1567 Alikoski

Main-belt asteroid October 2019 yes 1567 Alikoski #D6D6D6 22 April 1941 Y. Väisälä Turku Obs. (1567) Alikoski 1941 HN1947 HE1947 HG1948 OC Heikki Alikoski (astronomer) main-belt(outer) 4 September 2017 (JD 2458000.5) 0 78.55 yr (28,691 days) 3.4785 AU 2.9417 AU 3.2101 AU 0.0836 5.75 yr (2,101 days) 135.05° 0.1714 ms / day 17.279° 51.454° 110.87° 62.36 17.29 km67.83 2.1 km (IRAS:12)67.933 0.584 km69.242 0.432 km70.06 0.80 km77.10 19.58 km 16.405 0.01 h 0.04 0.030.05 0.040.059 0.0020.0624 0.01600.0626 0.004 (IRAS:12) PU (Tholen)C (SMASS)CB–V = 0.720 9.47 1567 Alikoski (provisional designation 1941 HN) is a rare-type carbonaceous asteroid from the outer region of the asteroid belt, approximately 67 kilometers in diameter. It was discovered on 22 April 1941, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. It was later named after Finnish astronomer Heikki Alikoski. Classification and orbit This asteroid orbits the Sun in the outer main-belt at a distance of 2.9–3.5 AU once every 5 years and 9 months (2,101 days). Its orbit has an eccentricity of 0.08 and an inclination of 17° with respect to the ecliptic. Alikoski's observation arc begins with a precovery taken at Turku in 1938, extending it by 3 years prior to the asteroid's official discovery observation. Physical characteristics Spectral type Alikoski is characterized as both a carbonaceous C-type asteroid and as a rare PU-type in the SMASS and Tholen taxonomic scheme, respectively. Rotation period In March 2004, a rotational lightcurve of Alikoski was obtained by American amateur astronomer Robert Stephens at Santana Observatory in California. Lightcurve analysis gave a well-defined rotation period of 16.405 hours with a brightness variation of 0.16 magnitude (U=3). Diameter and albedo According to the space-based surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Alikoski measures between 62.36 and 77.10 kilometers in diameter, and its surface has a low albedo between 0.04 and 0.062. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0626 and a diameter of 67.83 kilometers based on an absolute magnitude of 9.47. Naming This minor planet was named in honor of Finnish astronomer Heikki Alikoski (1912–1997), assistant to the discoverer from 1937 to 1956, and an observer and discoverer of minor planets himself. He also helped greatly in establishing the Turku Astronomical-Optical Institute. The official 1567 naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3930). References 2017-05-04 last obs. JPL Small-Body Database Browser: 1567 Alikoski (1941 HN) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001567 https://web.archive.org/web/20200918045625/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001567 dead 18 September 2020 Jet Propulsion Laboratory 5 June 2017 Dictionary of Minor Planet Names – (1567) Alikoski Schmadel Lutz D. Springer Berlin Heidelberg 124 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1568 (1567) Alikoski 1567 Alikoski (1941 HN) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1567 30 December 2016 Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008) Appendix – Publication Dates of the MPCs Schmadel Lutz D. 2009 Springer Berlin Heidelberg 221 978-3-642-01964-7 10.1007/978-3-642-01965-4 2009dmpn.book.....S 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 119293330 30 December 2016 1567 30 December 2016 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 – IRAS-A-FPA-3-RDR-IMPS-V6.0 2004PDSS...12.....T 17 October 2019 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 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 35447010 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 30 December 2016 6 C. R. Nugent A. Mainzer J. Bauer R. M. Cutri E. A. Kramer T. Grav J. Masiero S. Sonnett E. L. 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 Stephens, Robert D. September 2004 Photometry of 966 Muschi, 1567 Alikoski, and 2331 Parvulesco http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2004MPBu...31...60S The Minor Planet Bulletin 31 3 60–61 1052-8091 2004MPBu...31...60S 30 December 2016 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/20241208174218/http://obswww.unige.ch/~behrend/page_cou.html 8 December 2024 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1567 1566 Icarus 1567 1568 Aisleen 001567 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 001567 001567 19410422