{"id":82299,"date":"2021-12-09T21:05:00","date_gmt":"2021-12-09T19:05:00","guid":{"rendered":"http:\/\/life.karpat.in.ua\/?p=82299"},"modified":"2021-12-09T01:10:05","modified_gmt":"2021-12-08T23:10:05","slug":"eiffel-torony-meretu-aszteroida-tart-a-fold-iranyaba-a-hetvegen-er-ide","status":"publish","type":"post","link":"https:\/\/life.karpat.in.ua\/?p=82299&lang=hu","title":{"rendered":"Eiffel-torony m\u00e9ret\u0171 aszteroida tart a F\u00f6ld ir\u00e1ny\u00e1ba, a h\u00e9tv\u00e9g\u00e9n \u00e9r ide"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"616\" src=\"http:\/\/life.karpat.in.ua\/wp-content\/uploads\/2021\/12\/asteroid-earth-wp-dyn-shareimg-1024x616.jpg\" alt=\"\" class=\"wp-image-82300\" srcset=\"https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2021\/12\/asteroid-earth-wp-dyn-shareimg-1024x616.jpg 1024w, https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2021\/12\/asteroid-earth-wp-dyn-shareimg-300x180.jpg 300w, https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2021\/12\/asteroid-earth-wp-dyn-shareimg-768x462.jpg 768w, https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2021\/12\/asteroid-earth-wp-dyn-shareimg.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Egy, a nagyobb m\u00e9ret\u0171 f\u00f6ldk\u00f6zeli kisbolyg\u00f3k k\u00f6z\u00e9 tartoz\u00f3 \u00e9gitest k\u00f6zel\u00edti meg a F\u00f6ldet szombaton. B\u00e1r a (4660) Nereust a NASA a F\u00f6ldre potenci\u00e1lisan vesz\u00e9lyt jelent\u0151 kisbolyg\u00f3k k\u00f6z\u00e9 sorolja, t\u00f6bb milli\u00f3 kilom\u00e9terre halad el mellett\u00fcnk, \u00edgy nem jelent vesz\u00e9lyt bolyg\u00f3nkra.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A csillagaszat.hu h\u00edrport\u00e1lon kedden megjelent cikk szerint az Eiffel-torony m\u00e9ret\u00e9hez hasonl\u00f3, a NASA \u00e1ltal potenci\u00e1lisan vesz\u00e9lyesnek tekintett \u00e9gitest december 11-\u00e9n, szombaton, magyar id\u0151 szerint 14 \u00f3ra 51-kor k\u00f6zel\u00edti meg a F\u00f6ldet. Ekkor 3,93 milli\u00f3 kilom\u00e9terre (0,0263 CSE-re) lesz bolyg\u00f3nk k\u00f6z\u00e9ppontj\u00e1t\u00f3l, ami a F\u00f6ld-Hold k\u00f6zepes t\u00e1vols\u00e1g\u00e1nak (384 ezer kilom\u00e9ter) mintegy 10-szerese.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A (4660) Nereus kisbolyg\u00f3t 1982. febru\u00e1r 28-\u00e1n fedezte fel Eleanor F. Helin (1932-2009), \u00edgy az \u00e9gitestet m\u00e1r csaknem 40 \u00e9ve ismerik \u00e9s k\u00f6vetik nyomon a p\u00e1ly\u00e1j\u00e1t a csillag\u00e1szok.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A kisbolyg\u00f3, amelyet a g\u00f6r\u00f6g mitol\u00f3gia \u00f6reg tengeristen\u00e9r\u0151l, Nereusr\u00f3l neveztek el, jelenlegi p\u00e1ly\u00e1ja szerint rendszeresen, mintegy t\u00edz\u00e9venk\u00e9nt ker\u00fcl k\u00f6zel bolyg\u00f3nkhoz \u00e9s p\u00e1ly\u00e1ja alapj\u00e1n az Apollo t\u00edpus\u00fa f\u00f6ldk\u00f6zeli kisbolyg\u00f3k k\u00f6z\u00e9 sorolj\u00e1k (az Apollo-csal\u00e1d tagjai a F\u00f6ldn\u00e9l jobban megk\u00f6zel\u00edtik a Napot, \u00edgy p\u00e1ly\u00e1juk keresztezheti a f\u00f6ldp\u00e1ly\u00e1t, \u00e1m kering\u00e9si idej\u00fck 1 \u00e9vn\u00e9l hosszabb).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Nereus f\u00f6ldk\u00f6zels\u00e9ge idej\u00e9n az Ursa Maior (Nagy Medve) csillagk\u00e9p ir\u00e1ny\u00e1ban tart\u00f3zkodik \u00e9s a l\u00e1tsz\u00f3 f\u00e9nyess\u00e9ge mintegy 12,8 magnit\u00fad\u00f3 lesz. A cikk szerint az \u00e9gitest nemcsak csillag\u00e1szati \u00e9rtelemben vett k\u00f6zels\u00e9ge \u00e9s viszonylag nagyobb m\u00e9rete miatt \u00e9rdekes, hanem eddig ismert fizikai tulajdons\u00e1gai \u00e9s \u00f6sszet\u00e9tele miatt is. Rendszeres, 10 \u00e9venk\u00e9nti f\u00f6ldk\u00f6zels\u00e9ge lehet\u0151v\u00e9 teszi, hogy \u0171rszond\u00e1kkal, esetleg emberes \u0171rexped\u00edci\u00f3kkal k\u00f6zelebbr\u0151l is megvizsg\u00e1lj\u00e1k. Tov\u00e1bb\u00e1 azt felt\u00e9telezik, hogy a belseje gazdag vasban, nikkelben \u00e9s kobaltban.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mint a cikkben r\u00e1mutatnak, az egyes kisbolyg\u00f3kat becs\u00fclt p\u00e9nzbeli \u00e9rt\u00e9k\u00fck \u00e9s a b\u00e1ny\u00e1szatukkal nyerhet\u0151 profit alapj\u00e1n is rangsorolj\u00e1k. Az aszteroid\u00e1k tudom\u00e1nyos \u00e9s gazdas\u00e1gi adatb\u00e1zisa szerint a Nereus \u00e9rt\u00e9ke 4,71 milli\u00e1rd amerikai doll\u00e1r, a v\u00e1rhat\u00f3 becs\u00fclt profit 1,39 milli\u00e1rd doll\u00e1rra tehet\u0151.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A NASA besorol\u00e1sa szerint a F\u00f6ldre potenci\u00e1lisan vesz\u00e9lyt jelent\u0151 kisbolyg\u00f3k (Potentially Hazardous Asteroids, PHA) azok a legal\u00e1bb 140 m\u00e9ter \u00e1tm\u00e9r\u0151j\u0171 \u00e9gitestek, amelyek p\u00e1ly\u00e1ja 7,5 milli\u00f3 kilom\u00e9tern\u00e9l (0,05 CSE-n\u00e9l) k\u00f6zelebb h\u00faz\u00f3dik a F\u00f6ld\u00e9hez, ami egyben a k\u00e9t \u00e9gitest vesz\u00e9lyesen k\u00f6zeli tal\u00e1lkoz\u00e1s\u00e1t is lehet\u0151v\u00e9 teszi. Mivel a Nereus 7,5 milli\u00f3 kilom\u00e9tern\u00e9l is jobban megk\u00f6zel\u00edtheti bolyg\u00f3nkat, a PHA-k k\u00f6z\u00e9 sorolt\u00e1k.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jelenleg \u00f6sszesen 2223 potenci\u00e1lisan vesz\u00e9lyes aszteroid\u00e1t tartanak sz\u00e1mon, ami a becsl\u00e9sek szerint az \u00f6sszes f\u00f6ldk\u00f6zeli kisbolyg\u00f3nak mintegy 8 sz\u00e1zal\u00e9ka. Az 1 kilom\u00e9tern\u00e9l nagyobb PHA-k sz\u00e1ma 160. Az Apollo t\u00edpus\u00fa aszteroid\u00e1k teszik ki a PHA-k legn\u00e9pesebb csoportj\u00e1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A cikk szerint ma nem ismernek olyan konkr\u00e9t kis \u00e9gitestet, amely valamikor \u00fctk\u00f6zne bolyg\u00f3nkkal, de, mint \u00edrj\u00e1k, a PHA-kat azonos\u00edtani kell, \u00e9s mozg\u00e1sukat nyomon kell k\u00f6vetni. A Nereus sem jelent vesz\u00e9lyt bolyg\u00f3nkra az elk\u00f6vetkez\u0151 k\u00e9tsz\u00e1z \u00e9vben. K\u00f6vetkez\u0151 f\u00f6ldk\u00f6zels\u00e9ge 2031. m\u00e1rcius 2-\u00e1n lesz, amikor t\u00e1vol, 17,2 milli\u00f3 kilom\u00e9terre lesz bolyg\u00f3nkt\u00f3l. A mostanin\u00e1l k\u00f6zelebb csak 2060. febru\u00e1r 14-\u00e9n lesz, mintegy 1,2 milli\u00f3 kilom\u00e9terrel ker\u00fcl f\u00f6ldk\u00f6zelbe.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Forr\u00e1s: pcforum.hu<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Egy, a nagyobb m\u00e9ret\u0171 f\u00f6ldk\u00f6zeli kisbolyg\u00f3k k\u00f6z\u00e9 tartoz\u00f3 \u00e9gitest k\u00f6zel\u00edti meg a F\u00f6ldet szombaton. B\u00e1r a (4660) Nereust a NASA a F\u00f6ldre potenci\u00e1lisan vesz\u00e9lyt jelent\u0151 kisbolyg\u00f3k k\u00f6z\u00e9 sorolja, t\u00f6bb milli\u00f3 kilom\u00e9terre halad el mellett\u00fcnk, \u00edgy nem jelent vesz\u00e9lyt bolyg\u00f3nkra.<\/p>\n","protected":false},"author":4,"featured_media":82300,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15,4000,41,49,598,39],"tags":[2745,76314],"class_list":["post-82299","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-nap-hirei","category-actual-hu","category-cikkek","category-hirek","category-tudomany","category-vilag","tag-aszteroida","tag-kozelites-a-foldhoz"],"_links":{"self":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts\/82299","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=82299"}],"version-history":[{"count":0,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts\/82299\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/media\/82300"}],"wp:attachment":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=82299"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=82299"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=82299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}