The range of movement would be within Aurora's line of sight, and close enough that she can clearly make out what the object is. Objects can remain hovering outside of Aurora's sight though, like if she turns her head and can't see it anymore. Of course, she can't use these against living organisms, though she may be able to pull them by other objects, such as their clothing and such. Neither can she take control over aura-covered objects. As such, she is not able to stop other's peoples attacks with her semblance, though she is able to deflect or parry them.
Close-quarters combat, though something Aurora is skilled in, is not her only or main form of combat. She also uses her throwing knives, equal in importance with her particular style. As such, Aurora may start out with either style, and is equally skilled in them. In this knife-throwing, Aurora sometimes uses her semblance to boost her throws or fix her trajectory, then of course uses it to pull the knives back. Also, she is able to use it to deflect arrows, though against guns and the such she is powerless.