NO on many counts.
No on the claim that it will be 100 times Hiroshima. That is an estimate an "up to." In reality, ALLLLLL we know is that it's too far away to know the size of it. It could be small. It could be man-made space junk. It could possibly wipe out life, or it could hit the atmosphere and burn up. And no on this, and I stress this STRONGLY
HULK. FOR GOD'S SAKE, please, for the sake of not worrying anyone, the odds are 1:500, NOT 500:1. 500:1 means it's 500 times more likely to happen than not, and that is opposite of the truth in this case.
BTW, Tripleshot....I am with you. This is not amusing, and I don't see how people can just laugh this stuff off. This is a SERIOUS threat. One we are not prepared to deal with in any way, shape, form, or fashion.
Ricky
DesignDawg