1155 Aënna

Main-belt asteroid October 2019 yes 1155 Aënna #D6D6D6 26 January 1928 K. Reinmuth Heidelberg Obs. (1155) Aenna 1928 BD1928 FU1941 UZ1982 DR 6 Astronomische Nachrichten(Astronomy journal) main-belt(inner) 4 September 2017 (JD 2458000.5) 0 89.44 yr (32,668 days) 2.8697 AU 2.0586 AU 2.4641 AU 0.1646 3.87 yr (1,413 days) 351.13° 0.2548 ms / day 6.5935° 39.122° 195.38° 9.284 0.524 km11.36 km (derived)11.70 0.75 km14.093 0.105 km 8.07 0.04 h 0.2169 (derived)0.2252 0.02120.329 0.0450.356 0.040 SMASS = XeX 11.511.9012.012.41 0.79 1155 Aënna, provisional designation 1928 BD, is an asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 26 January 1928, by German astronomer Karl Reinmuth at Heidelberg Observatory in southwest Germany. It is named for the astronomy journal Astronomische Nachrichten. Orbit and classification In the SMASS taxonomy, the X-type asteroid is classified as a Xe-type, an intermediary that transitions to the bright E-type asteroids. The spectra of a Xe-type contains an absorption feature near 0.49 μm, which is thought to be related with the presence of the iron sulfide mineral troilite, typically found in lunar and Martian meteorites. Aënna orbits the Sun in the inner main-belt at a distance of 2.1–2.9 AU once every 3 years and 10 months (1,413 days). Its orbit has an eccentricity of 0.16 and an inclination of 7° with respect to the ecliptic. The body's observation arc begins at Heidelberg with its official discovery observation in 1928. Physical characteristics Rotation period French amateur astronomer René Roy obtained a rotational lightcurve of Aënna from photometric observations taken in December 2015. Lightcurve analysis gave a rotation period of 8.07 hours with a brightness variation of 0.28 magnitude (U=2+). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Aënna measures between 9.28 and 14.09 kilometers in diameter, and its surface has an albedo between 0.225 and 0.356. The Collaborative Asteroid Lightcurve Link agrees best with Akari, and derives an albedo of 0.2169 with a diameter of 11.36 kilometers and an absolute magnitude of 12.0. Naming This minor planet was named after Astronomische Nachrichten, one of the first international journals in the field of astronomy. The constructed name "Aënna" contains the German pronunciation of the initials "A" and "N" followed by the mandatory feminine ending used for asteroids. The naming was proposed by the Astronomisches Rechen-Institut and mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 108). References 30em 2017-07-05 last obs. JPL Small-Body Database Browser: 1155 Aenna (1928 BD) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001155 Jet Propulsion Laboratory 26 July 2017 Dictionary of Minor Planet Names – (1155) Aënna Schmadel Lutz D. Springer Berlin Heidelberg 97 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1156 (1155) Aënna 1155 Aënna (1928 BD) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1155 7 February 2017 Asteroids and comets rotation curves – (1155) Aënna Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001155 7 February 2017 3 December 2002 https://web.archive.org/web/20021203214643/http://obswww.unige.ch/~behrend/page3cou.html#001155 dead Schelte J. Bus Richard P. Binzel July 2002 Phase II of the Small Main-Belt Asteroid Spectroscopic Survey. A Feature-Based Taxonomy http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002Icar..158..146B Icarus 158 1 146–177 2002Icar..158..146B 10.1006/icar.2002.6856 7 February 2017 1155 7 February 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 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 7 February 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 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 7 February 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 1155 1154 Astronomia 1155 1156 Kira 001155 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001155 19280126