2012 DA14: diferència entre les revisions

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'''2012 DA<sub>14</sub>''' o '''(367943) Duende''' és un [[Objecte proper a la Terra|asteroide proper a la Terra]] amb un [[diàmetre]] estimat de 50 m i una [[massa]] de 190.000 [[Tona (unitat)|tones mètriques]].<ref name="EIRS"/> Va ser descobert el 22 de febrer de [[2012]], per l'''[[Observatori Astronòmic de Mallorca]]'' amb els telescopis de La Sagra [[telecontrol|telecontrolats]] des de [[Mallorca]],<ref name="OAM2012 DA">[{{Ref-web |url=http://www.oam.es/Asteroide_2012DA14.htm |títol=OAM nuevo descubrimiento: Asteroide 2012 DA14] |consulta=2013-02-15 |arxiuurl=https://web.archive.org/web/20130109083243/http://www.oam.es/Asteroide_2012DA14.htm |arxiudata=2013-01-09 }}</ref><ref name="PER2012 DA">[http://www.elperiodico.cat/ca/noticias/ciencia/guia-sobre-lasteroide-2012-da14-2318569 Guia sobre l'asteroide 2012 DA14]</ref><ref name="MPEC2012-D51"/> set dies després de passar a 0,0174 ua (2.600.000 km) de la Terra.<ref name=jpl-close/> Els càlculs mostren que en el 15 de febrer de [[2013]], la distància entre l'asteroide i el punt central de la Terra va ser de 0,0002276 ua (34.050 km).<ref name=jpl-close/> L'asteroide passà a 27.700 km de la superfície terrestre.<ref name="news177"/> Aquest és un acostament rècord d'un objecte conegut d'aquesta mida.<ref name="news177"/>
 
== Passada de 2013 ==
* [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2012+DA14;orb=1 Physical characteristics of 2012 DA14], nasa.gov
* [http://neo.jpl.nasa.gov/risk/2012da14.html 2012 DA14 Earth Impact Risk Summary], nasa.gov
* [http://www.clayobservatory.org/press-releases/student-led-team-to-offer-real-time-video-of-asteroid-2012-da14/ Real-time video of asteroid 2012 DA14 passing Earth] {{Webarchive|url=https://archive.is/20130414114809/http://www.clayobservatory.org/press-releases/student-led-team-to-offer-real-time-video-of-asteroid-2012-da14/ |date=2013-04-14 }} (Clay Center Observatory, beginning 6 p.m. EST on Feb. 15th)
* [http://blogs.discovermagazine.com/badastronomy/2012/03/04/no-asteroid-2012-da14-will-not-hit-us-next-year/ No, asteroid 2012 DA14 will not hit us next year], Bad Astronomy blog ([[Phil Plait]], March 4, 2012)
* [http://blogs.discovermagazine.com/badastronomy/2012/03/08/cool-animation-showing-asteroid-da-14s-near-miss-next-year/ Cool animation showing asteroid DA 14′s near miss next year], Bad Astronomy blog (Phil Plait, March 8, 2012)
* [http://astrobob.areavoices.com/2012/03/06/2012-da14-sparks-asteroid-fever-plus-vesta-in-3-d 2012 DA14 sparks asteroid fever] (Astro Bob, March 6, 2012)
* [http://www.esa.int/SPECIALS/SSA/SEMWTUAYLZG_0.html Near-miss asteroid will return next year] (ESA – 15 March 2012)
* [http://www.oam.es/Asteroid_2012DA14.htm Discovery of 2012 DA14] {{Webarchive|url=https://web.archive.org/web/20120324110432/http://www.oam.es/Asteroid_2012DA14.htm |date=2012-03-24 }} (Jaime Nomen and team – La Sagra Sky Survey) - includes animated discovery images
* [http://tech.groups.yahoo.com/group/mpml/message/26732 2012 DA14 orbit calculation with a 3 day observation arc] (mpml : February 26, 2012)
* [http://tech.groups.yahoo.com/group/mpml/message/26823 Meteoroid hazard to satellites comes overwhelmingly from the marbles, not the mountains] (mpml : March 26, 2012)
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