1108 Demeter

Asteroid Demeter (disambiguation) March 2018 yes 1108 Demeter #D6D6D6 K. Reinmuth Heidelberg Obs. 31 May 1929 (1108) Demeter 1929 KA1963 MF d ᵻ ' m iː t ərDemeter Demeter (Greek mythology) main-belt(inner)Phocaeabackground 23 March 2018 (JD 2458200.5) 0 88.65 yr (32,378 d) 3.0510 AU 1.8040 AU 2.4275 AU 0.2568 3.78 yr (1,381 d) 139.57° 0.2606 ms / day 24.916° 234.25° 78.109° 25.285 0.057 km25.35 6.72 km25.61 2.0 km27.316 0.221 km27.333 5.042 km31.06 0.58 km31.33 0.45 km 9.70 0.01 h9.701 0.002 h9.846 0.008 h9.870 0.012 h 0.0229 0.02020.031 0.0050.032 0.0010.0408 0.00400.0464 0.0080.05 0.02 Tholen CXB–V 0.681U–B 0.308 11.9112.5112.51 0.38 1108 Demeter, provisional designation 1929 KA, is a dark asteroid from the inner regions of the asteroid belt, approximately 27 km mi off us in diameter. It was discovered on 31 May 1929, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory near Heidelberg, Germany. The asteroid was named after Demeter, the Greek goddess of fruitful soil and agriculture. It has a rotation period of 9.846 hours. Orbit and classification Demeter is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. Based on osculating Keplerian orbital elements, it has also been classified as a member of the Phocaea family (701), a large family of stony asteroids, different to Demeter spectral type (see below). It orbits the Sun in the inner main-belt at a distance of 1.8–3.1 AU once every 3 years and 9 months (1,381 days; semi-major axis of 2.43 AU). Its orbit has an eccentricity of 0.26 and an inclination of 25° with respect to the ecliptic. The asteroid was first observed at the Italian Observatory of Turin, three days prior to its official discovery observation at Heidelberg. The body's observation arc begins at Yerkes Observatory in December 1930. Physical characteristics In the Tholen classification, Demeter spectral type is ambiguous, closest to a carbonaceous C-type and somewhat similar to an X-type asteroid. Rotation period In June 2016, a rotational lightcurve of Demeter was obtained from photometric observations by American astronomers Tom Polakis and Brian Skiff at the Command Module Observatory V02 in Tempe, Arizona. Lightcurve analysis gave a rotation period of 9.846 hours with an amplitude of 0.12 magnitude (U=3). Observations by the Spanish OBAS group, also taken during the 2016-opposition, gave a concurring period of 9.870 hours and a brightness variation of 0.11 magnitude (U=3-). The results supersede previous observations by Robert Stephens, Olivier Thizy, René Roy and Stéphane Charbonnel from July 2001, which gave a period of 9.70 and 9.701 hours with an amplitude of 0.12 and 0.14 magnitude, respectively. 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, Demeter measures between 25.285 and 31.33 kilometers in diameter and its surface has a low albedo between 0.0229 and 0.05. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0464 and a diameter of 25.61 kilometers based on an absolute magnitude of 11.91. Naming This minor planet was named from Greek mythology after Demeter, the goddess of fruitful soil and agriculture. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 104). Conflict with Ceres Demeter is the Greek equivalent of the Roman goddess Ceres. When main-belt asteroid and dwarf planet 1 Ceres was named, the Greeks called it Demeter, effectively translating the name into Greek, rather than using the Latin Ceres or the original Italian Cerere. However, this created a problem when asteroid Demeter was named. The Greeks resolved this by using the classical form of the name, Δημήτηρ Dēmêtēr, for the new asteroid, distinguishing it from the Modern Greek form Δήμητρα Dêmētra that had been used for 1 Ceres. This conflict did not occur in Greek-influenced Slavic languages such as Russian, which had adopted Cerera (Церера) for 1 Ceres, and were thus free to use the modern Greek form Demetra for the asteroid Demeter. References 30em 2018-01-22 last obs. JPL Small-Body Database Browser: 1108 Demeter (1929 KA) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001108 Jet Propulsion Laboratory 8 March 2018 Dictionary of Minor Planet Names Schmadel Lutz D. Springer Berlin Heidelberg 94 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1109 (1108) Demeter 1108 Demeter (1929 KA) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1108 8 March 2018 Asteroids and comets rotation curves – (1108) Demeter Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001108 8 March 2018 3 December 2002 https://web.archive.org/web/20021203214643/http://obswww.unige.ch/~behrend/page3cou.html#001108 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 1108 Demeter – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1108 28 October 2019 1108 8 March 2018 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 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 8 March 2018 6 Joseph R. Masiero C. Nugent A. K. Mainzer E. L. Wright J. M. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett October 2017 NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos The Astronomical Journal 154 4 10 2017AJ....154..168M 10.3847/1538-3881/aa89ec 1708.09504 250780308 free 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 free (online, AcuA catalog p. 153) 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 March 2018 Stephens, R. D. March 2002 Photometry of 866 Fatme, 894 Erda, 1108 Demeter, and 3443 Letsungdao http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002MPBu...29....2S The Minor Planet Bulletin 29 2–3 2002MPBu...29....2S 8 March 2018 Tom Polakis Brian A. Skiff October 2016 Lightcurve Analysis for Asteroids 895 Helio and 1108 Demeter http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2016MPBu...43..310P The Minor Planet Bulletin 43 4 310 1052-8091 2016MPBu...43..310P 8 March 2018 6 Pedro Brines Juan Lozano Onofre Rodrigo A. Fornas David Herrero Vicente Mas G. Fornas Carreñ A. o Enrique Arce April 2017 Sixteen Asteroids Lightcurves at Asteroids Observers (OBAS) - MPPD: 2016 June–November http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017MPBu...44..145B The Minor Planet Bulletin 44 2 145–149 1052-8091 2017MPBu...44..145B 8 March 2018 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 March 2018 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 1108 1107 Lictoria 1108 1109 Tata 001108 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001108 19290531 Category:Demeter