1947 Iso-Heikkilä

Carbonaceous main-belt asteroid October 2019 yes 1947 Iso-Heikkilä #D6D6D6 4 March 1935 Y. Väisälä Turku Obs. (1947) Iso-Heikkilä 1935 EA Iso-Heikkilä (location) main-belt(outer) Eos 4 September 2017 (JD 2458000.5) 0 81.94 yr (29,928 days) 3.2712 AU 3.0367 AU 3.1539 AU 0.0372 5.60 yr (2,046 days) 198.82° 0.1760 ms / day 11.912° 90.908° 144.06° 29.20 km (derived)30.72 0.86 km31.61 0.81 km 5.0158 h 0.049 0.0090.0571 (derived)0.091 0.006 DC 10.8011.411.5111.61 0.33 1947 Iso-Heikkilä, provisional designation 1935 EA, is a carbonaceous Eos asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 4 March 1935, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. It was named after the location of the discovering observatory, which is also known as the "Iso-Heikkilä Observatory". Orbit and classification Iso-Heikkilä is a member of the Eos family (606), the largest asteroid family in the outer main belt consisting of nearly 10,000 asteroids.23 It orbits the Sun in the outer main-belt at a distance of 3.0–3.3 AU once every 5 years and 7 months (2,046 days). Its orbit has an eccentricity of 0.04 and an inclination of 12° with respect to the ecliptic. As no precoveries were taken, and no prior identifications were made, the body's observation arc begins with its discovery observation. Physical characteristics The C-type asteroid has been characterized as a rare and reddish D-type asteroid by Pan-STARRS large-scale photometric survey. 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, Iso-Heikkilä measures 30.7 and 31.6 kilometers in diameter, and its surface has an albedo of 0.091 and 0.049, respectively. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0571 and a diameter of 29.2 kilometers with an absolute magnitude of 11.4. Rotation period In October 2005, a rotational lightcurve of Iso-Heikkilä was obtained from photometric observations by Slovak astronomer Adrián Galád. It gave a rotation period of 5.0158 hours with a brightness variation of 0.35 magnitude. However, the lightcurve is ambiguous and several alternative period solutions are possible (U=n.a.) Naming This minor planet was named for the farm, which is located in the Iso-Heikkilä district and owned by Turku University. It became the site of the Turku Observatory, which is also called Iso-Heikkilä Observatory (fi Iso-Heikkilän tähtitorni). It was the observatory's first minor planet discovery. The official naming citation was published by the Minor Planet Center on 1 August 1980 (M.P.C. 5450). References 30em 2017-02-08 last obs. JPL Small-Body Database Browser: 1947 Iso-Heikkila (1935 EA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001947 Jet Propulsion Laboratory 10 June 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 156 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1948 (1947) Iso-Heikkilä 1947 Iso-Heikkila (1935 EA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1947 9 December 2016 MPC/MPO/MPS Archive Minor Planet Center https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html 9 December 2016 Asteroid 1947 Iso-Heikkila – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1947+Iso-Heikkila#Asteroid%201947%20Iso-HeikkilaEAR-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 1947 9 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 free (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 9 December 2016 Galád, A. May 2010 Accuracy of calibrated data from the SDSS moving object catalog, absolute magnitudes, and probable lightcurves for several asteroids Astronomy and Astrophysics 514 10 2010A&A...514A..55G 10.1051/0004-6361/201014029 free 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 9 December 2016 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20110721225144/http://www.minorplanet.info/lightcurvedatabase.html 21 July 2011 ) 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 1947 1946 Walraven 1947 1948 Kampala 001947 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 19350304