I have no idea why the ratio for this is so high. The system is located in the bubble and is not permit locked.
Open your Galaxy Map with
+
Tab to the search box and enter 'W Ursae' and hit
Plot route and jump there
Achievement unlocked!
Of note, this requires an upgraded Frame Shift Drive or a ship with a greater range than the starting Sidewinder. As reported, you can make the journey with a jump range of 12.4LY or greater. Its likely you can do it with less.