1111 Reinmuthia

Very elongated asteroid from the background population October 2019 yes 1111 Reinmuthia #D6D6D6 001111-asteroid shape model (1111) Reinmuthia.png Shape model of Reinmuthia from its lightcurve K. Reinmuth Heidelberg Obs. 11 February 1927 (1111) Reinmuthia 1927 CO1929 QG Karl Reinmuth(the discoverer) main-belt(outer) background 4 September 2017 (JD 2458000.5) 0 90.72 yr (33,137 days) 3.2947 AU 2.6911 AU 2.9929 AU 0.1008 5.18 yr (1,891 days) 329.12° 0.1904 ms / day 3.8917° 132.44° 236.17° 24.38 0.48 km41.26 km (derived) 4.00742 0.00005 h4.007347 h4.00750 0.00003 h4.0075 0.0001 hlightcurve-plot-Hamanowa4.02 h (356.0°, 68.0°) (λ1/β1) (153.0°, 78.0°) (λ2/β2) 0.057 (assumed)0.167 0.008 Tholen FXU:B–V 0.639 0.016U–B 0.230 0.030 10.6510.67 1111 Reinmuthia (provisional designation: 1927 CO) is a very elongated asteroid from the background population, located in the outer region of the asteroid belt. It was discovered on 11 February 1927, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. The F-type asteroid (FX) has a short rotation period of 4.02 hours and measures approximately 40 km mi off 2 us in diameter. It was later named in honor of Karl Reinmuth, the discoverer himself. Orbit and classification Reinmuthia is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It orbits the Sun in the outer asteroid belt at a distance of 2.7–3.3 AU once every 5 years and 2 months (1,891 days; semi-major axis of 2.99 AU). Its orbit has an eccentricity of 0.10 and an inclination of 4° with respect to the ecliptic. The body's observation arc begins at Heidelberg with its official discovery observation. Naming This minor planet was named after its discoverer, Karl Reinmuth (1892–1979), a German astronomer at the Heidelberg-Königstuhl State Observatory and a prolific discoverer of minor planets. In total, he discovered 395 asteroids, most of them during the 1920s and 1930s, which was a unique record for many years. His discoveries include 1862 Apollo and 69230 Hermes, two lost asteroids and near-Earth objects as well as several large Jupiter trojans. His 1931-discovered asteroid (11435) 1931 UB is the oldest discovered yet still unnamed asteroid. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 104). Physical characteristics thumb|left|265px|Lightcurve-based 3D inversion model of Reinmuthia In the Tholen classification, Reinmuthia has an ambiguous spectral type, closest to that of a dark F-type and somewhat similar to an X-type asteroid. The spectrum had also been flagged as "unusual" and "nosy" by Tholen (FXU:). Rotation period Rotational lightcurves of Reinmuthia have been obtained from photometric observations by American astronomer Richard Binzel as well as by Hiromi and Hiroko Hamanowa at the Hamanowa Astronomical Observatory D91 in Japan (U=3/3/3). Lightcurve analysis gave a consolidated, well-defined rotation period of 4.02 hours with a high brightness amplitude between 0.61 and 0.95 magnitude (U=3).lightcurve-plot-Hamanowa Poles and shape Lightcurve inversion also modeled the body's shape and poles. In 2013, modelling by an international study using photometric data from the US Naval Observatory, the Uppsala Asteroid Photometric Catalogue, the Palomar Transient Factory and the Catalina Sky Survey gave a similar sidereal period of 4.007347 hours and two spin axes of (356.0°, 68.0°) and (153.0°, 78.0°) in ecliptic coordinates (λ, β). The body's very elongated shape had already been indicated by the high brightness variation measured during the photometric observations. Diameter and albedo According to the survey carried out by the Japanese Akari satellite, Reinmuthia measures 24.38 kilometers in diameter and its surface has an albedo of 0.167. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and derives a diameter of 41.26 kilometers based on an absolute magnitude of 10.65. Notes lightcurve-plot-Hamanowa Lightcurve plot of (1111) Reinmuthia, by H. & H. Hamanowa (2009) from observations at the Hamanowa Astronomical Observatory D91. Rotation period 4.0075 0.0001 hours (0.166979 days) and a brightness amplitude of 0.945 0.005 mag. Summary figures at the LCDB References 30em 2017-11-02 last obs. JPL Small-Body Database Browser: 1111 Reinmuthia (1927 CO) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001111 Jet Propulsion Laboratory 26 January 2018 Dictionary of Minor Planet Names Schmadel Lutz D. Springer Berlin Heidelberg (1111) Reinmuthia 94 2007 10.1007/978-3-540-29925-7_1112 978-3-540-00238-3 1111 Reinmuthia (1927 CO) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1111 26 January 2018 Asteroids and comets rotation curves – (1111) Reinmuthia Behrend Raoul Geneva Observatory http://obswww.unige.ch/~behrend/page3cou.html#001111 26 January 2018 3 December 2002 https://web.archive.org/web/20021203214643/http://obswww.unige.ch/~behrend/page3cou.html#001111 dead 1111 26 January 2018 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) Binzel, R. P. October 1987 A photoelectric survey of 130 asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1987Icar...72..135B Icarus 135–208 0019-1035 1987Icar...72..135B 10.1016/0019-1035(87)90125-4 26 January 2018 Hamanowa Hiromi Hamanowa Hiroko July 2009 Lightcurves of 494 Virtus, 556 Phyllis, 624 Hektor 657 Gunlod, 111 Reinmuthia, 1188 Gothlandia, and 1376 Michelle Minor Planet Bulletin http://www.minorplanet.info/MPB/issues/MPB_36-3.pdf 36 3 87–88 2009MPBu...36...87H 1052-8091 13 March 2020 26 November 2021 https://web.archive.org/web/20211126122428/http://www.minorplanet.info/MPB/issues/MPB_36-3.pdf dead 6 Hanuš J. Ďurech J. Brož M. Marciniak A. Warner B. D. Pilcher F. Stephens R. Behrend R. Carry B. Čapek D. Antonini P. Audejean M. Augustesen K. Barbotin E. Baudouin P. Bayol A. Bernasconi L. Borczyk W. Bosch J. -G. Brochard E. Brunetto L. Casulli S. Cazenave A. Charbonnel S. Christophe B. Colas F. Coloma J. Conjat M. Cooney W. Correira H. Cotrez V. Coupier A. Crippa R. Cristofanelli M. Dalmas Ch. Danavaro C. Demeautis C. Droege T. Durkee R. Esseiva N. Esteban M. Fagas M. Farroni G. Fauvaud M. Fauvaud S. Del Freo F. Garcia L. Geier S. Godon C. Grangeon K. Hamanowa H. Hamanowa H. Heck N. Hellmich S. Higgins D. Hirsch R. Husarik M. Itkonen T. Jade O. Kamiński K. Kankiewicz P. Klotz A. Koff R. A. Kryszczyńska A. Kwiatkowski T. Laffont A. Leroy A. Lecacheux J. Leonie Y. Leyrat C. Manzini F. Martin A. Masi G. Matter D. Michałowski J. Michałowski M. J. Michałowski T. Michelet J. Michelsen R. Morelle E. Mottola S. Naves R. Nomen J. Oey J. Ogłoza W. Oksanen A. Oszkiewicz D. Pääkkönen P. Paiella M. Pallares H. Paulo J. Pavic M. Payet B. Polińska M. Polishook D. Poncy R. Revaz Y. Rinner C. Rocca M. Roche A. Romeuf D. Roy R. Saguin H. Salom P. A. Sanchez S. Santacana G. Santana-Ros T. Sareyan J. -P. Sobkowiak K. Sposetti S. Starkey D. Stoss R. Strajnic J. Teng J. -P. Trégon B. Vagnozzi A. Velichko F. P. Waelchli N. Wagrez K. Wücher H. March 2013 Asteroids' physical models from combined dense and sparse photometry and scaling of the YORP effect by the observed obliquity distribution Astronomy and Astrophysics 551 A67 2013A&A...551A..67H 0004-6361 10.1051/0004-6361/201220701 1301.6943 Asteroid 1111 Reinmuthia Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1111+Reinmuthia 13 March 2020 https://web.archive.org/web/20200526033349/https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1111+Reinmuthia 26 May 2020 dead Asteroid 1111 Reinmuthia – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1111 13 March 2020 External links Lightcurve Database Query (LCDB), at www.minorplanet.info 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 – Geneva Observatory, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1111 1110 Jaroslawa 1111 1112 Polonia 001111 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 001111 19270211