But that presumably doesn't handle the relative motion of the stars, which makes the problem even trickier, since the distances will change as you travel, no? Or is my astronomy off base here?
This also doesn't handle new bars being opened and closed as you travel. Not to mention bouncers having bad days so you will have to revisit the bar.
But they are so far apart and move on roughly the same trajectory that it shouldn't really matter.
I think your astronomy skills are correct, but if we have to worry about actual travel then you would also have to consider things like fuel capacity, refuel opportunities, the fact that you probably don't want to actually fly through a star but around it, etc.