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

[MZZ40-01] Super-close Flyby Mission of Hayabusa2#

*Yuya Mimasu¹, Satoshi Tanaka¹, Satoru Nakazawa¹, Takanao Saiki¹, Makoto Yoshikawa¹, Yuichi Tsuda¹ (1.Japan Aerospace Exploration Agency)

Keywords:Hayabusa2#, Flyby, Torifune, Planetary Defense

The asteroid explorer Hayabusa2 was launched in December 2014 and successfully brought samples back to Earth in December 2020 after a six-year mission. After delivering the capsule containing the samples to Earth, the spacecraft has flown away from the Earth and start a new journey in deep space. The final rendezvous target is the asteroid 1998 KY26, which is planned to arrive in 2031. In the meantime, Hayabusa2 is also planning a flyby mission to another asteroid Torifune (2001 CC21) in 2026. Originally, Hayabusa2 was designed for rendezvous mission, the telephoto capability of the onboard camera and spacecraft itself is not optimized for a flyby mission. Therefore, Hayabusa2 is planned to approach the asteroid as close as possible for observation with high orbit guidance accuracy, without using any attitude control to track the asteroid. High-accuracy navigation and trajectory guidance techniques such as those used here are similar to those practiced by DART to impact spacecraft with asteroid and are expected to contribute to future planetary defense activities. This paper presents an overview of the flyby mission of the Hayabusa2 extension mission coming next year and the status of preparations.