1424 Sundmania

Large asteroid and rather slow rotator October 2019 yes 1424 Sundmania #D6D6D6 001424-asteroid shape model (1424) Sundmania.png Shape model of Sundmania from its lightcurve Y. Väisälä Turku Obs. 9 January 1937 (1424) Sundmania 1937 AJ1929 SS1929 UB1931 AD1938 FPA918 WA Karl F. Sundman(Finnish mathematician) main-belt(outer) 4 September 2017 (JD 2458000.5) 0 98.53 yr (35,989 days) 3.3831 AU 2.9966 AU 3.1899 AU 0.0606 5.70 yr (2,081 days) 196.29° 0.1730 ms / day 9.1784° 42.988° 301.53° 64.691 0.254 km68.169 1.767 km70.56 km (derived)70.75 2.5 km73.40 0.86 km74.46 16.37 km80.20 28.15 km84.67 0.64 km 93.73 0.03 h (51.0°, 76.0°) (λ1/β1) (275.0°, 58.0°) (λ2/β2) 0.030 0.0040.03 0.010.03 0.040.0426 (derived)0.052 0.0010.0559 0.0040.0602 0.0136 SMASS XPC 9.509.809.9010.03 0.3810.07 1424 Sundmania (prov. designation: 1937 AJ) is a large asteroid and rather slow rotator from the background population of the outer regions of the asteroid belt. It was discovered on 9 January 1937, by astronomer Yrjö Väisälä at the Turku Observatory in southwest Finland. The dark X-type asteroid has a notably long rotation period of 93.7 hours and measures approximately 70 km mi off 2 us in diameter. It was named after Finnish astronomer and mathematician Karl F. Sundman. Orbit and classification Sundmania is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It orbits the Sun in the outer main-belt at a distance of 3.0–3.4 AU once every 5 years and 8 months (2,081 days). Its orbit has an eccentricity of 0.06 and an inclination of 9° with respect to the ecliptic. The body's observation arc begins with its first identification as A918 WA at Heidelberg Observatory in November 1918, more than 18 years prior to its official discovery observation at Turku. Naming This minor planet was named after Finnish mathematician Karl F. Sundman (1873–1949), who intensively worked on the n-body problem. Sundman worked as an astronomer at several observatories all over Europe. He became director of the Helsinki University Observatory and was appointed professor of astronomy at the University of Helsinki in 1907. The asteroids 1558 Järnefelt and 1559 Kustaanheimo were also named after astronomers from the University of Helsinki. The 1424 naming was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 129). The lunar crater Sundman was also named in his honor. Physical characteristics In the SMASS classification, Sundmania is an X-type asteroid. It has also been characterized as a primitive P-type by the Wide-field Infrared Survey Explorer (WISE). The Lightcurve Data Base assumes it to be a carbonaceous C-type asteroid. Rotation period Sundmania is a rather slow rotator as most minor planets have a rotation period of less than 20 hours. In April 2012, a rotational lightcurve of Sundmania was obtained from photometric observations by American astronomer Robert Stephens at the Goat Mountain Astronomical Research Station G79 in California. Lightcurve analysis gave a rotation period of 93.73 hours with a brightness amplitude of 0.42 magnitude (U=2+). Observations by French amateur astronomers Laurent Bernasconi and René Roy gave a period of 36 and 47 hours, of which the latter seems to be half the period solution obtained by Stephens (U=1/1+). Spin axis In 2016, an international study modeled a lightcurve with a period of 94.537 0.005 hours and found two spin axes of (51.0°, 76.0°) and (275.0°, 58.0°) 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, Sundmania measures between 64.691 and 84.67 kilometers in diameter and its surface has an albedo between 0.030 and 0.0602. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0426 and a diameter of 70.56 kilometers based on an absolute magnitude of 9.8. References 30em 2017-06-04 last obs. JPL Small-Body Database Browser: 1424 Sundmania (1937 AJ) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001424 Jet Propulsion Laboratory 20 September 2017 Dictionary of Minor Planet Names Schmadel Lutz D. Springer Berlin Heidelberg (1424) Sundmania 114 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1425 Observatory museum Biographies: 1900s — Sundman, Karl Frithiof (1873–1949) University of Helsinky Hannu Karttunen http://www.astro.helsinki.fi/museo/1900s.shtml dead https://web.archive.org/web/20110616061231/http://www.astro.helsinki.fi/museo/1900s.shtml 16 June 2011 1424 Sundmania (1937 AJ) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1424 20 September 2017 Asteroids and comets rotation curves – (1424) Sundmania Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001424 20 September 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001424 dead 6 Joseph R. Masiero T. Grav A. K. Mainzer C. R. Nugent J. M. Bauer R. Stevenson S. 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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. 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Piron M. Polinska M. Polotto R. Poncy J. P. Previt F. Reignier D. Renauld D. Ricci F. Richard C. Rinner V. Risoldi D. Robilliard D. Romeuf G. Rousseau R. Roy J. Ruthroff P. A. Salom L. Salvador S. Sanchez T. Santana-Ros A. Scholz G. Séné B. Skiff K. Sobkowiak P. Sogorb F. Soldán A. Spiridakis E. Splanska S. Sposetti D. Starkey R. Stephens A. Stiepen R. Stoss J. Strajnic J.-P. Teng G. Tumolo A. Vagnozzi B. Vanoutryve J. M. Vugnon B. D. Warner M. Waucomont O. Wertz M. Winiarski M. Wolf February 2016 New and updated convex shape models of asteroids based on optical data from a large collaboration network Astronomy and Astrophysics 586 24 2016A&A...586A.108H 10.1051/0004-6361/201527441 1510.07422 119112278 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 53493339 20 September 2017 External links Lightcurve Database Query (LCDB), at www.minorplanet.info 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 – Geneva Observatory, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1424 1423 Jose 1424 1425 Tuorla 001424 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 001424 19370109