講演情報
[PPS03-01]The current status of the DESTINY+ mission: Flyby of Geminids parent (3200) Phaethon
*荒井 朋子1、小林 正規1、石橋 高1、吉田 二美1、木村 宏1、和田 浩二1、千秋 博紀1、山田 学1、洪 鵬1、平井 隆之1、岡本 尚也1、亀田 真吾2、Srama Ralph3、Harald Kruger4、石黒 正晃5、薮田 ひかる6、渡部 潤一7、伊藤 孝士7、大塚 勝仁7、中村 智樹8、橘 省吾9、三河内 岳9、小松 睦美10、中村 Messenger 圭子11、Messenger Scott11、阿部 新助12、佐々木 晶13、廣井 孝弘14、浦川 聖太郎15、関口 朋彦16、鍵谷 将人8、平田 成17、出村 裕英17、稲守 孝哉18、小松 吾郎19、野口 高明20、Lauretta Dante21、Reddy Vishnu21、Kareta Teddy21、Takir Driss22、Taylor Patrick23、藤本 正樹24、吉川 真24、大坪 貴文24、岡田 達明24、岩田 隆浩24、川勝 康弘24、豊田 裕之24、西山 和孝24、高島 建24 (1.千葉工業大学惑星探査研究センター、2.立教大学、3.シュツットガルト大学、4.マックス・プランク研究所、5.ソウル大学、6.広島大学、7.国立天文台、8.東北大学、9.東京大学、10.総合研究大学院大学、11.NASA ジョンソンスペースセンター、12.日本大学、13.大阪大学、14.ブラウン大学、15.日本スペースガード協会、16.北海道教育大学、17.会津大学、18.名古屋大学、19.ダヌンツィオ大学、20.九州大学、21.アリゾナ大学、22.SETI研究所、23.アレシボ天文台、24.宇宙航空研究開発機構)
キーワード：
小惑星フェートン、ふたご座流星群、フライバイ、デスティニープラス
DESTINY+ (Demonstration and Experiment of Space Technology for INterplanetary voYage, Phaethon fLyby and dUst Science) is a mission proposed for JAXA/ISAS Epsilon class small program, currently in the pre-project phase (Phase-A) with a launch targeted for 2022. DESTINY+ is a joint mission of technology demonstration and scientific observation. DESTINY+ will conduct a high-speed (33 km/sec), close flyby of asteroid (3200) Phaethon with a radio-optical hybrid navigation guidance and control for high-resolution imaging.
The science goal is to understand the nature and origin of cosmic dust brought to the Earth, in the context of exogenous contribution of organics to the origin of terrestrial life. Cosmic dust particles are considered to be major carriers of organic matters to the Earth and be potential precursors to the origin of terrestrial life. They are derived either from cosmic dust background or from meteor showers. The former consists mostly of interplanetary dust derived from miscellaneous comets and asteroids, with minor interstellar dust. The latter are meteoroids transported via dust streams originated from known sources, i.e. comets and asteroids whose orbit cross the Earth’s orbit. Phaethon is a parent of Geminid meteor shower. While most parent bodies of meteor showers are comets, Phaethon is an “active” asteroid with recurrent dust ejection around its perihelion (0.14 au). Phaethon is of scientific significance because it is a known carbonaceous active asteroid providing dust to the Earth, and is among the largest potentially hazardous body.
The science mission objectives are two folded: (1) to measure physical properties (velocity, orbit, mass) and chemical composition of dust around 1 au, and (2) to conduct geological observation of Phaethon upon flyby and analyze dust nearby Phaethon. The science observation is conducted with a panchromatic telescopic camera (TCAP), a Visible-NIR multiband camera (MCAP) and a dust analyzer (DDA).
The science goal is to understand the nature and origin of cosmic dust brought to the Earth, in the context of exogenous contribution of organics to the origin of terrestrial life. Cosmic dust particles are considered to be major carriers of organic matters to the Earth and be potential precursors to the origin of terrestrial life. They are derived either from cosmic dust background or from meteor showers. The former consists mostly of interplanetary dust derived from miscellaneous comets and asteroids, with minor interstellar dust. The latter are meteoroids transported via dust streams originated from known sources, i.e. comets and asteroids whose orbit cross the Earth’s orbit. Phaethon is a parent of Geminid meteor shower. While most parent bodies of meteor showers are comets, Phaethon is an “active” asteroid with recurrent dust ejection around its perihelion (0.14 au). Phaethon is of scientific significance because it is a known carbonaceous active asteroid providing dust to the Earth, and is among the largest potentially hazardous body.
The science mission objectives are two folded: (1) to measure physical properties (velocity, orbit, mass) and chemical composition of dust around 1 au, and (2) to conduct geological observation of Phaethon upon flyby and analyze dust nearby Phaethon. The science observation is conducted with a panchromatic telescopic camera (TCAP), a Visible-NIR multiband camera (MCAP) and a dust analyzer (DDA).