{"id":23085,"date":"2011-11-08T12:56:16","date_gmt":"2011-11-08T11:56:16","guid":{"rendered":"http:\/\/www.astb.se\/cassiopeiabloggen\/?p=23085"},"modified":"2011-11-09T10:44:27","modified_gmt":"2011-11-09T09:44:27","slug":"nr-281-2011","status":"publish","type":"post","link":"https:\/\/www.astb.se\/cassiopeiabloggen\/2011\/11\/08\/nr-281-2011\/","title":{"rendered":"Nr 281 2011"},"content":{"rendered":"

Asteroid-extra (1):<\/span><\/h3>\n

2005 YU 55 \u00e4r h\u00e4r p\u00e5 studiebes\u00f6k<\/h2>\n

Samtidigt som vi hoppas att vi ska kunna se asteroiden 2005 YU55 fr\u00e5n Tycho Brahe-observatoriets horisont<\/a> – om v\u00e4dergudarna till\u00e5ter – b\u00f6rjar NASA pumpa ut nytagna radarbilder.<\/p>\n

6 november, i f\u00f6rrg\u00e5r, s\u00e5g 400-metersstenen ut s\u00e5 h\u00e4r:<\/p>\n

\"\"<\/a><\/p>\n

Och i g\u00e5r, 7 november, kom vi ytterligare en bit n\u00e4rmare och radarplingen avsl\u00f6jade denna runda formation:<\/p>\n

\"\"<\/a><\/p>\n

Radarbilden ovan togs n\u00e4r asteroiden l\u00e5g ungef\u00e4r 3,6 m\u00e5navst\u00e5nd fr\u00e5n oss, s\u00e5 vi f\u00f6rst\u00e5r ju med tanke p\u00e5 hur asteroiden susar fram i dag hur fort det g\u00e5r undan i rymden. En sm\u00e4ll i denna fart hade inte varit rolig f\u00f6r v\u00e5r gamla jord.<\/p>\n

Det sp\u00e4nnande med denna f\u00f6rbiilande asteroid, som ju absolut inte kan ses f\u00f6r blotta \u00f6gat men v\u00e4l i lite st\u00f6rre amat\u00f6rteleskop, \u00e4r att den varit v\u00e4ntad. En tidigare passage 1976 av en lika stor 400-metersbj\u00e4sse kom som en blixt fr\u00e5n klar himmel, om uttrycket till\u00e5ts – 24 \u00e5r efter h\u00e4ndelsen.<\/p>\n

NASA:s radarstation vid Goldtone med dess 60-metersantenn\u00a0 \u00e4r fullt sysselsatt med att burka sm\u00e5planeten<\/a> liksom planetradarn vid Arecibo, som kopplas in i dag.<\/p>\n

2005 YU55 kommer jorden s\u00e5 n\u00e4ra som 324 600 km, cirka 0,85 ggr m\u00e5nens medelavst\u00e5nd.<\/p>\n

Bra tips med senaste nytt\u00a0 om vad som \u00e4r p\u00e5 g\u00e5ng finns<\/a> p\u00e5 denna “kampanj”-sida. D\u00e4r kan vi t ex l\u00e4sa om planerade radarobservationer, spektralstudier och fotometriska best\u00e4mningar. Gemini North-teleskopet p\u00e5 Hawaii \u00e4r t ex inkopplat under 15 timmars observation – hur det nu ska hinna med utan att det gnisslar i kugghjulen.<\/p>\n","protected":false},"excerpt":{"rendered":"

Asteroid-extra (1): 2005 YU 55 \u00e4r h\u00e4r p\u00e5 studiebes\u00f6k Samtidigt som vi hoppas att vi ska kunna se asteroiden 2005 YU55 fr\u00e5n Tycho Brahe-observatoriets horisont – om v\u00e4dergudarna till\u00e5ter – b\u00f6rjar NASA pumpa ut nytagna radarbilder. 6 november, i f\u00f6rrg\u00e5r, s\u00e5g 400-metersstenen ut s\u00e5 h\u00e4r: Och i g\u00e5r, 7 november, kom vi ytterligare en bit… L\u00e4s mer »Nr 281 2011<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":[],"rop_publish_now_history":[],"rop_publish_now_status":"pending","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[3],"tags":[],"_links":{"self":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/23085"}],"collection":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/comments?post=23085"}],"version-history":[{"count":16,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/23085\/revisions"}],"predecessor-version":[{"id":23132,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/23085\/revisions\/23132"}],"wp:attachment":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/media?parent=23085"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/categories?post=23085"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/tags?post=23085"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}