{"id":2119,"date":"2019-10-14T17:16:00","date_gmt":"2019-10-14T16:16:00","guid":{"rendered":"http:\/\/astroaspach.fr\/astroaspachV2\/?p=2119"},"modified":"2020-10-28T09:52:02","modified_gmt":"2020-10-28T08:52:02","slug":"les-anneaux-de-chariklo","status":"publish","type":"post","link":"http:\/\/astroaspach.fr\/astroaspachV2\/2019\/10\/14\/les-anneaux-de-chariklo\/","title":{"rendered":"Les anneaux de Chariklo"},"content":{"rendered":"<p>Les centaures sont de petits corps du syst\u00e8me solaire, tournant autour du soleil, se d\u00e9pla\u00e7ant sur des orbites instables et tr\u00e8s elliptiques entre Jupiter et Neptune. Chariklo est le plus gros d&rsquo;entre eux, de forme sph\u00e9rique, et d&rsquo;un diam\u00e8tre de 248 kilom\u00e8tres, et se \u00ab\u00a0prom\u00e8ne\u00a0\u00bb entre Saturne et Uranus.<\/p>\n<p>La plan\u00e8te Saturne est essentiellement connue pour ses anneaux depuis tr\u00e8s longtemps, un syst\u00e8me d&rsquo;anneaux autour de Uranus a \u00e9t\u00e9 d\u00e9couvert en 1977, un autre autour Jupiter a \u00e9t\u00e9 d\u00e9couvert par la sonde Voyager1 en 1979, et un troisi\u00e8me syst\u00e8me en 1984 autour de Neptune, et pris en photo par la sonde Voyager2 en 1989. La pr\u00e9sence d&rsquo;anneaux autour de plan\u00e8tes g\u00e9antes \u00e9tait une chose connue. Mais des anneaux ont \u00e9t\u00e9 d\u00e9couverts \u00e9galement autour de trois satellites de Jupiter (Ganym\u00e8de, Callisto et Europe) ainsi qu&rsquo;autour de Rh\u00e9a, satellite de Saturne.<\/p>\n<p><a href=\"http:\/\/astroaspach.fr\/astroaspachV2\/wp-content\/uploads\/2020\/10\/Chariklo_with_rings_eso1410b.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2120 alignleft\" src=\"http:\/\/astroaspach.fr\/astroaspachV2\/wp-content\/uploads\/2020\/10\/Chariklo_with_rings_eso1410b.jpg\" alt=\"\" width=\"290\" height=\"190\"><\/a>Et puis, il y a Chariklo, un tout petit corps, qui lui aussi pr\u00e9sente des anneaux. Ils ont \u00e9t\u00e9 d\u00e9couverts lors de l&rsquo;occultation d&rsquo;une \u00e9toile par Chariklo, par deux baisses d&rsquo;intensit\u00e9 lumineuse, avant et apr\u00e8s l&rsquo;occultation compl\u00e8te de l&rsquo;\u00e9toile. Ils ont 3 et 7 km d&rsquo;\u00e9paisseur, et se trouvent \u00e0 400 km de Chariklo.<\/p>\n<p>Voir la vid\u00e9o de l&rsquo;occultation :&nbsp; <a href=\"https:\/\/www.youtube.com\/watch?v=FOYwqL_5beI\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.youtube.com\/watch?v=FOYwqL_5beI<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><a href=\"http:\/\/astroaspach.fr\/astroaspachV2\/wp-content\/uploads\/2020\/10\/Chariklo_with_rings_eso1410b.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2120\" src=\"http:\/\/astroaspach.fr\/astroaspachV2\/wp-content\/uploads\/2020\/10\/Chariklo_with_rings_eso1410b.jpg\" alt=\"\" width=\"100\" height=\"66\" \/><\/a><br \/>\nLes anneaux de Chariklo<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-2119","post","type-post","status-publish","format-standard","hentry","category-raconter-le-ciel"],"_links":{"self":[{"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/posts\/2119","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/comments?post=2119"}],"version-history":[{"count":7,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/posts\/2119\/revisions"}],"predecessor-version":[{"id":2141,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/posts\/2119\/revisions\/2141"}],"wp:attachment":[{"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/media?parent=2119"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/categories?post=2119"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/tags?post=2119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}