Where Is The Closest Black Hole?

but studies say that they emite radiations

Would a stellar black hole passing within 12 ly really mess up our solar system? We're only talking about 10 solar masses. As long as it's not eating something and spewing radiation, we ought to be okay.... right?

black holes are unkillable... anything you do to them makes them bigger, stronger etc kinda like the hulk or my ex-wife