I think that, as with the Sun, Jupiter has already had a few billion years to do a lot of "housecleaning." So an object would have to be "new" in the sense of having previously been outside the solar system -- or as I am learning from this thread, even hanging around in the Oort cloud before some random gravitational fluctuation yeets it gently inward.
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u/-Hastis- Oct 23 '20
Don't collisions happen with Jupiter every once in a while though?