Another interesting thing about these rovers is that they are fully autonomous. They decide on where to explore the asteroid on their own using stereocameras, p

Another interesting thing about these rovers is that they are fully autonomous. They decide on where to explore the asteroid on their own using stereocameras, photodiodes, accelerometers, gyroscope, and temperature sensors.[0][1] In the last Minerva rover much of the autonomy consisted of hopping randomly, hopping in a human specified direction where direction is estimated from solar position by the photo diodes, and survival hopping[2]. One interesting issue they have to contend with is the low albedo(0.05) of Ryugu. The low albedo(0.05)[3] makes portions of the asteroid surface a rather warm 100°C[4], which is not good for long term operation of the electronics. And of course really cold temperatures are not good for the rover either. In the last Minerva rover survivals hops were to have been performed to keep temeperatures as moderate as possible. For example, hopping away from the sun during the 'morning' and towards the sun in the 'evening.' Presumably there are also some behaviors to get out of dark ruts like the Philae probe got stuck in. [0]https://www.dlr.de/pf/Portaldata/6/Resources/lcpm/abstracts/Abstract_Yoshimitsu_T.pdf https://www.dlr.de/pf/Portaldata/6/Resources/lcpm/abstracts/... [1]http://www.hayabusa2.jaxa.jp/en/topics/20180919e/ http://www.hayabusa2.jaxa.jp/en/topics/20180919e/ [2]https://ieeexplore.ieee.org/abstract/document/1307442/ https://ieeexplore.ieee.org/abstract/document/1307442/ [3]https://en.wikipedia.org/wiki/162173_Ryugu https://en.wikipedia.org/wiki/162173_Ryugu [4]http://www.hayabusa2.jaxa.jp/en/topics/20180907e/ http://www.hayabusa2.jaxa.jp/en/topics/20180907e/