{"id":96270,"date":"2025-03-13T15:02:24","date_gmt":"2025-03-13T15:02:24","guid":{"rendered":"https:\/\/www.africa-press.net\/cotedivoire\/politique\/la-sonde-hera-va-survoler-mars-et-sa-mysterieuse-lune-deimos"},"modified":"2025-03-13T15:02:24","modified_gmt":"2025-03-13T15:02:24","slug":"la-sonde-hera-va-survoler-mars-et-sa-mysterieuse-lune-deimos","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/cotedivoire\/toutes-les-actualites\/la-sonde-hera-va-survoler-mars-et-sa-mysterieuse-lune-deimos","title":{"rendered":"La sonde Hera va survoler Mars et sa myst\u00e9rieuse lune Deimos"},"content":{"rendered":"

Africa-Press – C\u00f4te d’Ivoire. <\/strong><\/span>En octobre 2024, l’Agence spatiale europe\u0301enne (ESA) a lance\u0301 Hera, une mission de\u0301die\u0301e a\u0300 l’e\u0301tude du syste\u0300me binaire d’aste\u0301roi\u0308des Didymos, et plus particulie\u0300rement de Dimorphos, la petite lune impacte\u0301e par la mission DART de la Nasa en 2022. Mais avant d’arriver a\u0300 destination, la sonde effectuera un passage rapproche\u0301 de Mars le 12 mars 2025. Cette assistance gravitationnelle lui permettra de gagner en vitesse tout en re\u0301alisant des observations ine\u0301dites sur Deimos, la plus petite des deux lunes martiennes.<\/p>\n

Un tremplin vers Didymos<\/b><\/p>\n

Au cours de ce survol, Hera s’approchera au plus pre\u0300s de Mars a\u0300 13h50 (heure de Paris) et utilisera sa came\u0301ra de cadrage d\u2019aste\u0301roi\u0308des (AFC) dans le visible, son spectrome\u0300tre imageur Hyperscout-H dans le visible et le proche infrarouge ainsi que l\u2019imageur dans l\u2019infrarouge thermique (TIRI) de la JAXA pour observer Mars et Deimos. Les trois syste\u0300mes de came\u0301ras de la sonde permettront d\u2019obtenir des images de Mars a\u0300 environ 5000 km de distance, et de Deimos a\u0300 seulement 1000 km, offrant ainsi une occasion exceptionnelle d\u2019e\u0301tudier ce petit objet myste\u0301rieux et d\u2019e\u0301talonner les instruments scientifiques d\u2019Hera.<\/p>\n

Deimos gravite autour de Mars a\u0300 une distance d\u2019environ 23.400 km. C’est la plus petite et la plus e\u0301loigne\u0301e des deux lunes martiennes. Ce petit satellite de mars mesure environ 12 km de diame\u0300tre et sa surface sombre rappelle celle des aste\u0301roi\u0308des de type C. Une the\u0301orie veut que Deimos et Phobos, l\u2019autre lune de Mars, proviennent de la ceinture principale d\u2019aste\u0301roi\u0308des. Une autre sugge\u0300re qu’un impact avec la plane\u0300te rouge serait a\u0300 l\u2019origine de leur formation. Les donne\u0301es de Hera pourraient apporter des e\u0301le\u0301ments de re\u0301ponse et comple\u0301ter celles qui seront collecte\u0301es par la mission japonaise MMX (Martian Moons eXploration), attendue pour 2026.<\/p>\n


\nUn pas de plus vers la de\u0301fense plane\u0301taire<\/b><\/p>\n

Hera a pour objectif premier d\u2019e\u0301valuer les effets de l’impact de DART sur Dimorphos et de perfectionner les strate\u0301gies de de\u0301viation d\u2019aste\u0301roi\u0308des, ce de\u0301tour par Mars s’inscrit aussi dans une logique plus large d’exploration et de validation technologique. Tester la navigation et l’imagerie haute re\u0301solution sur Deimos permettra de mieux pre\u0301parer l’e\u0301tude de\u0301taille\u0301e de Didymos et Dimorphos.<\/p>\n

Hera est une mission de de\u0301fense plane\u0301taire conduite par l\u2019ESA, de\u0301veloppe\u0301e dans le cadre d\u2019une initiative internationale de grande envergure, le projet AIDA (analyse d\u2019impact et de de\u0301viation d\u2019un aste\u0301roi\u0308de). Ce passage rapproche\u0301 illustre ainsi la flexibilite\u0301 des missions spatiales modernes, capables d\u2019adapter leur trajectoire pour maximiser les retours scientifiques.<\/p>\n

Pour plus d’informations et d’analyses sur la C\u00f4te d’Ivoire<\/span>, suivez Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – C\u00f4te d’Ivoire. En octobre 2024, l’Agence spatiale europe\u0301enne (ESA) a lance\u0301 Hera, une mission de\u0301die\u0301e a\u0300 l’e\u0301tude du syste\u0300me binaire d’aste\u0301roi\u0308des Didymos, et plus particulie\u0300rement de Dimorphos, la petite lune impacte\u0301e par la mission DART de la Nasa en 2022. Mais avant d’arriver a\u0300 destination, la sonde effectuera un passage rapproche\u0301 de Mars […]<\/p>\n","protected":false},"author":82,"featured_media":96269,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[37],"class_list":["post-96270","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-cote-divoire-2"],"yoast_head":"\nLa sonde Hera va survoler Mars et sa myst\u00e9rieuse lune Deimos - C\u00f4te d'Ivoire<\/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.africa-press.net\/cotedivoire\/politique\/la-sonde-hera-va-survoler-mars-et-sa-mysterieuse-lune-deimos\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La sonde Hera va survoler Mars et sa myst\u00e9rieuse lune Deimos\" \/>\n<meta property=\"og:description\" content=\"Africa-Press – C\u00f4te d’Ivoire. En octobre 2024, l’Agence spatiale europe\u0301enne (ESA) a lance\u0301 Hera, une mission de\u0301die\u0301e a\u0300 l’e\u0301tude du syste\u0300me binaire d’aste\u0301roi\u0308des Didymos, et plus particulie\u0300rement de Dimorphos, la petite lune impacte\u0301e par la mission DART de la Nasa en 2022. 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