{"id":95056,"date":"2024-02-18T21:19:24","date_gmt":"2024-02-18T20:19:24","guid":{"rendered":"https:\/\/www.astb.se\/cassiopeiabloggen\/?p=95056"},"modified":"2024-02-19T10:37:27","modified_gmt":"2024-02-19T09:37:27","slug":"nr-11-2024-2","status":"publish","type":"post","link":"https:\/\/www.astb.se\/cassiopeiabloggen\/2024\/02\/18\/nr-11-2024-2\/","title":{"rendered":"Nr 12 2024"},"content":{"rendered":"\n

Orion guidar oss<\/h2>\n\n\n\n

Det finns ingen stj\u00e4rnbild som \u00e4r s\u00e5 “pedagogisk” som Orion p\u00e5 v\u00e5ra kv\u00e4llar. H\u00e4r finns allt, ljusa bl\u00e5, ljusa r\u00f6da j\u00e4ttestj\u00e4rnor, variabler, gamla stj\u00e4rnor, nya stj\u00e4rnor, en enorm m\u00e4ngd stj\u00e4rnskapande nebulosor i Vintergatsomr\u00e5det, hela M42 \u00e4r en enda stj\u00e4rnkrubba, supernovarester (Barnards b\u00e5ge) m m – det enda vi saknar p\u00e5 grund av Vintergatans skymmande nebulosam\u00f6rker \u00e4r egentligen galaxer. Men de finns d\u00e4r, och de g\u00e5r att vaska fram med lite tekniska hj\u00e4lpmedel.<\/p>\n\n\n\n

Bengt R\u00f6nde<\/strong> tog h\u00e4rom kv\u00e4llen denna fantastiska trio, “Orions b\u00e4lte”. Trion tillh\u00f6r de ikoniska himlaobjekten sen Faraos tid, och det \u00e4r mycket intressant att prata om dem f\u00f6r allm\u00e4nheten. M\u00e5nga tror att de ligger lika l\u00e5ngt ifr\u00e5n oss, men s\u00e5 \u00e4r det inte alls. De har dessutom helt olika absoluta ljusstyrkor i sig men p\u00e5 grund av avst\u00e5nden tycks de \u00e4nd\u00e5 vara lika ljusa f\u00f6r oss. <\/p>\n\n\n\n

Man skulle kunna skriva en hel bok om bara Orion! <\/p>\n\n\n

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\"\"<\/a><\/figure><\/div>\n\n\n

<\/p>\n\n\n\n

<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

<\/p>\n\n\n\n

Bengt tycker att vi ska h\u00e5lla \u00f6gat p\u00e5 NGC1990, nebulositeten vid mittstj\u00e4rnan? \u00c4r det \u00e4kta vara? Uppgifter varierar.<\/p>\n\n\n\n

Fr\u00e5n Stellarium tar vi dessa grundfakta om trion:<\/p>\n\n\n\n

Alnitak<\/strong>, trippelstj\u00e4rna, 817 ljus\u00e5r bort, apparent magnitud 1,85, absolut magnitud -5.15<\/p>\n\n\n\n

Alnilam,<\/strong> superj\u00e4tte, 1976 ljus\u00e5r, 1.65 app magn, -7.20 abs magn.<\/p>\n\n\n\n

Mintaka,<\/strong> bin\u00e4r, 916 ljus\u00e5r, 2.40 app magn, -4.84 abs magn.<\/p>\n","protected":false},"excerpt":{"rendered":"

Orion guidar oss Det finns ingen stj\u00e4rnbild som \u00e4r s\u00e5 “pedagogisk” som Orion p\u00e5 v\u00e5ra kv\u00e4llar. H\u00e4r finns allt, ljusa bl\u00e5, ljusa r\u00f6da j\u00e4ttestj\u00e4rnor, variabler, gamla stj\u00e4rnor, nya stj\u00e4rnor, en enorm m\u00e4ngd stj\u00e4rnskapande nebulosor i Vintergatsomr\u00e5det, hela M42 \u00e4r en enda stj\u00e4rnkrubba, supernovarester (Barnards b\u00e5ge) m m – det enda vi saknar p\u00e5 grund av… L\u00e4s mer »Nr 12 2024<\/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\/95056"}],"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=95056"}],"version-history":[{"count":13,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/95056\/revisions"}],"predecessor-version":[{"id":95076,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/95056\/revisions\/95076"}],"wp:attachment":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/media?parent=95056"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/categories?post=95056"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/tags?post=95056"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}