[P-PS03] Solar System Small Bodies: A New Frontier Arising Hayabusa 2, OSIRIS-REx and Other Projects

[PPS03-25] Overview and current status of DESTINY⁺ mission

★Invited Papers

*荒井 朋子¹、小林 正規¹、石橋 高¹、吉田 二美¹、木村 宏¹、平井 隆之¹、洪 鵬¹、山田 学¹、千秋 博紀¹、和田 浩二¹、スラマ ラルフ²、クルーガー ハラルド³、渡部 潤一⁴、伊藤 孝士⁴、石黒 正晃⁵、中村 智樹⁶、薮田 ひかる⁷、橘 省吾⁸、三河内 岳⁸、阿部 新助⁹、大塚 勝仁¹⁰、浦川 聖太郎¹¹、中村メッセンジャー 圭子¹²、小松 睦美¹³、亀田 真吾¹⁴、鍵谷 将人⁶、平田 成¹⁵、出村 裕英¹⁵、佐々木 晶¹⁶、廣井 隆弘¹⁷、小松 吾郎¹⁸、金田 英宏¹⁹、稲守 孝哉¹⁹、岡本 尚也²⁰、柳沢 俊史²⁰、吉川 真²⁰、矢野 創²⁰、岡田 達明²⁰、岩田 隆浩²⁰、大坪 貴文²⁰、川勝 康弘²⁰、豊田 裕之²⁰、西山 和孝²⁰、高島 健²⁰ (1.千葉工業大学惑星探査研究センター、2.シュツットガルト大学、3.マックスプランク研究所、4.国立天文台、5.ソウル大学、6.東北大学、7.広島大学、8.東京大学、9.日本大学、10.東京流星観測網、11.日本スペースガード協会、12.NASA、13.総合研究院大学、14.立教大学、15.会津大学、16.大阪大学、17.ブラウン大学、18.ダヌンツィオ大学、19.名古屋大学、20.宇宙航空研究開発機構)

キーワード：デスティニープラス、フェートン、フライバイ、ふたご座流星群、惑星間塵

DESTINY⁺ (Demonstration and Experiment of Space Technology for INterplanetary voYage, Phaethon fLyby and dUst Science) was selected in 2017 as a mission for JAXA/ISAS small-class program. It is a joint mission of technology demonstration and scientific observation. It will test high performance electric propelled vehicle technology and high-speed flyby of asteroid (3200) Phaethon and possibly asteroid 2005UD, which a break-up body from Phaethon as an extended mission. Engineering challenges include an up-close encounter at a distance of 500 km from Phaethon with radio-optical hybrid navigation guidance and control, and autonomous imaging based on optical information for target tracking during a high-speed flyby of 33km/sec. The science goal is to understand the nature and origin of cosmic dust brought onto the Earth, in the context of exogenous contribution of carbon and organics for possible prebiotic seeds of the terrestrial life. Phaethon is a parent body of Geminid meteor shower, and thus a known source to periodically provide dust to the Earth, via the dust stream. The science objectives are two folded: (1) in-situ analyses of velocity, arrival direction, mass and chemical composition of interplanetary and interstellar dust particles around 1 au, the dust trail, and nearby Phaethon, and (2) flyby imaging of Phaethon to study its geology, for understanding dust ejection mechanism of active asteroid and the surface compositional variation. High-spatial-resolution images of less than 5 meter per pixel are obtained with Telescopic camera (TCAP), and VIS-NIR spectral images of less than 100 meter per pixel are taken with multiband camera (MCAP). Mass, speed, arrival direction and chemical composition for each dust particle are analyzed with dust analyzer (DDA). Here, we present an overview and the current status of DESTINY⁺ mission.