– Jag anv\u00e4nde en spalt p\u00e5 min spektrometer som m\u00e4ter 20\u00b5m x 2 mm vilket ganska lagom ger ett tv\u00e4rsnitt av kometens koma med min refraktor som har br\u00e4nnvidd f = 616 mm (se bild 2), ber\u00e4ttar Hans.<\/p>\n\n\n\n
– Komat best\u00e5r som bekant av molekyler som sublimerar fr\u00e5n kometk\u00e4rnan och mitt spektrum ger viss information om inneh\u00e5llet via emissionsspektrum i det visuella omr\u00e5det samt delar av angr\u00e4nsande UV och IR.<\/p>\n\n\n\n
– Det mest k\u00e4nda \u00e4mnet \u00e4r C\u2082 radikalerna som ger de ber\u00f6mda \u201dSwan banden\u201d. Vidare ser vi CN, C\u2083 och NH\u2082. Det var k\u00e4nnedom om CN (Cyanid) som gav upphov till paniken \u00e5r 1910 n\u00e4r jordbanan korsade svansen till Halley`s komet.<\/p>\n\n\n\n
<\/p>\n\n\n\n Ett spektrum fr\u00e5n n\u00e4raliggande bakgrund anv\u00e4ndes f\u00f6r att subtrahera bort inverkan av ljusf\u00f6roreningarna i Malm\u00f6.<\/p>\n\n\n\n Exponeringstid: Koma 12 x 300s, Bakgrund 6 x 300s.<\/p>\n\n\n\n Spektrometer: SX-Spectrograph Pro.<\/p>\n\n\n\n Optik: Refraktor 110mm f\/5,6.<\/p>\n\n\n\n <\/p>\n\n\n\n Kometens spektrum s\u00e4krat p\u00e5 “Mt Hindby” Hans Hilderfors lyckades ig\u00e5r kv\u00e4ll – mitt i stormen i Malm\u00f6, med gatljus och annat sattyg i v\u00e4gen – s\u00e4kra ett spektrum av vinterkometen C\/2022 E3 (ZTF), som ibland kallas ZTF-kometen (efter uppt\u00e4ckten i Californien med hj\u00e4lp av ZTF-maskineriet), ibland Neanderthal-kometen (den syntes f\u00f6rra g\u00e5ngen d\u00e5 neanderthalarna regerade primatriket… L\u00e4s mer »Nr 9 2023<\/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\/92556"}],"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=92556"}],"version-history":[{"count":5,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/92556\/revisions"}],"predecessor-version":[{"id":92565,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/posts\/92556\/revisions\/92565"}],"wp:attachment":[{"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/media?parent=92556"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/categories?post=92556"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-json\/wp\/v2\/tags?post=92556"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/www.astb.se\/cassiopeiabloggen\/wp-content\/uploads\/2023\/01\/C_2022-E3-ZTF-spektrum-1.jpg\")
<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"