118 Peitho

Main-belt asteroid October 2019 yes #D6D6D6 118 Peitho Karl Theodor Robert Luther 15 March 1872 (118) Peitho 000118-asteroid shape model (118) Peitho.png 3D convex shape model of 118 Peitho A872 EA ' p aɪ θ oʊ'Pitho' in Noah Webster (1884) A Practical Dictionary of the English Language Peithoian p aɪ ' θ oʊ . i ə n Πειθώ Peithō Main belt 31 July 2016 (JD 2457600.5) 2.43757 AU Gm on 2.03988 AU Gm on 2.8353 AU Gm on on 0.16315 3.81 yr (1390.1 d) 7.7427° 47.701° 33.403° 51.1620° 18.95 km/s 41.73 1.5 km 7.616 kg 0.0117 m/s2 0.0220 km/s 7.8055 h d on on7.823 h S 9.14 0.2240 0.017 ~178 K 0.25898 ms / day 144.05 yr (52615 d) 0 1.05849 AU Gm on 2.4367 AU Gm on 3.473 118 Peitho is a main-belt asteroid. It is probably an S-type asteroid, suggesting a siliceous mineralogy. It was discovered by R. Luther on March 15, 1872, and named after one of the two Peithos in Greek mythology. There have been two observed Peithoan occultations of a dim star: one was in 2000 and the other in 2003.Planet (118) Peitho von Boinik, I. F. B. Astronomische Nachrichten 145 31 http://articles.adsabs.harvard.edu/full/seri/AN.../0145//0000021.000.html 1897AN....145...31V 10.1002/asna.18981450107http://pdsproto.jpl.nasa.gov/catalog/target/Results.CFM?resultsselbox=118%20PEITHO NASA Planetary Data System 2009-12-21 https://web.archive.org/web/20090801122528/http://pdsproto.jpl.nasa.gov/catalog/target/Results.CFM?resultsselbox=118%20PEITHO 2009-08-01 dead This body is orbiting the Sun with a period of 3.81 years and an eccentricity (ovalness) of 0.16. The orbital plane is inclined by 7.7° to the plane of the ecliptic. The cross-section diameter is ~42 km. In 2009, Photometric observations of this asteroid were made at the Palmer Divide Observatory in Colorado Springs, Colorado. The resulting asymmetrical light curve shows a synodic rotation period of 7.823 ± 0.002 hours with a brightness variation of 0.15 ± 0.02 in magnitude. This was reasonably consistent with independent studies performed in 1980 (7.78 hours) and 2009 (7.8033 hours). The lightcurve inversion process has been used to construct a model of this object, suggesting a blocky shape with flattened poles. References Spin-Shape Model for 118 Peitho Franco Lorenzo Pilcher Frederick Warner Brian D. Marchini Alessandro Saya Leonella-Filippa Maurice Audejean Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 47 3 169–171 July 2020 2020MPBu...47..169F 1 Donald K. Yeomans 118 Peitho JPL Small-Body Database Browser NASA Jet Propulsion Laboratory https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=118 12 May 2016 . Brian D. Warner Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2009 March–June The Minor Planet Bulletin 36 4 172–176 October 2009 10.1016/j.pss.2012.03.009 2009MPBu...36..172W . 1203.4336 External links Lightcurve plot of 118 Peitho, Palmer Divide Observatory, B. D. Warner (2009) 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 118 117 Lomia 118 119 Althaea 000118 Category:Discoveries by Robert Luther Category:Named minor planets 000118 000118 000118 18720315