1453 Fennia

Hungaria asteroid and synchronous binary system October 2019 yes 1453 Fennia #D6D6D6 Y. Väisälä Turku Obs. 8 March 1938 (1453) Fennia 1938 ED 1 ' f E n i @ Finland (Scandinavian country) main-belt(inner)Hungariabackground 4 September 2017 (JD 2458000.5) 0 79.50 yr (29,037 days) 1.9502 AU 1.8438 AU 1.8970 AU 0.0281 2.61 yr (954 days) 72.856° 0.3772 ms / day 23.675° 7.0898° 254.79° 1 (D: 1.95 km; P: 23.55 h) 6.36 0.68 km6.573 0.245 km6.96 0.39 km (derived)7.23 0.4 km7.32 km8.98 0.28 km 4.412 0.002 hlightcurveplot-Warner-B4.4121 0.0001 hlightcurveplot-Warner-A4.41224 0.0004 h4.4124 0.0004 h4.413 0.002 h6 1 h12.23 0.04 h (wrong) 0.140 0.0290.186 0.0130.244 0.0310.2494 0.0320.409 0.0400.50 0.16 Tholen SKB–V 0.928B–V 0.890 0.030U–B 0.532V–R 0.500 0.020V–I 0.980 0.020 12.38 0.05 (R)12.5012.6912.81 0.0612.82 0.2412.8312.83 0.0712.83512.835 0.06 1453 Fennia, provisional designation 1938 ED 1, is a stony Hungaria asteroid and synchronous binary system from the innermost regions of the asteroid belt, approximately 7 kilometers in diameter. Discovered by Yrjö Väisälä at the Turku Observatory in 1938, the asteroid was later named after the Nordic country of Finland. The system's minor-planet moon was discovered in 2007. It has a derived diameter of 1.95 kilometers and is orbiting its primary every 23.55 hours. Discovery Fennia was discovered on 8 March 1938, by Finnish astronomer Yrjö Väisälä at the Iso-Heikkilä Observatory in Turku, southwest Finland. Fifteen days later, it was independently discovered by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula, which also served as a confirmation of the first observation. The Minor Planet Center only recognizes the first discoverer. Orbit and classification Fennia is a bright member of the Hungaria asteroids, a dynamical group that forms the innermost dense concentration of asteroids in the Solar System. The group includes all members of large asteroid family of the same name (003). When applying the Hierarchical Clustering Method to its proper orbital elements, Fennia is a non-family asteroid of the main belt's background population. It orbits the Sun in the inner main-belt at a distance of 1.8–2.0 AU once every 2 years and 7 months (954 days). Its orbit has an eccentricity of 0.03 and an inclination of 24° with respect to the ecliptic. The body's observation arc begins at the discovering observatory (or at Simeiz Observatory), 15 days after its official discovery observation at Turku. Physical characteristics In the Tholen classification, Fennia is a common, stony S-type asteroid. It has also been characterized as a rare K-type asteroid. Rotation period Since 1991, a large number of rotational lightcurves of Fennia have been obtained from photometric observations. Lightcurve analysis gave a consolidated rotation period of 4.4121 hours with a brightness amplitude between 0.10 and 0.20 magnitude (U=0/3/3/3/3/3-).lightcurveplot-Warner-Alightcurveplot-Warner-B Due to its relatively low brightness amplitude, Fennia is likely spheroidal in shape. Moon In 2007, these photometric lightcurve observations revealed that Fennia is a synchronous binary asteroid, orbited by a minor-planet moon. The moon has an orbital period of 22.99 hours,lightcurveplot-Warner-A later revised to 23.55 hours.lightcurveplot-Warner-B It is at least a quarter the size of Fennia itself – a secondary-to-primary mean-diameter ratio of 0.28 0.02) – which translates into a diameter of 1.95 0.18 kilometers based on current estimates. 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 Wide-field Infrared Survey Explorer, Fennia measures between 6.36 and 8.98 kilometers in diameter and its surface has an albedo between 0.140 and 0.50. The Johnston's archive derives a diameter of 6.96 kilometers, while Collaborative Asteroid Lightcurve Link adopts an albedo of 0.244 and a diameter of 7.32 kilometers using an absolute magnitude of 12.835, taken from the revised WISE-results. Naming This minor planet was named in honor of the Nordic country of Finland. "Fennia" is the Latin word for Finland. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 130). Notes lightcurveplot-Warner-A Lightcurve plot of 1453 Fennia, Palmer Divide Observatory, Colorado, Brian D. Warner (2007) rotation period 4.4121 0.0001 hours with a brightness amplitude of 0.10 0.01 mag, including primary–secondary mutual eclipsing/occultation event chart with an orbital period of 22.99 0.05. Summary figures at LCDB lightcurveplot-Warner-B Lightcurve plot of 1453 Fennia, Palmer Divide Station, California, Brian D. Warner (2016). rotation period 4.412 0.002 hours with a brightness amplitude of 0.19 mag, and P2-chart with an orbital period of 23.55 0.05 hours. Summary figures at LCDB References 30em 2017-10-01 last obs. JPL Small-Body Database Browser: 1453 Fennia (1938 ED1) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001453 Jet Propulsion Laboratory 21 October 2017 Dictionary of Minor Planet Names – (1453) Fennia Schmadel Lutz D. Springer Berlin Heidelberg 116 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1454 (1453) Fennia 1453 Fennia (1938 ED1) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1453 21 October 2017 Asteroids and comets rotation curves – (1453) Fennia Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001453 21 October 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001453 dead Asteroid 1453 Fennia – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1453 29 October 2019 Asteroids with Satellites Database – Johnston's Archive: (1453) Fennia Johnston's Archive 21 September 2014 http://www.johnstonsarchive.net/astro/astmoons/am-01453.html 21 October 2017 Electronic Telegram No. 1150: (1453) Fennia Central Bureau for Astronomical Telegrams 1 December 2007 http://www.cbat.eps.harvard.edu/cbet/001100/CBET001150.txt 21 October 2017 1453 21 October 2017 6 Brian D. Warner Alan W. Harris Petr Pravec Robert D. Stephens Donald P. Pray Walter R. Jr. Cooney John Gross Dirk Terrell S. Gajdos A. Galad Yurij Krugly June 2008 1453 Fennia: A Hungaria Binary The Minor Planet Bulletin 35 2 73–74 1052-8091 2008MPBu...35...73W 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 The Astrophysical Journal Letters 759 1 5 2012ApJ...759L...8M 10.1088/2041-8205/759/1/L8 1209.5794 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 The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 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) 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 W. Z. Wisniewski T. M. Michalowski A. W. Harris R. S. McMillan March 1995 Photoelectric Observations of 125 Asteroids Abstracts of the Lunar and Planetary Science Conference 26 1511 1995LPI....26.1511W 6 B. D. Warner A. W. Harris P. Pravec R. D. Stephens D. Pray W. Cooney J. Gross D. Terrell S. Gajdos A. Galad Yu. Krugly December 2007 (1453) Fennia Central Bureau Electronic Telegrams 1150 1 2007CBET.1150....1W David Higgins Julian Oey Petr Pravec January 2011 Period Determination of Binary Asteroid Targets Observed at Hunters Hill Observatory: May-September 2009 The Minor Planet Bulletin 38 1 46–49 1052-8091 2011MPBu...38...46H 6 P. Pravec P. Scheirich D. Vokrouhlický A. W. Harris P. Kusnirák K. Hornoch D. P. Pray D. Higgins A. Galád J. Világi S. Gajdos L. Kornos J. Oey M. Husárik W. R. Cooney J. Gross D. Terrell R. Durkee J. Pollock D. E. Reichart K. Ivarsen J. Haislip A. LaCluyze Yu. N. Krugly N. Gaftonyuk R. D. Stephens R. Dyvig V. Reddy V. Chiorny O. Vaduvescu Longa-Peñ P. a A. Tudorica B. D. Warner G. Masi J. Brinsfield Gonç R. alves P. Brown Z. Krzeminski O. Gerashchenko V. Shevchenko I. Molotov F. Marchis March 2012 Binary asteroid population. 2. 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Faggi March 2017 Refining the asteroid taxonomy by polarimetric observations Icarus 284 30–42 2017Icar..284...30B 10.1016/j.icarus.2016.11.003 11336/63617 free External links Asteroids with Satellites, Robert Johnston, johnstonsarchive.net 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 1453 1452 Hunnia 1453 1454 Kalevala 001453 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 001453 001453 19380308