Could this have been an outlier to the much larger asteroid that passed by the earth a few days ago?
Good question.
It's possible that they were originally part of the same, larger object, leaving them on similar orbits -- but it's more likely that they're not. It would be better for us if they were -- since the alternative is, there are lots and lots of different unrelated objects to rain down on poor little old us. My Roku handed me a related YouTube vid that I watched, the narrator was claiming (based on thin air) that all of the then-recent objects (not sure of the age of the vid) were part of the same stream of debris. The annual meteor showers (like the Perseids) were shed by specific comets and once in a while there will be a really good storm from a known stream. Another thing that happens is, an annual stream will die out for years, then roar back to life without any warning. That's not particularly good news either, when ya think about how there could be some big-assed bolides in those streams, and the Earth crosses those streams every year...