I haven't done the math, but I'd be mildly surprised if there were any dangerous effects. The Sun is just so big relative to even the largest planets, and much

I haven't done the math, but I'd be mildly surprised if there were any dangerous effects. The Sun is just so big relative to even the largest planets, and much much denser as well; I suspect that most of the ejecta thrown up by a collision would be pulled back down the gravity well before reaching Earth orbit, and the mass of a planet is so small compared to the Sun that I doubt it would alter its gravity well appreciably.