Planet Bulletin 41 3 144–155 1052-8091 2014MPBu...41..144W 28 December 2016 Benishek, Vladimir January 2015 Rotation Period Determinations for 1095 Tulipa, 1626 Sadeya 2132 Zhukov, and 7173 Sepkoski http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015MPBu...42...75B The Minor Planet Bulletin 42 1 75–76 1052-8091 2015MPBu...42...75B 28 December 2016 Asteroids with Satellites Database – (1626) Sadeya Johnston's Archive 14 February 2021 Johnston Wm. Robert http://www.johnstonsarchive.net/astro/astmoons/am-01626.html 26 June 2021 External links (1626) Sadeya is a binary asteroid, CBET #4893 Lightcurve plot of 1626 Sadeya, Palmer Divide Observatory, B. D. Warner (2009) 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/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Geneva Observatory, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1626 1625 The NORC 1626 1627 Ivar 001626 Category:Discoveries by Josep Comas Solà Category:Named minor planets 001626 19270110