1309 Hyperborea

Carbonaceous background asteroid October 2019 yes 1309 Hyperborea #D6D6D6 G. Neujmin Simeiz Obs. 11 October 1931 (1309) Hyperborea 1931 TO1934 GT1971 SG 11973 AW 4A919 RBA919 SH h aɪ p ər ˈ b ɔər iː əhyperborean Hyperborea(Greek mythology) main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 98.23 yr (35,880 days) 3.6888 AU 2.7251 AU 3.2069 AU 0.1503 5.74 yr (2,098 days) 292.38° 0.1716 ms / day 10.279° 206.08° 244.90° 55.14 14.34 km55.48 13.26 km57.11 km (derived)57.15 3.9 km57.570 0.349 km57.99 0.72 km61.605 1.019 km64.40 2.03 km 13.858 0.004 h13.87 0.00213.88 0.02 h13.95 0.02 h 0.03 0.020.032 0.0070.0387 0.00540.04 0.030.0411 (derived)0.043 0.0050.044 0.0010.0450 0.007 C 10.2010.3010.30 0.1110.4010.43 1309 Hyperborea h aɪ p ər ˈ b ɔər iː ə is a carbonaceous background asteroid from the outermost regions of the asteroid belt, approximately 57 kilometers in diameter. It was discovered on 11 October 1931, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula, and given the provisional designation 1931 TO. The asteroid was named after Hyperborea, the northern homeland of a Greek mythical race of giants. Orbit and classification Hyperborea is a non-family asteroid of the main belt's background population. It orbits the Sun in the outermost asteroid belt at a distance of 2.7–3.7 AU once every 5 years and 9 months (2,098 days; semi-major axis of 3.21 AU). Its orbit has an eccentricity of 0.15 and an inclination of 10° with respect to the ecliptic. The body's observation arc begins at Heidelberg Observatory with its first observations as A919 RB in September 1919, or 12 years prior to its official discovery observation at Simeiz. Physical characteristics Hyperborea has been characterized as a carbonaceous C-type asteroid by Pan-STARRS photometric survey. Rotation period Between 2002 and 2017, four rotational lightcurves of Hyperborea were obtained from photometric observations by astronomers Francisco Sold and Pierre Antonini, as well as by astronomers at the Oakley Southern Sky and Rozhen Observatory in Australia and Bulgaria, respectively (U=2+/n.a./3/2). The consolidated lightcurve gave a rotation period of 13.88 hours with a brightness amplitude between 0.34 and 0.41 magnitude. 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, Hyperborea measures between 55.14 and 64.40 kilometers in diameter and its surface has an albedo between 0.03 and 0.0450. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0411 and a diameter of 57.11 kilometers based on an absolute magnitude of 10.3. Naming This minor planet was named after Hyperborea, the homeland of the Hyperboreans, a Greek mythical race of giants associated with the cult of Apollo. Herodotus placed the region far to the north of Thrace beyond the North Wind. It was therefore believed to be a region of perpetual sunshine. Lutz Schmadel, the author of the Dictionary of Minor Planets, learned about the naming from Russian astronomer Nataliya Sergeevna Samoilova-Yakhontova (see 1653 1653 Yakhontovia). References 30em 2017-11-25 last obs. JPL Small-Body Database Browser: 1309 Hyperborea (1931 TO) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001309 Jet Propulsion Laboratory 15 December 2017 Dictionary of Minor Planet Names – (1309) Hyperborea Schmadel Lutz D. Springer Berlin Heidelberg 107 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1310 (1309) Hyperborea 1309 Hyperborea (1931 TO) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1309 15 December 2017 Asteroids and comets rotation curves – (1309) Hyperborea Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page4cou.html#001309 15 December 2017 3 August 2003 https://web.archive.org/web/20030803183423/http://obswww.unige.ch/~behrend/page4cou.html#001309 dead 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 The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 119293330 Asteroid 1309 Hyperborea – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1309 29 October 2019 1309 15 December 2017 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 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 46350317 15 December 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 35447010 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 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 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 9341381 15 December 2017 Gordana Apostolovska Violeta Ivanova Galin Borisov June 2004 Lightcurves and rotational periods of 1474 Beira, 1309 Hyperborea, and 2525 O'Steen http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2004MPBu...31...44A The Minor Planet Bulletin 31 2 44–45 1052-8091 2004MPBu...31...44A 15 December 2017 Robert Lemke Oliver Heath Shipley Richard Ditteon October 2008 Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2008 March http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008MPBu...35..149O The Minor Planet Bulletin 35 4 149–150 1052-8091 2008MPBu...35..149O 15 December 2017 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 53493339 15 December 2017 External links (1309) Hyperborea at AstDyS-2 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 1309 1308 Halleria 1309 1310 Villigera 001309 Category:Discoveries by Grigory Neujmin Category:Named minor planets 19311011 Category:Hyperborea