1391 Carelia

Main-belt asteroid October 2019 yes 1391 Carelia #D6D6D6 001391-asteroid shape model (1391) Carelia.png Modelled shape of Carelia from its lightcurve Y. Väisälä Turku Obs. 16 February 1936 (1391) Carelia 1936 DA1949 MR k @ ' r iː l i @Karelian, Carelian Karelia(European region) main-belt(middle) background 31 May 2020 (JD 2459000.5) 0 83.97 yr (30,670 d) 2.9677 AU 2.1278 AU 2.5478 AU 0.1648 4.07 yr (1,485 d) 228.13° 0.2424 ms / day 7.5962° 103.33° 85.875° 11.079 0.111 km 5.87822 0.00001 h (21.0°, −79.0°) (λ1/β1) (208.0°, −43.0°) (λ2/β2) 0.214 0.021 Tholen S S (SDSS-MOC) B–V 0.897 0.026 U–B 0.433 0.024 11.8 1391 Carelia (prov. designation: 1936 DA) is a stony background asteroid from the central region of the asteroid belt. It was discovered on 16 February 1936, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. The S-type asteroid has a rotation period of 5.9 hours and measures approximately 11 km mi off 2 us in diameter. It was named for the Northeast European region of Karelia. Orbit and classification Carelia 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 central main-belt at a distance of 2.1–3.0 AU once every 4 years and 1 month (1,485 days; semi-major axis of 2.55 AU). Its orbit has an eccentricity of 0.16 and an inclination of 8° with respect to the ecliptic. It was first observed at Heidelberg Observatory, extending the body's observation arc by 2 days prior to its official discovery observation at Turku. Naming This minor planet was named after the northeastern European region of Karelia, located between the Gulf of Finland and the Russian White Sea. The 1391 naming was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 126). Since the Winter War between the Soviet Union and Finland in 1939–40, most of the regions belongs now to Russia. A large part of Yrjö Väisälä's discoveries have names that are in some form or another related to that war about Karelia. Physical characteristics In the Tholen taxonomy, Carelia is a stony S-type asteroid, the most common type in the inner main-belt. The asteroid is also an S-type in the SDSS-based taxonomy. Rotation and pole In 2016, a rotational lightcurve of Carelia was published using modeled photometric data from the Lowell Photometric Database (LPD). Lightcurve analysis gave a rotation period of 5.87822 0.00001 hours (U=n.a.), as well as two spin axes at (21.0°, −79.0°) and (208.0°, −43.0°) in ecliptic coordinates (λ, β). Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Carelia measures 11.079 and 11.570 kilometers in diameter and its surface has an albedo of 0.1972 and 0.214, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 11.46 kilometers based on an absolute magnitude of 12.07. References 30em 2020-02-03 last obs. JPL Small-Body Database Browser: 1391 Carelia (1936 DA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001391 Jet Propulsion Laboratory 16 March 2020 Dictionary of Minor Planet Names Schmadel Lutz D. Springer Berlin Heidelberg (1391) Carelia 112 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1392 1391 Carelia (1936 DA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1391 3 April 2017 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 1391 3 April 2017 J. Durech J. Hanus D. Oszkiewicz R. Vanco March 2016 Asteroid models from the Lowell photometric database http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016A&A...587A..48D Astronomy and Astrophysics 587 6 2016A&A...587A..48D 10.1051/0004-6361/201527573 1601.02909 3 April 2017 Asteroid 1391 Carelia Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1391+Carelia 16 March 2020 https://web.archive.org/web/20200820013726/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1391+Carelia 20 August 2020 dead Asteroid 1391 Carelia – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1391 16 March 2020 J. M. Carvano P. H. Hasselmann D. Lazzaro T. Mothé-Diniz February 2010 SDSS-based taxonomic classification and orbital distribution of main belt asteroids https://sbnarchive.psi.edu/pds3/non_mission/EAR_A_I0035_5_SDSSTAX_V1_1/data/sdsstax_ast_table.tab Astronomy and Astrophysics 510 12 2010A&A...510A..43C 10.1051/0004-6361/200913322 16 March 2020 free (PDS data set) 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 1391 1390 Abastumani 1391 1392 Pierre 001391 Category:Discoveries by Yrjö Väisälä Category:Named minor planets 001391 19360216