JpGU-AGU Joint Meeting 2017

Presentation information

[EE] Oral

P (Space and Planetary Sciences) » P-PS Planetary Sciences

[P-PS02] [EE] Small Bodies: Exploration of the Asteroid Belt and the Solar System at Large

Mon. May 22, 2017 1:45 PM - 3:15 PM 103 (International Conference Hall 1F)

convener:eleonora ammannito(University of California Los Angeles), Taishi Nakamoto(Tokyo Institute of Technology), Masanao Abe(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Christopher T Russell(University of California Los Angeles), Sei-ichiro WATANABE(Division of Earth and Planetary Sciences, Graduate School of Science, Nagoya University), Chairperson:Taishi Nakamoto(Tokyo Institute of Technology), Chairperson:Masaki Fujimoto(Institite of Space and Astronautical Science, Japan Aerospace Exploration Agency)

2:00 PM - 2:15 PM

[PPS02-32] DESTINY+ mission: Flyby to Meteor Shower Parent Bodies

*Tomoko Arai1, Masanori Kobayashi1, Ko Ishibashi1, Shingo Kameda3, Hiroki Senshu1, Koji Wada1, Jun-ichi Watanabe2, Takashi Ito2, MASATERU ISHIGURO4, Katsuhito Ohtsuka5, Seitaro Urakawa6, Shinsuke Abe7, Tomohiko Sekiguchi8, Daisuke Kinoshita9, Makoto Yoshikawa10, Keiko Nakamura-Messenger11, Hikaru Yabuta12, Sho Sasaki13, Hiroshi Kimura14, Tomoki Nakamura15, Aiko Nakato16, Mutsumi Komatsu20, Takashi Mikouchi18, Shogo Tachibana21, Takahiro Hiroi17, Hajime Yano10, Mikiya Sato24, Noriyuki Namiki2, Ralph Srama22, Harald Kruger23, Manabu Yamada1, Ryu Funase18, Satoshi Ikari18, Naoya Ozaki18, Takaya Inamori19, Bruno Sarli10, Takahiro Iwata10, Tatsuaki Okada10, Hiroyuki Toyota10, Kazutaka Nishiyama10, Yasuhiro Kawakatsu10 (1.Planetary Exploration Research Center, Chiba Institute of Technology, 2.National Astronomical Observatory of Japan, 3.Rikkyo University, 4.Seoul National University, 5.Tokyo Meteor Network, 6.Japan Spaceguard Association, 7.Nihon University, 8.Hokkaido University of Education, 9.Taiwan National Central University, 10.Japan Aerospace Exploration Agency, 11.National Aeronautics and Space Administration , 12.Hiroshima University, 13.Osaka University, 14.Kobe University, 15.Tohoku University, 16.Kyoto University, 17.Brown University, 18.The University of Tokyo, 19.Nagoya University, 20.The Graduate University for Advanced Studies, 21.Hokkaido University, 22.University of Stuttgart, 23.Max Planck Institute, 24.Kawasaki Municipal Science Museum)

Keywords:Flyby, Meteor shower parent bodies, Interplanetary dust particles

About 40,000 metric tons per year of extraterrestrial materials enters the atmosphere and eventually reaches the ground. This extraterrestrial materials are derived either from cosmic dust background or from meteor showers. The former consists mostly of interplanetary dust and with minor interstellar dust. The latter are meteoroids generated from breakup of comets and asteroids. Parent bodies which are dynamically linked with major annual meteor showers have been identified. Meteoroid dusts are rare and important extraterrestrial matters of which origins are identified. Asteroid 3200 Phaethon is a parent body of the Geminids meteor shower, which is among the most active meteor showers. While most of the parent bodies of meteor showers are comets, cometary activity of Phaethon has only been reported near its perihelion at 0.14 AU. Phaethon is likely a comet to asteroid transitional body. Depletion of sodium, which is a moderately volatile element, and high dust density (about 2.9 g/cm3), relative to other meteor showers are reported from spectroscopic study of the Geminids meteoroid. Because of its small perihelion distance, dehydration of the surface material by solar heating is expected, but some primitive, hydrous material may still reside in its interior. Phaethon is an ideal body to understand the origin of meteoroid dusts and thermal evolution of primitive bodies in the near-Earth orbit. Also, Phaethon is the largest body among potentially hazardous asteroids (PHAs), of which cross the Earth`s orbit. Thus, Phaethon is a critical mission target both in the context of science and planetary defense. Here, we presents a flyby mission to Phaethon and its related asteroids with DESTINY+.