Deconstruct that, it means little

So, Pioneer 11 is definitely a Horcrux, no? However, HPMoR stuff is set in '91-'92 so Quirrelmort doesn't know this will happen. I believe I see the pattern. On another note, I wonder if Harry could make a time turner without limits concerning direction or amount of time elapsed if he understood the universe better. This is such an excellent universe for speculation!