If the ice chunk was moving at cometary speed (30 km/s), then almost certainly it would be native to the solar system. A rogue from interstellar space -- this nitwit's claim -- would have hyperbolic velocity with respect to the Sun, with no real limit on the 'excess' (hyperbolic minus parabolic), and so would be considerably more energetic than the analysis given.
Nice job.
If the ice chunk was moving at cometary speed (30 km/s), then almost certainly it would be native to the solar system. A rogue from interstellar space -- this nitwit's claim -- would have hyperbolic velocity with respect to the Sun, with no real limit on the 'excess' (hyperbolic minus parabolic), and so would be considerably more energetic than the analysis given.