{"id":1615,"date":"2021-11-20T17:56:21","date_gmt":"2021-11-20T16:56:21","guid":{"rendered":"https:\/\/www.astro-novinky.eu\/?page_id=1615"},"modified":"2023-01-07T15:12:06","modified_gmt":"2023-01-07T14:12:06","slug":"kometa-ztf","status":"publish","type":"page","link":"https:\/\/www.astro-novinky.eu\/index.php\/kometa-ztf\/","title":{"rendered":"Kometa C\/2022 E3 ZTF &#8211; Kdy a kde ji pozorovat"},"content":{"rendered":"<figure id=\"attachment_2200\" aria-describedby=\"caption-attachment-2200\" style=\"width: 450px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/Comet-ZTF-E3-Dan-Bartlett-Oct-16-2022-S.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2200\" src=\"https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/Comet-ZTF-E3-Dan-Bartlett-Oct-16-2022-S-1024x719.jpg\" alt=\"Kometa C\/2022 E3 ZTF z 16. \u0159\u00edjna 2022. Foto: Dan Bartlett.\" width=\"450\" height=\"316\" srcset=\"https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/Comet-ZTF-E3-Dan-Bartlett-Oct-16-2022-S-1024x719.jpg 1024w, https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/Comet-ZTF-E3-Dan-Bartlett-Oct-16-2022-S-300x211.jpg 300w, https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/Comet-ZTF-E3-Dan-Bartlett-Oct-16-2022-S-768x539.jpg 768w, https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/Comet-ZTF-E3-Dan-Bartlett-Oct-16-2022-S-130x90.jpg 130w, https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/Comet-ZTF-E3-Dan-Bartlett-Oct-16-2022-S.jpg 1224w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-2200\" class=\"wp-caption-text\">Kometa C\/2022 E3 ZTF z 16. \u0159\u00edjna 2022. Foto: Dan Bartlett.<\/figcaption><\/figure>\n<p>Na zimn\u00ed obloze v lednu a \u00fanoru 2023 pom\u011brn\u011b vysoko nad obzorem budeme moci pozorovat mal\u00fdmi dalekohledy a daleko od m\u011bst tak\u00e9 na hranici viditelnosti pouh\u00fdma o\u010dima kometu C\/2022 E3 ZTF. Kometa bude nejl\u00e9pe viditeln\u00e1 od druh\u00e9 poloviny ledna do prvn\u00ed poloviny \u00fanora, v pr\u016fb\u011bhu noci velmi vysoko nad hlavou a tak\u0159ka m\u011bs\u00edc bude cirkumpol\u00e1rn\u00ed (v\u016fbec nezapadne za obzor). Nep\u016fjde o \u017e\u00e1dnou velmi jasnou &#8222;vlasatici&#8220;, ale mohla by se dostat na hranici viditelnosti pouh\u00fdma o\u010dima. V mal\u00e9m triedru rozli\u0161\u00edme i ohon.<\/p>\n<h4>Co o n\u00ed v\u00edme?<\/h4>\n<p>Kometa byla objevena 2. b\u0159ezna 2022 v r\u00e1mci \u0161iroko\u00fahl\u00e9 p\u0159ehl\u00eddky oblohy Zwicky Transient Facility (ZTF, pojmenovan\u00e9 po \u0161v\u00fdcarsk\u00e9m astronomovi Fritzi Zwickym) v americk\u00e9 Kalifornii na observato\u0159i Mt. Palomar. V dob\u011b objevu m\u011bla p\u0159ibli\u017en\u011b 17. hv\u011bzdnou velikost (velmi slab\u00fd objekt) a le\u017eela ve vzd\u00e1lenosti 4,3 astronomick\u00e9 jednotky daleko od Slunce. N\u00e1sledn\u00e1 pozorov\u00e1n\u00ed uk\u00e1zala, \u017ee jde o dlouhoperiodickou kometu s dobou ob\u011bhu asi 50 tis\u00edc let (a s bodem odslun\u00ed asi 2800 astronomick\u00fdch jednotek).<\/p>\n<p>U nov\u011b objeven\u00fdch komet je hlavn\u00ed nezn\u00e1mou pro p\u0159edpov\u011b\u010f jejich jasnosti fakt, zda u\u017e u Slunce byly nebo ne. Pokud ne, je ledo-prachov\u00e9 j\u00e1dro komety poprv\u00e9 vystaveno \u201espaluj\u00edc\u00edmu\u201c slune\u010dn\u00edmu v\u011btru a t\u011bkav\u00e9 l\u00e1tky na povrchu komet\u00e1rn\u00edho j\u00e1dra se nejd\u0159\u00edve p\u0159ekotn\u011b rozdm\u00fdchaj\u00ed a kometa za\u010dne prudce zjas\u0148ovat. Jak ale rychle nabude, tak tak\u00e9 pozbude, proto\u017ee prvn\u00ed vlna zjasn\u011bn\u00ed pak prudce ustane a kometa se stane v o\u010d\u00edch astronom\u016f i ve\u0159ejnosti zklam\u00e1n\u00edm. Kometa ZTF bude v dob\u011b maxim\u00e1ln\u00edho p\u0159ibl\u00ed\u017een\u00ed ke Slunci d\u00e1le od na\u0161\u00ed hv\u011bzdy jak Zem\u011b, tak\u017ee v\u00fdznamn\u00e9 oh\u0159\u00e1t\u00ed jej\u00edho povrchu nehroz\u00ed. A pr\u00e1v\u011b v kombinaci s jej\u00ed polohou na obloze bude snadno pozorovateln\u00fdm objektem.<\/p>\n<h4>Uvid\u00edme ji o\u010dima?<\/h4>\n<p>Kometa dos\u00e1hne 12. ledna 2023 p\u0159\u00edslun\u00ed ve vzd\u00e1lenosti 1,11 astronomick\u00e9 jednotky (asi 166 milion\u016f km) a za\u010dne b\u00fdt z\u00e1rove\u0148 cirkumpol\u00e1rn\u00ed, tedy v\u016fbec nebude zapadat pod obzor. O dva a p\u016fl t\u00fddne pozd\u011bji, <strong>1. \u00fanora 2023, prolet\u00ed nejbl\u00ed\u017ee k\u00a0Zemi<\/strong> ve vzd\u00e1lenosti 0,28 astronomick\u00e9 jednotky (asi 42 milion\u016f km). <strong>V\u00a0t\u00e9 dob\u011b bude prol\u00e9tat bl\u00edzko severn\u00edho nebesk\u00e9ho p\u00f3lu<\/strong> v souhv\u011bzd\u00ed \u017dirafy, nad \u201eVelk\u00fdm vozem\u201c, a d\u00edky jej\u00ed poloze na no\u010dn\u00ed obloze bude mo\u017en\u00e9 ji pom\u011brn\u011b snadno vyhledat mal\u00fdm dalekohledem. P\u0159edpokl\u00e1d\u00e1 se, \u017ee b\u011bhem sv\u00e9ho maxim\u00e1ln\u00edho p\u0159ibl\u00ed\u017een\u00ed k Zemi <strong>dos\u00e1hne a\u017e 5. hv\u011bzdn\u00e9 velikosti a bude tedy mo\u017en\u00e9 ji pozorovat na tmav\u00e9 obloze mimo m\u011bsta i na hranici viditelnosti pouh\u00fdma o\u010dima<\/strong>. Pro jist\u00e9 spat\u0159en\u00ed je ale nutn\u00e9 se vybavit alespo\u0148 triedrem. Aktu\u00e1ln\u00ed polohu komety najdete na webov\u00e9 str\u00e1nce <a href=\"https:\/\/theskylive.com\/c2022e3-info\">https:\/\/theskylive.com\/c2022e3-info<\/a>.<\/p>\n<p>Pozn\u00e1mka: <a href=\"http:\/\/astro.vanbuitenen.nl\/comet\/2022E3\">P\u0159edpov\u011b\u010f jasnosti komet<\/a> je velmi problematickou discipl\u00ednou. Tento text byl ps\u00e1n v listopadu 2022, je mo\u017en\u00e9, \u017ee v lednu 2023 bude kometa v\u00fdrazn\u011b jasn\u011bj\u0161\u00ed (anebo tak\u00e9 slab\u0161\u00ed) ne\u017e ud\u00e1v\u00e1 text. Je pot\u0159eba sledovat aktu\u00e1ln\u00ed informace o v\u00fdvoji komety, nap\u0159\u00edklad na webu japonsk\u00e9ho astronoma <em>Seiichi Yoshidy<\/em>: <a href=\"http:\/\/aerith.net\/comet\/weekly\/current.html\">http:\/\/aerith.net\/comet\/weekly\/current.html<\/a><\/p>\n<h4>Kdy a kde ji pozorovat?<\/h4>\n<p><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x1lliihq x1s928wv xhkezso x1gmr53x x1cpjm7i x1fgarty x1943h6x xudqn12 x3x7a5m x6prxxf xvq8zen xo1l8bm xzsf02u x1yc453h\" dir=\"auto\">Kometa ZTF se pozvolna p\u0159esune od souhv\u011bzd\u00ed Severn\u00ed koruny p\u0159es Past\u00fd\u0159e (14. \u2013 21. ledna), Draka (22. \u2013 25. ledna), Mal\u00e9ho medv\u011bda (26. \u2013 28. ledna), \u017dirafu (a\u017e do 4. \u00fanora), Vozku (do 9. \u00fanora) a\u017e do B\u00fdka. Vysoko na obloze ve dnech 11. a 12. \u00fanora tak\u00e9 uvid\u00edme jej\u00ed \u201epr\u016flet\u201c pobl\u00ed\u017e jasn\u00e9 planety Mars. Pr\u00e1v\u011b od poloviny ledna do poloviny \u00fanora se bude nach\u00e1zet nejbl\u00ed\u017ee ke Slunci i k\u00a0Zemi, a bude tedy nejjasn\u011bj\u0161\u00ed. <\/span><strong>Velkou \u010d\u00e1st tohoto obdob\u00ed bude nav\u00edc tzv. cirkumpol\u00e1rn\u00ed, tedy viditeln\u00e1 celou noc. V druh\u00e9 polovin\u011b noc\u00ed nav\u00edc vystoup\u00e1 vysoko a\u017e k nadhlavn\u00edku. Jej\u00ed pozorovac\u00ed podm\u00ednky tedy budou opravdu velmi dobr\u00e9, pro St\u0159edoevropana tak\u0159ka ide\u00e1ln\u00ed.<\/strong> D\u016fle\u017eit\u00e9 je ale ji vyhl\u00ed\u017eet daleko od m\u011bst a na tmav\u00e9 bezm\u011bs\u00ed\u010dn\u00e9 obloze.<\/p>\n<p>Hor\u0161\u00ed podm\u00ednky proto nast\u00e1vaj\u00ed kr\u00e1tce po pr\u016fletu p\u0159\u00edzem\u00edm (1. \u00fanora), nebo\u0165 jen 4 dny pot\u00e9 &#8211; 5. \u00fanora 2023 &#8211; bude M\u011bs\u00edc v \u00fapl\u0148ku. <strong>Cel\u00e9 obdob\u00ed p\u0159ed \u00fapl\u0148kem m\u00e1 smysl vyhl\u00ed\u017eet kometu hlavn\u011b v \u010dasn\u00fdch rann\u00edch hodin\u00e1ch a po \u00fapl\u0148ku naopak na ve\u010dern\u00ed obloze.<\/strong><\/p>\n<figure id=\"attachment_2166\" aria-describedby=\"caption-attachment-2166\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/01_Kometa_ZTF_mapka.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-2166\" src=\"https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/01_Kometa_ZTF_mapka-1024x576.jpg\" alt=\"Pohyb komety C\/2022 E3 ZTF mezi hv\u011bzdami mezi 18. lednem a 15. \u00fanorem 2023. Vyzna\u010dena jsou i nejv\u00fdrazn\u011bj\u0161\u00ed uskupen\u00ed \u2013 asterismus \u201eVelk\u00fd v\u016fz\u201c a souhv\u011bzd\u00ed Kassiopeii a Orionu. Kometa bude pozorovateln\u00e1 p\u0159ev\u00e1\u017en\u00e9 nad severn\u00edm obzorem. Zdroj: Petr Hor\u00e1lek\/F\u00da v Opav\u011b\/Stellarium.\" width=\"800\" height=\"450\" srcset=\"https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/01_Kometa_ZTF_mapka-1024x576.jpg 1024w, https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/01_Kometa_ZTF_mapka-300x169.jpg 300w, https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/01_Kometa_ZTF_mapka-768x432.jpg 768w, https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/01_Kometa_ZTF_mapka-1536x864.jpg 1536w, https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/01_Kometa_ZTF_mapka-1320x743.jpg 1320w, https:\/\/www.astro-novinky.eu\/wp-content\/uploads\/2022\/11\/01_Kometa_ZTF_mapka.jpg 1920w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a><figcaption id=\"caption-attachment-2166\" class=\"wp-caption-text\">Pohyb komety C\/2022 E3 ZTF mezi hv\u011bzdami mezi 18. lednem a 15. \u00fanorem 2023. Vyzna\u010dena jsou i nejv\u00fdrazn\u011bj\u0161\u00ed uskupen\u00ed \u2013 asterismus \u201eVelk\u00fd v\u016fz\u201c a souhv\u011bzd\u00ed Kassiopeii a Orionu. Kometa bude pozorovateln\u00e1 p\u0159ev\u00e1\u017en\u00e9 nad severn\u00edm obzorem. Zdroj: Petr Hor\u00e1lek\/F\u00da v Opav\u011b\/Stellarium.<\/figcaption><\/figure>\n<h4>Jak ji vyfotit?<\/h4>\n<p>V\u0161e se odv\u00edj\u00ed od toho, jak jasn\u00e1 kometa ZTF nakonec bude. Rozhodn\u011b v\u0161ak neposta\u010d\u00ed mobiln\u00ed telefon, a to i v p\u0159\u00edpad\u011b, \u017ee by dos\u00e1hla v\u011bt\u0161\u00ed jasnosti. Obecn\u011b je pot\u0159eba se na focen\u00ed komety vybavit pevn\u00fdm byteln\u00fdm stativem, citliv\u00fdm apar\u00e1tem (ide\u00e1ln\u011b plnoform\u00e1tov\u00e1 zrcadlovka \u010di bezzrcadlovka) a sv\u011bteln\u00fdm objektivem (podle jasnosti komety n\u011bjak\u00fd objektiv s ohniskovou vzd\u00e1lenost\u00ed 30 a 300 milimetry, sv\u011btelnost ide\u00e1ln\u011b f1.4, dosta\u010duj\u00edc\u00ed je je\u0161t\u011b 2.8). Nebo\u0165 kometa je mlhav\u00fd objekt, je vhodn\u00e9 se vybavit i p\u0159enosnou mont\u00e1\u017e\u00ed pro del\u0161\u00ed expozice (\u0159\u00e1dov\u011b des\u00edtky sekund) na \u00fakor men\u0161\u00edho ISO (\u0159\u00e1dov\u011b 1600-2000, sp\u00ed\u0161e ale m\u00e9n\u011b). Na ustavenou mont\u00e1\u017e um\u00edst\u00edme fotoapar\u00e1t se sv\u011bteln\u00fdm objektivem a po\u0159izujeme pr\u016fb\u011b\u017en\u011b i n\u011bkolik sn\u00edmk\u016f za sebou, kter\u00e9 pak pro lep\u0161\u00ed redukci \u0161umu a zv\u00fdrazn\u011bn\u00ed n\u011bkter\u00fdch detail\u016f slo\u017e\u00edme matematicky do jednoho obrazu. Dobr\u00fd n\u00e1stroj (a zdarma) je na toto program <a href=\"http:\/\/deepskystacker.free.fr\/english\/index.html\" target=\"_blank\" rel=\"noopener\">Deep Sky Stacker<\/a>, kter\u00fd disponuje i mo\u017enost\u00ed skl\u00e1d\u00e1n\u00ed obr\u00e1zk\u016f s kometou.<\/p>\n<h4>Kde je nyn\u00ed?<\/h4>\n<p><iframe loading=\"lazy\" src=\"https:\/\/theskylive.com\/planetarium?obj=c2022e3\" width=\"100%\" height=\"700\" data-mce-fragment=\"1\"><span style=\"display: inline-block; width: 0px; overflow: hidden; line-height: 0;\" data-mce-type=\"bookmark\" class=\"mce_SELRES_start\">\ufeff<\/span><\/iframe><\/p>\n<h4>U\u017eite\u010dn\u00e9 odkazy:<\/h4>\n<ul>\n<li><a href=\"https:\/\/theskylive.com\/planetarium?obj=c2022e3\" target=\"_blank\" rel=\"noopener\">TheSkyLive &#8211; Sou\u010dasn\u00e1 poloha komety C\/2022 E3 ZTF<\/a><\/li>\n<li><a href=\"http:\/\/astro.vanbuitenen.nl\/comet\/2022E3\" target=\"_blank\" rel=\"noopener\">Podrobn\u00e9 informace o aktu\u00e1ln\u00edm v\u00fdvoji komety C\/2022 E3\u00a0 ZTF na webu Gideon van Buitenena<\/a><\/li>\n<li><a href=\"https:\/\/spaceweathergallery.com\/comet_gallery.html\" target=\"_blank\" rel=\"noopener\">Spaceweather.com &#8211; Celosv\u011btov\u00e1 galerie komet (v\u010detn\u011b komety C\/2022 E3 ZTF)<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Na zimn\u00ed obloze v lednu a \u00fanoru 2023 pom\u011brn\u011b vysoko nad obzorem budeme moci pozorovat mal\u00fdmi dalekohledy a daleko od<\/p>\n","protected":false},"author":6,"featured_media":2200,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[],"class_list":["post-1615","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Kometa C\/2022 E3 ZTF - Kdy a kde ji pozorovat - Astro-novinky.eu<\/title>\n<meta name=\"description\" content=\"Na zimn\u00ed obloze v lednu a \u00fanoru 2023 pom\u011brn\u011b vysoko nad obzorem budeme moci pozorovat mal\u00fdmi dalekohledy a daleko od m\u011bst tak\u00e9 na hranici viditelnosti pouh\u00fdma o\u010dima kometu C\/2022 E3 ZTF. Kometa bude nejl\u00e9pe viditeln\u00e1 od druh\u00e9 poloviny ledna do prvn\u00ed poloviny \u00fanora, v pr\u016fb\u011bhu noci velmi vysoko nad hlavou a tak\u0159ka m\u011bs\u00edc bude cirkumpol\u00e1rn\u00ed (v\u016fbec nezapadne za obzor). Nep\u016fjde o \u017e\u00e1dnou velmi jasnou &quot;vlasatici&quot;, ale mohla by se dostat na hranici viditelnosti pouh\u00fdma o\u010dima. 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