1151 Ithaka

Carbonaceous asteroid from the inner regions of the asteroid belt October 2019 yes 1151 Ithaka #D6D6D6 K. Reinmuth Heidelberg Obs. 8 September 1929 (1151) Ithaka 1929 RK1966 LA Ithaca (Greek Ionian Island) main-belt(inner) 4 September 2017 (JD 2458000.5) 0 87.63 yr (32,007 days) 3.0719 AU 1.7417 AU 2.4068 AU 0.2763 3.73 yr (1,364 days) 212.71° 0.2640 ms / day 6.5616° 225.42° 122.36° 0.7459 AU290.6 LD 8.97 2.41 km12.120 0.100 km14 3 km14.37 km (derived)20.46 4.51 km 4.93115 0.00011 h4.9314 0.0003 hlcdb-Pravec-20114.932 0.001 h 0.02 0.020.057 (assumed)0.069 0.0030.0692 0.00330.13 0.10 C 12.90 0.5612.9412.94 0.0313.1013.1213.2 1151 Ithaka, provisional designation 1929 RK, is a carbonaceous asteroid from the inner regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered by Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in 1929, and later named for the Greek island of Ithaca. Discovery Ithaka was discovered on 8 September 1929, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. Five nights later, it was independently discovered by Soviet astronomer Grigory Neujmin at Simeiz Observatory on the Crimean peninsula. Only the first discoverer is acknowledged by the Minor Planet Center. The body's observation arc begins with its official discovery observation at Heidelberg. Orbit and classification Ithaka is a non-family asteroid from the background population. It orbits the Sun in the inner main-belt at a distance of 1.7–3.1 AU once every 3 years and 9 months (1,364 days). Its orbit has an eccentricity of 0.28 and an inclination of 7° with respect to the ecliptic. Physical characteristics Ithaka is an assumed carbonaceous C-type asteroid, untypical for inner-belt asteroids. Rotation period In 2011, three rotational lightcurves of Ithaka were obtained from photometric observations. Lightcurve analysis gave a well-defined rotation period between 4.93115 and 4.932 hours with a brightness amplitude of 0.12 to 0.15 magnitude (U=3/3/3).lcdb-Pravec-2011 Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Ithaka measures between 8.97 and 20.46 kilometers in diameter and its surface has an albedo between 0.02 and 0.13. A collaboration of Italian and American photometrists estimate a diameter of 14 3 kilometers, and the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and derives a diameter of 14.37 kilometers based on an absolute magnitude of 12.94. Naming This minor planet was named after the Greek Ionian Island of Ithaca located in the Ionian Sea. In Greek mythology, the legendary hero Odysseus was the King of Ithaca (also see 1143 Odysseus). The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 107). Notes lcdb-Pravec-2011 Pravec (2011), lightcurve plot of (1151) Ithaka. Observation: 14 September 2011. Rotation period 4.9314 0.0003 hours with a brightness amplitude of 0.12 0.01 mag. Quality Code of 3. Summary figures at Ondrejov Asteroid Photometry Project and LCDB References 30em 2017-04-26 last obs. JPL Small-Body Database Browser: 1151 Ithaka (1929 RK) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001151 Jet Propulsion Laboratory 8 September 2017 Dictionary of Minor Planet Names – (1151) Ithaka Schmadel Lutz D. Springer Berlin Heidelberg 97 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1152 (1151) Ithaka 1151 Ithaka (1929 RK) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1151 8 September 2017 6 Joseph R. Masiero A. K. Mainzer T. Grav J. M. Bauer R. M. Cutri J. Dailey P. R. M. Eisenhardt R. S. McMillan T. B. Spahr M. F. Skrutskie D. Tholen R. G. Walker E. L. Wright E. DeBaun D. Elsbury T. IV Gautier S. Gomillion A. Wilkins November 2011 Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M The Astrophysical Journal 741 2 20 2011ApJ...741...68M 10.1088/0004-637X/741/2/68 1109.4096 118745497 8 September 2017 1151 8 September 2017 Lorenzo Franco Andrea Ferrero Russell I. Durkee April 2012 Lightcurve Photometry and H-G Parameters for 1151 Ithaka http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39...47F The Minor Planet Bulletin 39 2 47–48 1052-8091 2012MPBu...39...47F 8 September 2017 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 8 September 2017 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 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 Aymami, Josep Maria January 2012 CCD Photometry and Lightcurve Analysis of Main Belt Asteroids 1077 Campanula and 1151 Ithaka from Observatori Carmelita http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012MPBu...39...29A The Minor Planet Bulletin 39 1 29 1052-8091 2012MPBu...39...29A 8 September 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 8 September 2017 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/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 1151 1150 Achaia 1151 1152 Pawona 001151 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19290908