1139 Atami

Mars-crossing asteroid October 2019 yes 1139 Atami #FA8072 1 December 1929 O. OikawaK. Kubokawa Tokyo Astronomical Obs. (389) (1139) Atami 1929 XE ja atami lang Atami (Japanese city) Mars-crosser 4 September 2017 (JD 2458000.5) 0 87.50 yr (31,960 days) 2.4451 AU 1.4505 AU 1.9478 AU 0.2553 2.72 yr (993 days) 110.80° 0.3626 ms / day 13.087° 213.35° 206.62° 0.4722 AU184 LD 0.0298 AU 1 8.24 0.82 km9.35 km (calculated) 15 h20 h24 h27.43 0.0527.446 0.001 h27.45 0.01 h27.45 0.05 h27.472 0.002 h27.56 0.01 hlightcurve-plot-Antelope-Hills 0.20 (assumed)0.258 0.052 S (Tholen)S (SMASS)SB–V = 0.920U–B = 0.497 12.5112.59 0.3712.86 0.02 1139 Atami, provisional designation 1929 XE, is a stony asteroid and sizable Mars-crosser, as well as a synchronous binary system near the innermost region of the asteroid belt, approximately 9 kilometers in diameter. It was discovered on 1 December 1929, by Japanese astronomers Okuro Oikawa and Kazuo Kubokawa at the Tokyo Astronomical Observatory (389) near Tokyo. It was named after the Japanese city of Atami. It has the lowest Minimum orbit intersection distance (MOID) to Mars of any asteroid as large as it, its orbit intersecting only 0.03 astronomical units from the planet. Classification and orbit Atami is a Mars-crossing asteroid, a dynamically unstable group between the main belt and the near-Earth populations, crossing the orbit of Mars at 1.666 AU. It orbits the Sun at a distance of 1.5–2.4 AU once every 2 years and 9 months (993 days). Its orbit has an eccentricity of 0.26 and an inclination of 13° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Tokyo in 1929. Physical characteristics Spectral type Atami is a common stony S-type asteroid in both the Tholen and SMASS classification. It has also been characterized as a S-type by Pan-STARRS photometric survey. Binary system In 2005, two rotational lightcurves obtained at the U.S. Antelope Hills Observatory in New Mexico and by a collaboration of several European astronomers gave a rotation period of 27.56 0.01 and 27.446 0.001 hours with a brightness variation of 0.45 and 0.40 in magnitude, respectively (U=3/3).lightcurve-plot-Antelope-Hills Photometric and Arecibo echo spectra observations in 2005 confirmed a 5 kilometer satellite orbiting at least 15 kilometers from its primary. Due to the similar size of the primary and secondary the Minor Planet Center lists this as a binary companion. Diameter and albedo According to the survey carried out by NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, Atami measures 8.24 kilometers in diameter and its surface has an albedo of 0.258, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 9.35 kilometers based on an absolute magnitude of 12.51. This makes Atami one of the largest mid-sized Mars-crossing asteroids comparable with 1065 Amundsenia (9.75 km), 1474 Beira (8.73 km), 1011 Laodamia (7.5 km), 1727 Mette (est. 9 km), 1131 Porzia (7.13 km), 1235 Schorria (est. 9 km), 985 Rosina (8.18 km), 1310 Villigera (15.24 km) and 1468 Zomba (7 km), but far smaller than the largest members of this dynamical group, namely, 132 Aethra, 323 Brucia, 1508 Kemi, 2204 Lyyli and 512 Taurinensis, which are all larger than 20 kilometers in diameter. Naming The minor planet was named after Atami, a Japanese city and harbor near Tokyo, Japan. The naming citation was first mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 106). Notes lightcurve-plot-Antelope-Hills Lightcurve plot of (1139) Atami, Robert Koff, Antelope Hills Observatory (H09). Summary figures at LCDB References 2017-06-02 last obs. JPL Small-Body Database Browser: 1139 Atami (1929 XE) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001139 Jet Propulsion Laboratory 20 October 2017 Dictionary of Minor Planet Names – (1139) Atami Schmadel Lutz D. Springer Berlin Heidelberg 96 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1140 (1139) Atami 1139 Atami (1929 XE) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1139 20 October 2017 Asteroids and comets rotation curves – (1139) Atami Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001139 7 February 2017 3 December 2002 https://web.archive.org/web/20021203214643/http://obswww.unige.ch/~behrend/page3cou.html#001139 dead 1139 7 February 2017 2006-03-14 Electronic Telegram No. 430 IAU Central Bureau for Astronomical Telegrams http://www.cbat.eps.harvard.edu/cbet/000400/CBET000430.txt 7 February 2017 2009-09-17 Satellites and Companions of Minor Planets IAU Central Bureau for Astronomical Telegrams http://www.cbat.eps.harvard.edu/minorsats.html 7 February 2017 D. F. Lupishko F. P. Velichko V. G. Shevchenko June 1988 Photometry of the AMOR type asteroids 1036 Ganymede and 1139 Atami http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1988AVest..22..167L Astronomicheskii Vestnik 22 167–173.InRussian 0320-930X 1988AVest..22..167L 22 August 2016 W. Z. Wisniewski T. M. Michalowski A. W. Harris R. S. McMillan March 1995 Photoelectric Observations of 125 Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1995LPI....26.1511W Abstracts of the Lunar and Planetary Science Conference 26 1511 1995LPI....26.1511W 22 August 2016 Koff, Robert A. June 2006 Lightcurves of asteroids 141 Lumen, 259 Alatheia, 363 Padua, 455 Bruchsalia 514 Armida, 524 Fidelio, and 1139 Atami http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2006MPBu...33...31K The Minor Planet Bulletin 33 2 31–33 1052-8091 2006MPBu...33...31K 22 August 2016 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 22 August 2016 V. Alí-Lagoa M. Delbo' July 2017 Sizes and albedos of Mars-crossing asteroids from WISE/NEOWISE data https://www.aanda.org/articles/aa/pdf/2017/07/aa29917-16.pdf Astronomy and Astrophysics 603 8 2017A&A...603A..55A 10.1051/0004-6361/201629917 1705.10263 20 October 2017 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 1139 1138 Attica 1139 1140 Crimea 001139 Category:Discoveries by Okuro Oikawa Category:Named minor planets 001139 001139 001139 19291201