Thermal Infrared Imaging Instruments for Planetary Defense Missions: Hera and RAMSES
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Le résumé fourni par la source
People worldwide are becoming aware of the necessity of Planetary Defense after the Chelyabinsk meteorite air burst event in 2013. Later, the kinetic impact experiment using the NASA Double Asteroid Redirect Test (DART) to asteroid Dimorphos was successfully performed in 2022, whose efficiency will be verified by the ESA Hera mission in 2026 to 2027. A close encounter to Earth of the asteroid Apophis in 2029, and the ESA-JAXA joint mission RAMSES (Rapid Apophis Mission for Space Safety) will continuously observe the asteroid during the flyby in 2029. A recent discovery of asteroid 2024YR4 was found, which was considered potentially impacting Earth in 2032. Therefore, physical properties of asteroids are essential for planetary defense studies concerning the nature of asteroids, the effect of asteroid deflection by a kinetic impact of spacecraft, and a degree of disaster caused by an asteroid impact to Earth.Thermal infrared imaging of asteroids from spacecraft is a useful method to characterize the target bodies during flyby and rendezvous to provide their thermophysical and compositional properties, as was proven in the Hayabusa2 mission. Here we present the Therma InfraRed Imager (TIRI) instrument[1,2] and future observation plans in Hera and RAMSES missions. The instrument is based on an uncooled micro-bolometer array of 1024 x 768 pixels and has a field of view of 13° x 10° and an angular resolution of 0.23 mrad/pixel. It takes images at 25 Hz. In addition, an 8-position filter wheel is equipped with a wide band (8-14 µm) filter to be used for thermal imaging, and six narrow band (centered at 7.8, 8.6, 9.6, 10.6, 11.6, and 13.0 µm, with approximately 1 µm width) to be used for multi-band imaging in comparison with laboratory experiments for meteorites and rocks at thermal infrared wavelengths.The instrument has proven its in-flight performance during the Earth-Moon system imaging just after the Hera launch in October 2024, and during the imaging of Mars and Deimos (and Phobos). The performance tested during the calibration campaign using the TIRI flight spare will be briefly shown.References Okada T. et al. SSR (2025) 221, 104.Okada T. et al. Acta Astronautica (2026) 240, 888-892.
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DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Thermal Infrared Imaging Instruments for Planetary Defense Missions: Hera and RAMSES
- Date Crossref
- 02/07/2026
- Éditeur
- Copernicus GmbH
- Type
- posted-content
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
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Japan Aerospace Exploration Agency pays non établi dans la noticeStructure de recherche
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The University of Tokyo pays non établi dans la noticeUniversité ou école supérieure
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Maebashi Institute of Technology pays non établi dans la noticeUniversité ou école supérieure
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Chiba Institute of Technology pays non établi dans la noticeUniversité ou école supérieure
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University of Aizu pays non établi dans la noticeUniversité ou école supérieure
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Hokkaido University of Education pays non établi dans la noticeUniversité ou école supérieure
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National Institute of Advanced Industrial Science and Technology pays non établi dans la noticeOrganisme public
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Royal Observatory of Belgium pays non établi dans la noticeStructure de recherche
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Vrije Universiteit Brussel pays non établi dans la noticeUniversité ou école supérieure
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United States Geological Survey pays non établi dans la noticeOrganisme public
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Astrogeology Science Center pays non établi dans la noticeStructure de recherche
Japan Aerospace Exploration Agency, The University of Tokyo et Maebashi Institute of Technology, avec 9 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.