1157 Arabia

Main-belt asteroid October 2019 yes 1157 Arabia #D6D6D6 K. Reinmuth Heidelberg Obs. 31 August 1929 (1157) Arabia 1929 QC1955 EC Arabian Peninsula main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 87.58 yr (31,987 days) 3.6412 AU 2.7221 AU 3.1816 AU 0.1444 5.68 yr (2,073 days) 195.98° 0.1737 ms / day 9.5447° 336.19° 313.37° 29.01 0.84 km29.113 4.433 km55.67 km (calculated) 15.225 0.005 hCaspari-2008 0.057 (assumed)0.211 0.0130.247 0.242 C (assumed) 9.829.89 0.2210.00 1157 Arabia, provisional designation 1929 QC, is an asteroid from the outer regions of the asteroid belt, approximately 29 kilometers in diameter. Astronomer Karl Reinmuth discovered it at the Heidelberg Observatory in southwest Germany on 31 August 1929. The asteroid was named for the Arabian Peninsula. Orbit and classification Arabia is a non-family asteroid from the main belt's background population. It orbits the Sun in the outer asteroid belt at a distance of 2.7–3.6 AU once every 5 years and 8 months (2,073 days). Its orbit has an eccentricity of 0.14 and an inclination of 10° with respect to the ecliptic. The body's observation arc begins at Heidelberg in December 1930, more than a year after its official discovery observation. Physical characteristics Arabia is an assumed carbonaceous C-type asteroid, while the measured albedos are rather typical for a stony composition (see below). Rotation period In June 2008, Peter Caspari obtained a rotational lightcurve of Arabia from photometric observations at the BDI Observatory (E18) near Sydney, Australia. Lightcurve analysis gave a rotation period of 15.225 hours with a brightness amplitude of 0.37 magnitude (U=3-).Caspari-2008 Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Arabia measures 29.01 and 29.113 kilometers in diameter and its surface has an albedo of 0.211 and 0.247, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a much larger diameter of 55.67 kilometers based on an absolute magnitude of 10.0. Naming This minor planet was named after the Arabian Peninsula, also known as "Arabia", in Western Asia. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 108). Notes Caspari-2008 Peter Caspari (2008) Minor Planet Lightcurve Analysis of 1157 Arabia and 1836 Komarov. Summary figures for (1157) Arabia at the LCDB References 30em 2017-03-29 last obs. JPL Small-Body Database Browser: 1157 Arabia (1929 QC) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001157 Jet Propulsion Laboratory 27 September 2017 Dictionary of Minor Planet Names – (1157) Arabia Schmadel Lutz D. Springer Berlin Heidelberg 98 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1158 (1157) Arabia 1157 Arabia (1929 QC) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1157 27 September 2017 Asteroid 1157 Arabia – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1157 28 October 2019 1157 27 September 2017 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 27 September 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 27 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 1157 1156 Kira 1157 1158 Luda 001157 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19290831