Ockums razor: it’s a rock
Occam’s Razor - not necessarily true - sometimes the more complex answer is closer to the truth, given the billions of billions of galaxies in the observed Universe - not to mention the 300,000,000 stars in our galaxy alone.
Rocks do not adopt a perfect course to complete a perfect slingshot maneuver (to pick up speed to its next destination), passing unscathed through the solar system and around the sun except by amazing coincidence ... if you believe in them.