1493 Sigrid

Dark asteroid October 2019 yes 1493 Sigrid #D6D6D6 001493-asteroid shape model (1493) Sigrid.png Shape of Sigrid modelled from its lightcurve E. Delporte Uccle Obs. 26 August 1938 (1493) Sigrid 1938 QB1934 NB 11934 PW1957 UT1961 TM 11961 XL1977 UNA908 WAA916 YD Sigrid Strömgren(wife of astronomer)Bengt Strömgren main-belt(inner)Nysa–Polana complex 4 September 2017 (JD 2458000.5) 0 108.52 yr (39,636 days) 2.9175 AU 1.9416 AU 2.4295 AU 0.2009 3.79 yr (1,383 days) 318.09° 0.2603 ms / day 2.5772° 330.58° 1.6890° 22.111 0.200 km22.93 6.77 km23 2 km23.76 3.46 km24.03 2.1 km24.92 8.61 km25.10 0.42 km27.8 5.6 km28.905 0.401 km 22.68 0.02 h43.179 0.005 h43.1795 0.0001 h43.296 0.048 h 0.034 0.0070.036 0.0670.0398 0.00280.04 0.020.04 0.030.048 0.0020.0489 0.0100.05 0.01 Tholen FSMASS XcPB–V 0.643U–B 0.225 11.9912.2412.35 0.23 1493 Sigrid, provisional designation 1938 QB, is a dark asteroid from the inner regions of the asteroid belt, approximately 24 kilometers in diameter. It was discovered on 26 August 1938, by Belgian astronomer Eugène Delporte at the Royal Observatory of Belgium in Uccle. It was named after Sigrid Strömgren, wife of astronomer Bengt Strömgren. Orbit and classification Sigrid is a member of the Nysa–Polana complex, a collection of overlapping asteroid families in the inner main belt near the Kirkwood gap at the 3:1 orbital resonance with Jupiter.23 It orbits the Sun in the inner main-belt at a distance of 1.9–2.9 AU once every 3 years and 9 months (1,383 days). Its orbit has an eccentricity of 0.20 and an inclination of 3° with respect to the ecliptic. The asteroid was first identified as A908 WA at Heidelberg Observatory in November 1908. The body's observation arc begins with its official discovery observation at Uccle in August 1938. Physical characteristics Spectral type In the Tholen classification, Sigrid is an F-type asteroid (which agrees with the overall spectral type of the Polanian subgroup). In the SMASS classification, it is a Xc-subtype, which transitions between the X- and C-type asteroids. It has also been characterized as a primitive P-type asteroid by the Wide-field Infrared Survey Explorer (WISE). Photometry Rotation period an amplitude In August 2006, a rotational lightcurve of Sigrid was obtained from photometric observations at the Mount Tarana and Cecil Observatory in NSW, Australia. Lightcurve analysis gave a rotation period of 43.296 hours with a brightness variation of 0.6 magnitude (U=2). In October 2010, Raymond Poncy found a period of 22.68 hours (or half the previous period solution) and an amplitude of 0.38 magnitude (U=2-). While not being a slow rotator, the body's period is significantly longer than the typical 2 to 20 hours seen among the majority of asteroids. Spin axis The asteroids lightcurve has also been modeled, using photometric data from the Lowell Photometric Database (LPD) and other sources. Modelling gave a concurring period of 43.179 and 43.1795 hours, as well as two spin axis of (183.0°, 69°) and (350.0°, 69°) in ecliptic coordinates (λ, β). Diameter and albedo According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's WISE telescope, Sigrid measures between 22.111 and 28.905 kilometers in diameter and its surface has a low albedo between 0.034 and 0.05. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is an albedo of 0.0489 and a diameter of 24.03 kilometers based on an absolute magnitude of 11.99. Naming This minor planet was named after Sigrid Strömgren, wife of the Danish-American astronomer Bengt Strömgren, after whom the asteroid 1846 Bengt was named. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 134; RI 2297). References 30em 2017-06-05 last obs. JPL Small-Body Database Browser: 1493 Sigrid (1938 QB) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001493 Jet Propulsion Laboratory 19 October 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 119 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1494 (1493) Sigrid 1493 Sigrid (1938 QB) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1493 19 October 2017 Asteroids and comets rotation curves – (1493) Sigrid Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001493 19 October 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001493 dead 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 19 October 2017 Asteroid 1493 Sigrid – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1493+Sigrid#Asteroid%201493%20SigridEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 26 October 2019 October 2026 InternetArchiveBot 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 9780816532131 1493 19 October 2017 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 19 October 2017 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 19 October 2017 6 C. R. Nugent A. Mainzer J. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. 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Wright September 2016 NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos The Astronomical Journal 152 3 12 2016AJ....152...63N 10.3847/0004-6256/152/3/63 1606.08923 free 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 free (online, AcuA catalog p. 153) 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 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 Colin Bembrick Jeff Byron March 2007 A Rotation Period for 1493 Sigrid http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2007MPBu...34....1B The Minor Planet Bulletin 34 1 1 1052-8091 2007MPBu...34....1B 19 October 2017 6 J. Hanus M. Broz J. Durech B. D. Warner J. Brinsfield R. Durkee D. Higgins R. A. Koff J. Oey F. Pilcher R. Stephens L. P. Strabla Q. Ulisse R. Girelli November 2013 An anisotropic distribution of spin vectors in asteroid families http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013A&A...559A.134H Astronomy and Astrophysics 559 19 2013A&A...559A.134H 10.1051/0004-6361/201321993 1309.4296 19 October 2017 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 19 October 2017 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 19 October 2017 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 1493 1492 Oppolzer 1493 1494 Savo 001493 Category:Discoveries by Eugène Joseph Delporte Category:Named minor planets 001493 001493 19380826