Not much to be honest - it's a very faint star. Even at that type of close approach, it wouldn't have been visible to the naked eye.
Am I reading tis article correctly? This thing blew through our solar system 70K years ago?
By some definitions, the outer solar system, yes - but not really the solar system as we commonly think of it. We'd still be looking at this star being somewhere around 1000 times as far from the sun as Pluto.
Wonder if there are any planets around it?