{"id":242356,"date":"2022-10-21T08:42:00","date_gmt":"2022-10-21T08:42:00","guid":{"rendered":"https:\/\/www.unistellar.com\/blog\/unistellar-observers-catch-nasas-lucy-mission-target-eurybates-over-france\/"},"modified":"2022-11-09T14:09:25","modified_gmt":"2022-11-09T14:09:25","slug":"observateurs-unistellar-nasa-lucy-eurybates","status":"publish","type":"blog","link":"https:\/\/www.unistellar.com\/fr\/blog\/observateurs-unistellar-nasa-lucy-eurybates\/","title":{"rendered":"La Communaut\u00e9 Unistellar Observent Eurybates, Cible de la Mission Lucy de la NASA"},"content":{"rendered":"

[et_pb_section fb_built=\u00a0\u00bb1″ _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb background_color=\u00a0\u00bbgcid-579abc80-458a-43b5-90b5-efa821d39207″ custom_padding=\u00a0\u00bb4px||0px|||\u00a0\u00bb global_colors_info=\u00a0\u00bb{%22gcid-579abc80-458a-43b5-90b5-efa821d39207%22:%91%22background_color%22%93}\u00a0\u00bb][et_pb_row _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_column type=\u00a0\u00bb4_4″ _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][dsm_breadcrumbs _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][\/dsm_breadcrumbs][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=\u00a0\u00bb1″ _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb background_color=\u00a0\u00bbgcid-579abc80-458a-43b5-90b5-efa821d39207″ global_colors_info=\u00a0\u00bb{%22gcid-579abc80-458a-43b5-90b5-efa821d39207%22:%91%22background_color%22%93}\u00a0\u00bb][et_pb_row _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_column type=\u00a0\u00bb4_4″ _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_text _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]Le 23\u00a0octobre, l\u2019ombre d\u2019un ast\u00e9ro\u00efde est pass\u00e9e tr\u00e8s bri\u00e8vement au-dessus de la France, avec une trajectoire traversant le centre du pays selon un axe sud-nord. Elle a \u00e9t\u00e9 observ\u00e9e par des astronomes citoyens passionn\u00e9s qui ont point\u00e9 leur t\u00e9lescope Unistellar vers le ciel dans le cadre d\u2019un partenariat entre Unistellar et l\u2019Association fran\u00e7aise d\u2019astronomie<\/a> (AFA).[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=\u00a0\u00bb3_5,2_5″ make_equal=\u00a0\u00bbon\u00a0\u00bb _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb custom_css_main_element=\u00a0\u00bbdisplay: flex;||flex-direction: row;||align-items: center;\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_column type=\u00a0\u00bb3_5″ _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_text _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<\/p>\n

L\u2019ast\u00e9ro\u00efde en question n\u2019est autre qu\u2019Eurybates, une cible de la\u00a0\u00a0mission Lucy\u00a0de la NASA. En 2027, la sonde Lucy arrivera au niveau des ast\u00e9ro\u00efdes troyens, un groupe d\u2019ast\u00e9ro\u00efdes qui suit l\u2019orbite de Jupiter autour du Soleil, et dont Eurybates fait parti. Mais il reste encore beaucoup \u00e0 faire avant cette \u00e9ch\u00e9ance, et les scientifiques doivent notamment collecter de plus amples donn\u00e9es sur les cibles de la mission Lucy. Les astronomes citoyens peuvent contribuer \u00e0 ces travaux pr\u00e9paratoires en observant l\u2019ast\u00e9ro\u00efde au moment o\u00f9 il passe devant une \u00e9toile et en bloque bri\u00e8vement la lumi\u00e8re\u00a0: c\u2019est ce qu\u2019on appelle une occultation. Ces brefs aper\u00e7us sont suffisants pour donner aux astronomes des informations sur la taille de l\u2019ast\u00e9ro\u00efde, sa forme et son orbite\u00a0\u2013 autant de renseignements essentiels pour la mission Lucy.<\/p>\n

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Occultation d’une \u00e9toile par un ast\u00e9ro\u00efde.<\/em><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Unistellar et l\u2019AFA ont mobilis\u00e9 des centaines d\u2019observateurs de toute la France et du reste de l\u2019Europe pour capturer le passage d\u2019Eurybates. Cet \u00e9v\u00e9nement s\u2019est av\u00e9r\u00e9 \u00eatre l\u2019une des plus grandes campagnes d\u2019observation d\u2019une occultation \u00e0 ce jour !<\/strong> \u00a0Leurs efforts ont permis plusieurs d\u00e9tections positives de l\u2019occultation avec les t\u00e9lescopes Unistellar. Une \u00e9quipe de scientifiques de l\u2019institut SETI analysent les donn\u00e9es. Les premiers r\u00e9sultats montrent une double occultation qui sugg\u00e8re plusieurs hypoth\u00e8ses : Eurybates pourrai avoir une forme d\u2019haricot ou poss\u00e9der un crat\u00e8re. Les donn\u00e9es recueillies seront transmises aux scientifiques de la mission Lucy \u00e0 la NASA pour appuyer leurs recherches.<\/p>\n

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Patrice Girard with his Unistellar telescope.<\/em><\/p>\n

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Olivier Clerget with his Unistellar telescope.<\/em><\/p>\n

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Laurent Runigo with his Unistellar telescope<\/em><\/p>\n

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Pour les observateurs fran\u00e7ais, il s\u2019agissait \u00e9galement d\u2019une occasion rare pour d\u00e9tecter une occultation par Queta, la seule lune connue d\u2019Eurybates. Il a \u00e9t\u00e9 suppos\u00e9 que Queta pourrait obscurcir une \u00e9toile peu de temps avant ou apr\u00e8s l\u2019occultation d\u2019Eurybates. Mais en raison des incertitudes concernant la taille de cette lune, les scientifiques n\u2019\u00e9taient pas en mesure de pr\u00e9dire avec exactitude l\u2019emplacement de l\u2019ombre de Queta, ni m\u00eame si elle serait d\u00e9tectable. Les observations de Queta sont en cours d\u2019analyses dans l\u2019espoir de d\u00e9tecter son occultation.<\/p>\n

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Occultation of Eurybates with an eVscope from France.<\/figcaption><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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La sonde Lucy a \u00e9t\u00e9 lanc\u00e9e en octobre 2021 et approchera six troyens de Jupiter\u00a0\u2013 dont Eurybates et Queta\u00a0\u2013 au cours de son voyage, afin d\u2019\u00e9tudier ces myst\u00e9rieux ast\u00e9ro\u00efdes. Les troyens orbitent en deux groupes distincts et leur formation remonte aux premiers temps du syst\u00e8me solaire. Ils fonctionnent donc comme des capsules temporelles qui aident les scientifiques \u00e0 \u00e9tudier cette p\u00e9riode. En observant Eurybates et Queta, les astronomes citoyens ont directement contribu\u00e9 \u00e0 une mission de la NASA qui pourrait permettre de percer les secrets de nos origines.<\/p>\n

Nous allons r\u00e9aliser bien d\u2019autres observations d\u2019occultations d\u2019ast\u00e9ro\u00efdes en vue de l\u2019arriv\u00e9e de la mission Lucy, et toute personne disposant d\u2019un t\u00e9l\u00e9scope Unistellar peut y participer\u00a0! Vous trouverez davantage d\u2019informations sur les occultations d\u2019ast\u00e9ro\u00efdes<\/a> sur le site web d\u2019Unistellar, avec notamment les pr\u00e9dictions des occultations<\/a> qui seront visibles pr\u00e8s de chez vous.<\/p>\n

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Further readings<\/h2>\n

[\/et_pb_text][et_pb_divider color=\u00a0\u00bb#FDB82B\u00a0\u00bb _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb width=\u00a0\u00bb15%\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][\/et_pb_divider][dsm_post_carousel post_type=\u00a0\u00bbblog\u00a0\u00bb posts_number=\u00a0\u00bb6″ pagi_color=\u00a0\u00bb#FDB82B\u00a0\u00bb pagi_active_color=\u00a0\u00bb#FDB82B\u00a0\u00bb navi_color=\u00a0\u00bb#FDB82B\u00a0\u00bb post_item_bg_color=\u00a0\u00bbgcid-84086a3f-4df3-4dea-91c2-75d1b92f5c80″ _builder_version=\u00a0\u00bb4.18.0″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{%22gcid-84086a3f-4df3-4dea-91c2-75d1b92f5c80%22:%91%22post_item_bg_color%22%93}\u00a0\u00bb][\/dsm_post_carousel][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

Le 23 octobre, l\u2019ombre d\u2019un ast\u00e9ro\u00efde est pass\u00e9e tr\u00e8s bri\u00e8vement au-dessus de la France, avec une trajectoire traversant le centre du pays selon un axe sud-nord …<\/p>\n","protected":false},"author":17,"featured_media":242778,"menu_order":0,"template":"","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"1920","inline_featured_image":false},"categories":[],"tags":[],"articles_categories":[],"class_list":["post-242356","blog","type-blog","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"\nLa Communaut\u00e9 Unistellar Observent Eurybates, Cible de la Mission Lucy de la NASA - Unistellar<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.unistellar.com\/fr\/blog\/observateurs-unistellar-nasa-lucy-eurybates\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La Communaut\u00e9 Unistellar Observent Eurybates, Cible de la Mission Lucy de la NASA\" \/>\n<meta property=\"og:description\" content=\"Le 23 octobre, l\u2019ombre d\u2019un ast\u00e9ro\u00efde est pass\u00e9e tr\u00e8s bri\u00e8vement au-dessus de la France, avec une trajectoire traversant le centre du pays selon un axe sud-nord ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.unistellar.com\/fr\/blog\/observateurs-unistellar-nasa-lucy-eurybates\/\" \/>\n<meta property=\"og:site_name\" content=\"Unistellar\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/unistellaroptics\/\" \/>\n<meta property=\"article:modified_time\" content=\"2022-11-09T14:09:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.unistellar.com\/wp-content\/uploads\/2022\/10\/nasa-lucy_mission.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"700\" \/>\n\t<meta property=\"og:image:height\" content=\"473\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@unistellar\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.unistellar.com\/fr\/blog\/observateurs-unistellar-nasa-lucy-eurybates\/\",\"url\":\"https:\/\/www.unistellar.com\/fr\/blog\/observateurs-unistellar-nasa-lucy-eurybates\/\",\"name\":\"La Communaut\u00e9 Unistellar Observent Eurybates, Cible de la Mission Lucy de la NASA - 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