11885 Summanus

Near-Earth asteroid September 2020 yes 11885 Summanus #FFC2E0 Spacewatch Kitt Peak Obs. 25 September 1990 1990 SS NEOApollo s ʌ ' m eɪ n ə sNoah Webster (1884) A Practical Dictionary of the English Language Summānus 4 September 2017 (JD 2458000.5) 0 20.54 yr (7,504 days) 2.5119 AU 0.8950 AU 1.7035 AU 0.4746 2.22 yr (812 days) 346.75° 0.4433 ms / day 19.419° 359.89° 116.07° 0.0689 AU LD on 3 out 1.298 0.446 km 7.358 h 0.033 0.029 18.5 11885 Summanus (prov. designation: 1990 SS) is a dark asteroid and large near-Earth object of the Apollo group. It was discovered by astronomers with the Spacewatch programm at Kitt Peak Observatory on 25 September 1990. The object has a rotation period of 7.3 hours and measures approximately 1.3 km mi off 1 us in diameter. It was named after Summanus, the Roman deity of nocturnal lightning and thunder. Discovery and naming Summanus was discovered on 25 September 1990, by Spacewatch survey at the Kitt Peak Observatory, southwest of Tucson, Arizona, United States. It was the first fully automatic discovery of a near-Earth asteroid. The name Summanus is symbolic of the discovery of the asteroid by software running on a (lightning-fast) computer. Orbit The orbit is well-established with over 20 years of observations. Summanus orbits the Sun in the inner main-belt at a distance of 0.9–2.5 AU once every 2 years and 3 months (812 days). Its orbit has an eccentricity of 0.47 and an inclination of 19° with respect to the ecliptic. The closest approach to the Earth in the years 1900–2200 is 0.102 AU km mi on on on 17 March 1991, and 17 March 2011. For comparison, the distance to the Moon is about 0.0026 AU km mi on on. References 2011-04-12 last obs. JPL Small-Body Database Browser: 11885 Summanus (1990 SS) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2011885 https://web.archive.org/web/20200727103213/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2011885 dead 27 July 2020 Jet Propulsion Laboratory 2 November 2017 11885 Summanus (1990 SS) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=11885 2 November 2017 11885 2 November 2017 Twentieth Anniversary of the First Automatic Discovery of a Near-Earth Asteroid by Software -- Spacewatch Project http://spacewatch.lpl.arizona.edu/1990_SS_text.html Spacewatch September 25, 2010 2015-06-09 https://web.archive.org/web/20150922100742/http://spacewatch.lpl.arizona.edu/1990_SS_text.html 2015-09-22 dead James V. Scotti Asteroids, Comets, Meteors 1993: Proceedings of the 160th Symposium of the International Astronomical Union, Held in Belgirate, Italy, June 14–18, 1993 https://books.google.com/books?id=G8noCAAAQBAJ&q=1990+SS&pg=PA21 Springer Science & Business Media (2012) 9789401111485 1993 21 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 11885 11885 Summanus 11885 11885 11886 Kraske 011885 011885 Category:Named minor planets 19900925