You need to stick the tiny maneuvering thrusters to it in any case. Or maybe just some light sails will do the trick at those distances, depending on how good y

You need to stick the tiny maneuvering thrusters to it in any case. Or maybe just some light sails will do the trick at those distances, depending on how good your aim with the primary means of propulsion was. If humanity was doing this, we'd likely attach propulsion and accelerate the entire way anyways. Unless there's some new drive technology discovered by then or we hijack something natural/environs to do it for us.