Oh no! Another alien probe

[Fireball]

Why?

If it formed around its parent star, then it was in an elliptical orbit to begin with.  To go from an elliptical orbit (E < 0, negative energy, where K < U, "kinetic energy is less than potential") to a hyperbolic orbit (E > 0, where K > U) would require some interaction within its home system.  And, then, it would need to be expelled in such a way as to intersect our Sun in its galactic orbit around the Milky Way at around 250 km/s.  Given the "local frame of rest", it seems unusual that any natural object could gain enough energy to, 1) escape its parent star, and 2) to have an intersecting orbit with a neighboring stellar system.

But, "extraordinary claims demand extraordinary evidence" (unless, of course, one is a Christian or Muslim).

P.S.  Local standard of rest:

https://en.wikipedia.org/wiki/Local_standard_of_rest

Something flying into our solar system and back out doesn't surprise me at all, given the size of the universe. In fact, it has been posited that entire planets are potentially roaming space without a star to orbit. Given the fact that we almost missed it, I bet there's other shit flying around that never made it into inside the Mars orbit that we've never seen. That, or little green men (or giant red women- needn't be sexist, after all) could have welded some structure together just to mystify us all.