HAYABUSA2 MOMENT OF TOUCHDOWN
This animation, extracted from a longer video, shows the moment of Hayabusa2's 21 February 2019 touchdown on asteroid Ryugu. JAXA
Source: Planetary Society's Watch Hayabusa2's incredible touchdown on asteroid Ryugu
The video below and GIF above show jAXA's Hayabusa-2 touch-and-go landing and sample collection from the asteroid Ryugu.
Will all the debris settle back down to the surface quickly, or could some be transported far away or to the other side of the asteroid?
How likely is it that some could have reached escape velocity relative to Ryugu?
The impactor probably had quite a large velocity and the recoil objects will be much slower. Is there anything known about the velocity of the debris? Can it be estimated from the video and then compared to the escape velocity from Ryugu's mass and size?
- Hayabusa2 moves to the final descent position using the TM, while maintaining the immediate below point altitude of 8.5m.
- At the final descent position, after changing the attitude of the spacecraft (tail up) ( in the figure), the final descent ⊿V (about 7cm/s downwards) is performed, then free-fall to touchdown.
- Continuous imaging with CAM-H starts from 59s before the final descent ⊿V.
- Automatic sequence capture at 0.2fps (85 sec) ⇒1fps (86 sec)⇒2fps (25 sec)⇒1fps (64 sec)⇒0.2fps(85 sec)