1121 Natascha

Main-belt asteroid October 2019 yes 1121 Natascha #D6D6D6 001121-asteroid shape model (1121) Natascha.png Shape model of Natascha from its lightcurve P. Shajn Simeiz Obs. 11 September 1928 (1121) Natascha 1928 RZA918 EK Natasha Tichomirova(daughter of G. Neujmin) main-belt(inner)backgroundAstraea 4 September 2017 (JD 2458000.5) 0 87.68 yr (32,024 days) 2.9500 AU 2.1428 AU 2.5464 AU 0.1585 4.06 yr (1,484 days) 285.31° 0.2426 ms / day 6.1646° 357.91° 50.379° 12.859 0.443 km14.52 0.54 km14.89 km (calculated) 13.197 0.003 h (16.0°, 59.0°) (λ1/β1) (209.0°, 50.0°) (λ2/β2) 0.160 0.0130.20 (assumed)0.294 0.023 S (assumed) 11.4011.511.80 1121 Natascha (prov. designation: 1928 RZ) is a background asteroid from the central regions of the asteroid belt. It was discovered on 11 September 1928, by Soviet astronomer Pelageya Shajn at the Simeiz Observatory on the Crimean peninsula. The presumed S-type asteroid has rotation period of 13.2 hours and measures approximately 14 km mi off us in diameter. It was named for Natasha Tichomirova, daughter of astronomer Grigory Neujmin. Orbit and classification Natascha is a non-family asteroid from the main belt's background population. Conversely, the asteroid is also considered a core member of the disputed Astraea family. It orbits the Sun in the central main-belt at a distance of 2.1–3.0 AU once every 4 years and 1 month (1,484 days; semi-major axis of 2.55 AU). Its orbit has an eccentricity of 0.16 and an inclination of 6° with respect to the ecliptic. The asteroid was first observed as A918 EK at Simeiz Observatory in March 1918. The body's observation arc begins at Heidelberg Observatory in February 1930, or 17 months after its official discovery observation at Simeiz. Naming This minor planet was named as a birthday present for Soviet hydrogeologist Natasha (Natalia) Tichomirova, daughter of Grigory Neujmin, who was an astronomer at the discovering Simeiz Observatory and prolific discoverer of minor planets himself (AN 240;409). The author of the Dictionary of Minor Planet Names, Lutz Schmadel, learned about the naming circumstances from Crimean astronomers N. Solovaya, Nataliya Sergeevna Samoilova-Yakhontova and Nikolai Chernykh (also see 1653 1653 Yakhontovia and 2325 2325 Chernykh). Physical characteristics Natascha is an assumed, stony S-type asteroid. Rotation period and poles In May 2012, a rotational lightcurve of Natascha was obtained from photometric observations by astronomers at the Oakley Southern Sky Observatory in Australia. Lightcurve analysis gave a well-defined rotation period of 13.197 hours with a brightness variation of 0.51 magnitude (U=3). A high brightness amplitude typically indicates a non-spherical shape. In 2016, a modeled lightcurve was published using photometric data from the Lowell Photometric Database. Lightcurve inversion gave a concurring period of 13.19717 0.00001 hours, as well as two spin axes of (16.0°, 59.0°) and (209.0°, 50.0°) in ecliptic coordinates (λ, β). 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, Natascha measures between 12.859 and 14.52 kilometers in diameter and its surface has an albedo between 0.160 and 0.294. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 14.89 kilometers based on an absolute magnitude of 11.5. References 30em 2017-10-29 last obs. JPL Small-Body Database Browser: 1121 Natascha (1928 RZ) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001121 Jet Propulsion Laboratory 25 January 2018 Dictionary of Minor Planet Names – (1121) Natascha Schmadel Lutz D. Springer Berlin Heidelberg 95 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1122 1121 Natascha (1928 RZ) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1121 25 January 2018 Small Bodies Data Ferret Nesvorny HCM Asteroid Families V3.0 https://sbntools.psi.edu/ferret/PropertySearch/familyForm.action 25 January 2018 https://web.archive.org/web/20170802210005/http://sbntools.psi.edu/ferret/PropertySearch/familyForm.action 2 August 2017 dead Asteroid 1121 Natascha – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1121 28 October 2019 1121 25 January 2018 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 The Astrophysical Journal Letters 759 1 5 2012ApJ...759L...8M 10.1088/2041-8205/759/1/L8 1209.5794 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) Patricia Moravec Alla Letfullina Richard Ditteon January 2013 Asteroid Lightcurve Analysis at the Oakley Observatories: 2012 May - June The Minor Planet Bulletin 40 1 17–20 1052-8091 2013MPBu...40...17M J. Durech J. Hanus D. Oszkiewicz R. Vanco March 2016 Asteroid models from the Lowell photometric database Astronomy and Astrophysics 587 6 2016A&A...587A..48D 10.1051/0004-6361/201527573 1601.02909 External links Lightcurve Database Query (LCDB), at www.minorplanet.info Dictionary of Minor Planet Names, (1121) Natascha, 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 1121 1120 Cannonia 1121 1122 Neith 001121 Category:Discoveries by Pelageya Shajn Category:Named minor planets 19280911