3 ms·
JAXA said that the mission design for the lander was one lunar day, which generally doesn't involve dropping much below 0C (https://space.stackexchange.com/a/37
by icegreentea2 2y ago
JAXA said that the mission design for the lander was one lunar day, which generally doesn't involve dropping much below 0C (https://space.stackexchange.com/a/37374 https://space.stackexchange.com/a/37374)
So ya, they probably didn't do any significant testing below 0C.