1227 Geranium

Carbonaceous background asteroid October 2019 yes 1227 Geranium #D6D6D6 K. Reinmuth Heidelberg Obs. 5 October 1931 (1227) Geranium 1931 TD1934 CL 1 dʒ ə ˈ r eɪ n i ə mgeranium Geranium(flowering plant) main-belt(outer)background 4 September 2017 (JD 2458000.5) 0 86.14 yr (31,463 d) 3.8358 AU 2.6018 AU 3.2188 AU 0.1917 5.77 yr (2,109 days) 23.697° 0.1707 ms / day 16.492° 0.7016° 302.84° 41.46 km (derived)46.08 0.80 km46.269 0.140 km51.025 0.535 km 12.363 0.004 h 0.0492 (derived)0.0619 0.01190.071 0.0160.076 0.003 C (SDSS–MFB) 10.1010.8 1227 Geranium, provisional designation 1931 TD, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 46 kilometers in diameter. It was discovered on 5 October 1931, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory. The asteroid was named for the flowering plant Geranium (cranesbills). Orbit and classification Geranium is a non-family asteroid from the main belt's background population. It orbits the Sun in the outer main-belt at a distance of 2.6–3.8 AU once every 5 years and 9 months (2,109 days; semi-major axis 3.22 AU). Its orbit has an eccentricity of 0.19 and an inclination of 16° with respect to the ecliptic. The body's observation arc begins at Uccle Observatory, four days after its official discovery observation at Heidelberg. Physical characteristics Geranium has been characterized as a carbonaceous C-type asteroid by SDSS–MFB (Masi Foglia Bus). Rotation period In April 2010, a rotational lightcurve of Geranium was obtained from photometric observations by astronomers at the Oakley Southern Sky Observatory in Australia. Lightcurve analysis gave a well-defined rotation period of 12.363 hours with a brightness amplitude of 0.08 magnitude, indicative for a rather spherical shape (U=3). 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, Geranium measures between 46.08 and 51.025 kilometers in diameter and its surface has an albedo between 0.0619 and 0.076. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0492 and a diameter of 41.46 kilometers based on an absolute magnitude of 10.8. Naming This minor planet was named after Geranium, a genus of flowering plants commonly known as "cranesbills". The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 113). Meta-naming The initials of the minor planets 1227 (1227) through 1234 (1234), all discovered by Reinmuth, spell out "G. Stracke". Gustav Stracke was a German astronomer and orbit computer, who had asked that no planet be named after him. In this manner Reinmuth was able to honour the man whilst honoring his wish. Nevertheless, Reinmuth directly honored Stracke by naming planet 1019 1019 Strackea later on. The astronomer Brian Marsden was honored by the same type of meta-naming using consecutive initial letters in 1995, spelling out "Brian M." in the sequence of minor planets 5694 (5694) through 5699 (5699). Reinmuth's flowers Due to his many discoveries, Karl Reinmuth submitted a large list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between 1009 (1009) and 1200 (1200). This list also contained a sequence of 28 asteroids, starting with 1054 Forsytia, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants). References 30em 2017-11-25 last obs. JPL Small-Body Database Browser: 1227 Geranium (1931 TD) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001227 https://web.archive.org/web/20200918013853/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001227 dead 18 September 2020 Jet Propulsion Laboratory 9 January 2018 Dictionary of Minor Planet Names – (1227) Geranium Schmadel Lutz D. Springer Berlin Heidelberg 102 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1228 (1227) Geranium Dictionary of Minor Planet Names – (1234) Elyna Schmadel Lutz D. Springer Berlin Heidelberg 102–103 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1235 (1234) Elyna Dictionary of Minor Planet Names – (1054) Forsytia Schmadel Lutz D. Springer Berlin Heidelberg 90 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1055 (1054) Forsytia 1227 Geranium (1931 TD) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1227 9 January 2018 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 Asteroid 1227 Geranium – Proper Elements AstDyS-2, Asteroids – Dynamic Site https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=1227 29 October 2019 1227 9 January 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 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 Kenda Albers Katherine Kragh Adam Monnier Zachary Pligge Kellen Stolze Josh West Arnold Yim Richard Ditteon October 2010 Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2009 October thru 2010 April http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2010MPBu...37..152A The Minor Planet Bulletin 37 4 152–158 1052-8091 2010MPBu...37..152A 9 January 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 1227 1226 Golia 1227 1228 Scabiosa 001227 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19311005