[M-ZZ40] International initiatives and cooperation in planetary defense

[MZZ40-10] Flyby Mission of Hayabusa2# and Planetary Defense

*Yuya Mimasu¹, Makoto Yoshikawa¹, Yuichi Tsuda¹ (1.Japan Aerospace Exploration Agency)

Keywords:Extended Mission of Hayabusa2, Asteroid Flyby, Planetary Defense

The asteroid explorer Hayabusa2 was launched by Japan Aerospace Exploration Agency on December 3^rd, 2014. The main mission of this spacecraft is to sample pieces of asteroid and bring it back to the Earth. After six years’ mission phase, Hayabusa2 finally bring the asteroid sample back to the Earth on December 6^th, 2020. The sample analysis is continuing, and many significant results are produced. After release the capsule containing the sample, the spacecraft was diverted from the Earth and start the new journey. The next rendezvous target is the asteroid 1998 KY26, which is a very small object with a diameter of about 30m and its rotation period is very fast about 10min. Hayabusa2 will arrive at this asteroid in 2031. In the meantime, it is planned to flyby to another asteroid 2001 CC21 in 2026. Since Hayabusa2 was originally designed for rendezvous mission, the telephoto capability of the onboard camera is not so good for the flyby mission. Then, it is necessary to approach the asteroid as far as the spacecraft can for the higher-resolution observation. For this flyby mission, the spacecraft is planned to approach super proximal region of the asteroid with high navigation accuracy. Such kind of highly accurate navigation and guidance technology can be contributed to the planetary defense activity. In this paper, the recent status of operation and mission concept of this flyby mission.