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Oumuamua could not have obtained its velocity from any known object in the Solar System. We have a complete census of objects big enough to do it within a volume out to 21 AU.
However, the odds of encountering one of these objects within the heart our solar system remain exceedingly low, with only a one-in-a-million chance that an interstellar visitor is located ...
Predictions of the LSST Solar System Yield: Near-Earth Objects, Main Belt Asteroids, Jupiter Trojans, and Trans-Neptunian Objects. The Astronomical Journal (submitted to arXiv) , 2025 DOI: ...
37,000 trans-Neptunian objects, residents of the distant Kuiper Belt — nearly 10 times the current census — shedding light on Neptune’s past migration and the outer solar system’s history.