Astrian would go hunter on those clone boys. Even if they did find him, he'd be a bit too tough to be taken down by a volley of blaster fire. Maybe if you got Darth Vader on his butt he would die, but his survivor skills are too good to be hunted down by clones, they'd become scared of him and he'd probably lose the Jedi way with it, and become a mercenary. Then, possibly build up a little crew in case the Empire ever tried to find him.
Most of the Jedi back then had never seen war. Order 66 likely wouldn't of happened if OUR Jedi Council paid a visit to Darth Sideous.
Or possibly get killed by a blaster bolt to the head, forgot about the head not having anything to cover it. Ha, well yeah. Something to the head will end it.