Citizen Scientists Spot Super Fast Moving Object In NASA Data
Here is another article on it:
https://thedebrief.org/nasa-citizen-scientists-spot-unidentified-speeding-object-racing-through-space-at-1-million-mph/
I bet it's Jebediah Kerman!
(In early KSP and on at least one clone/similarly-themed Android version, I have been known to almost trivially throw craft into highly retrograde hyperbolic orbits, even
without any true gravitational slingshotting. With that, I'd be surprised if there
weren't a number of high-relative-velocity ejections of companion bodies (and maybe, afterwards, an Oumuamua-like swing round another system), and some of those will emerge galactically-retrograde to the system at leaves, perhaps even at system-relative speeds that are also retrograde in galaxy-retrograde terms. Properly projecting the path both forwards
and back is the key; given the inward travel, and likely age of body, it would more probably be a slow back-escape from an outer system than having started off initially as a fast back-escape from an inner one (over half an orbit ago). Although, given the densities of bodies near the centre, there would be potentially more interactions that
might last (to remain not further disturbed, and detectable) for at least a significant part of one orbit.)