1269 Rollandia

Hildian asteroid October 2019 yes 1269 Rollandia #D6D6D6 G. Neujmin Simeiz Obs. 20 September 1930 (1269) Rollandia 1930 SH1926 GC 11931 VY1936 LE1961 PBA902 EAA906 SAA907 WBA918 EG r Q ' l ae n d i @ Romain Rolland(French writer) main-belt(outer)Hildabackground 27 April 2019 (JD 2458600.5) 0 117.19 yr (42,804 d) 4.2910 AU 3.5136 AU 3.9023 AU 0.0996 7.71 yr (2,816 d) 352.88° 0.1279 ms / day 2.7586° 134.71° 19.460° 0.7004 AU 3.0550 104.893 0.624 km105.19 2.8 km107.85 1.66 km 17.36 0.01 h 0.045 0.0020.0473 0.0030.048 0.000 Tholen DB–V 0.775U–B 0.271 8.78.82 1269 Rollandia, provisional designation 1930 SH, is a dark Hildian asteroid from the outermost region of the asteroid belt, approximately 105 km mi 2 us in diameter. It was discovered on 20 September 1930, by Soviet astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula. The asteroid was named after French writer Romain Rolland. The D-type asteroid has a rotation period of 17.4 hours. It was one of the last 100-kilometer sized asteroids discovered in the main belt. Orbit and classification Rollandia is a member of the orbital Hilda group, which stay in a 3:2 orbital resonance with Jupiter and are located in the outermost main belt. It is however not a member of the collisional Hilda family (001) but a non-family asteroid of the background population when applying the hierarchical clustering method to its proper orbital elements. Rollandia orbits the Sun at a distance of 3.5–4.3 AU once every 7 years and 9 months (2,816 days; semi-major axis of 3.9 AU). Its orbit has an eccentricity of 0.10 and an inclination of 3° with respect to the ecliptic. The asteroid was first observed as A902 EA at Heidelberg Observatory in March 1902. The body's observation arc also begins at Heidelberg in November 1917, with its observation as A907 WB, almost 13 years prior to its official discovery observation at Simeiz. Naming This minor planet was named after French writer Romain Rolland (1866–1944), who was awarded the Nobel Prize in Literature in 1915 (see list). The official 1269 naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 116). Physical characteristics In the Tholen classification, Rollandia is a D-type asteroid. This spectral type is common among outermost asteroids and Jupiter trojans and is known for its very low albedo (see below). Rotation period In August 2016, a rotational lightcurve of Rollandia was obtained from photometric observations by Brian Warner, Robert Stephens and Dan Coley at the Center for Solar System Studies at Landers, California (U80−U82). Analysis gave a bimodal lightcurve with a rotation period of 19.98 hours and a low brightness amplitude of 0.06 magnitude. An alternative monomodal period solution of 9.99 hours is also possible, and becomes more likely if the object is nearly spheroidal (U=2).lightcurve-plot-CS3 In April 2019, Warner re-visited the object an obtained a period of 17.36 hours. This result supersedes previous observations that gave a period of 15.32, 15.4 and 30.98 hours, respectively (U=2/2/2).Franco-2012Slyusarev-2012 Diameter and albedo According to the surveys carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Rollandia measures between 104.893 and 107.85 kilometers in diameter and its surface has an albedo between 0.045 and 0.048. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0473 and a diameter of 105.19 kilometers based on an absolute magnitude of 8.82. Based on current estimates, Rollandia was the penultimate asteroid discovered in the outer asteroid belt that was larger than 100 kilometers. The last such body was 1390 Abastumani (101 km), discovered in 1935. Notes Franco-2012 Franco (2012) web: observation from 21 March 2012 gave a rotation period 15.4 0.1 hours with a brightness amplitude of 0.08 0.01 mag. Quality Code of 2. Summary figures for (1269) Rollandia at LCDB Slyusarev-2012 Slyusarev (2012): observation from gave a rotation period 30.98 0.93 hours with a brightness amplitude of 0.02 mag. Summary figures for (1269) Rollandia at LCDB lightcurve-plot-CS3 Lightcurve plot of (1269) Rollandia by Warner, Stephens Coley (2016) at CS3. Rotation period of 19.98 0.02 hours. Summary figures at LCDB References 30em 2019-05-12 last obs. JPL Small-Body Database Browser: 1269 Rollandia (1930 SH) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001269 Jet Propulsion Laboratory 29 October 2019 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 105 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1270 (1269) Rollandia 1269 Rollandia (1930 SH) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1269 29 October 2019 6 T. Grav A. K. Mainzer J. Bauer J. Masiero T. Spahr R. S. McMillan R. Walker R. Cutri E. Wright P. R. Eisenhardt E. Blauvelt E. DeBaun D. Elsbury T. Gautier S. Gomillion E. Hand A. Wilkins January 2012 WISE/NEOWISE Observations of the Hilda Population: Preliminary Results http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...744..197G The Astrophysical Journal 744 2 15 2012ApJ...744..197G 10.1088/0004-637X/744/2/197 1110.0283 44000310 10 November 2017 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 Asteroid 1269 Rollandia – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1269 29 October 2019 1269 10 November 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) Stephane Fauvaud Marcel Fauvaud October 2013 Photometry of Minor Planets. I. Rotation Periods from Lightcurve Analysis for Seven Main-belt Asteroids http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013MPBu...40..224F The Minor Planet Bulletin 40 4 224–229 1052-8091 2013MPBu...40..224F 10 November 2017 Brian D. Warner Robert D. Stephens Daniel A. Coley January 2017 Lightcurve Analysis of Hilda Asteroids at the Center for Solar System Studies: 2016 June–September The Minor Planet Bulletin 44 1 36–41 32455390 7243970 1052-8091 2017MPBu...44...36W 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 1269 1268 Libya 1269 1270 Datura 001269 Category:Discoveries by Grigory Neujmin Category:Named minor planets 001269 19300920