Post-arrival calibration of Hayabusa2's optical navigation cameras (ONCs): Severe effects from touchdown events

Toru Kouyama, Eri Tatsumi, Y. Yokota, Koki Yumoto, Manabu Yamada, Rie Honda, Shingo Kameda, Hidehiko Suzuki, Naoya Sakatani, Masahiko Hayakawa, Tomokatsu Morota, M. Matsuoka, Yuichiro Cho, Chikatoshi Honda, Hirotaka Sawada, Kazuo Yoshioka, Seiji Sugita