1530 Rantaseppä

Stony Florian asteroid from the inner regions of the asteroid belt yes 1530 Rantaseppä #D6D6D6 16 September 1938 Y. Väisälä Turku Obs. (1530) Rantaseppä 1938 SG Hilkka Rantaseppä-Helenius(Finnish astronomer) main-beltFlora 4 September 2017 (JD 2458000.5) 0 78.63 yr (28,720 days) 2.6962 AU 1.8005 AU 2.2483 AU 0.1992 3.37 yr (1,231 days) 139.43° 0.2924 ms / day 4.4184° 285.88° 84.678° 5.044 0.058 km5.195 0.054 km5.93 km (calculated) 3.5258 0.0005 hLCDB-Pravec-2016Pravec-Lightcurve-Plot 0.24 (assumed)0.3791 0.09410.400 0.028 S 13.113.3 1530 Rantaseppä (provisional designation 1938 SG) is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. Discovered by Yrjö Väisälä at Turku Observatory in 1938, it was later named after Finnish astronomer Hilkka Rantaseppä-Helenius. Discovery Rantaseppä was discovered on 16 September 1938, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. Two night later, the body was independently discovered by Belgian astronomer Eugène Delporte at Uccle Observatory. The body's observation arc begins at Uccle, one day after its official discovery observation at Turku. Classification and orbit Rantaseppä is a member of the Flora family of stony asteroids, one of the largest families of the main belt. It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,231 days). Its orbit has an eccentricity of 0.20 and an inclination of 4° with respect to the ecliptic. Physical characteristics Lightcurve In December 2016, a rotational lightcurve of Rantaseppä was obtained from photometric observations by Czech astronomer Petr Pravec at the Ondřejov Observatory and its photometric program of near-Earth objects.Pravec-Lightcurve-Plot Lightcurve analysis gave a rotation period of 3.5258 hours with a relatively high brightness variation of 0.41 magnitude, which is indicative of a non-spheroidal shape (U=3).LCDB-Pravec-2016 Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Rantaseppä measures 5.044 and 5.195 kilometers in diameter and its surface has an albedo of 0.3791 and 0.400, respectively. The Collaborative Asteroid Lightcurve Link assumes an albedo for a stony S-type asteroid of 0.24 – derived from 8 Flora, the family's largest member and namesake – and calculates a diameter of 5.93 kilometers with an absolute magnitude of 13.3. Naming This minor planet was named in memory of Finnish astronomer Hilkka Rantaseppä-Helenius (1925–1975), an observer of comets and asteroids at the Turku Astronomical-Optical Institute of the University of Turku. The official 1530 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3929). Notes LCDB-Pravec-2016 Pravec (2016) web: rotation period 3.5258 0.0005 hours with a brightness amplitude of 0.41 magnitude and an Quality Code of 3. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) and Pravec, P.; Wolf, M.; Sarounova, L. (2016) Pravec-Lightcurve-Plot Lightcurve plot obtained by Petr Pravec from prepublished periods of asteroids of the Ondrejov NEO Photometric Program, see summary file References 30em 2017-05-04 last obs. JPL Small-Body Database Browser: 1530 Rantaseppa (1938 SG) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001530 Jet Propulsion Laboratory 30 June 2017 Dictionary of Minor Planet Names – (1530) Rantaseppä Schmadel Lutz D. Springer Berlin Heidelberg 121 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1531 (1530) Rantaseppä 1530 Rantaseppa (1938 SG) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1530 3 April 2017 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 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 3 April 2017 1530 3 April 2017 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 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 2017-12-16 ) 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 2016-07-29 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1530 1530 1529 Oterma 1530 1531 Hartmut 001530 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 19380916