Don't do it... not like that anyway.
Here are some reasons:
0.0000000000000000000042 percent of the universe contains matter. If you want to simulate a chance of collision perhaps you should make them roll a d100,000,000,000,000,000,000 instead, with the result of a 1 causing collision. Yes, I'm being silly. Even going into "theoretical hyperspace" directly through the core of a fictional galaxy might lower that die to a d1,000,000,000, at a guess. There is just too much damn space between celestial objects.
The second and most important reason is that OSR games should have as few skill checks as you can manage. What I would propose is that when the crew want to enter hyperspace, it takes 1d4 "space combat turns" to calculate a safe trajectory. If the crew just wait the turns out, the green light on the console comes on saying warp speed ready, and it works 100% this way. However, if the players want to go NOW, because perhaps they are being bombarded, then that's where you roll the percentile dice... Why? Because the players made that choice themselves, not the dice.
Likewise, if the players don't interrogate a dungeon's environment by asking questions of the DM, then when that player steps on a trap, that's when you roll the dice.