I stepped away to get something to drink with my on super cruise, closing in on a planet. When I came back, I noticed that I wasn't in SC, my thrusters were at 0%, and my hull was at 40%. Nothing else was damaged, not even the FSD. My first thought was that I had hit atmosphere, only I was still several Mm out from the planet. I managed to Reboot/Repair and land safely, but I am confused as to what could have caused this. Any ideas?