I don't buy the Nibiru theory.
But the videos I linked to in
comment #182 and earlier, seem plausible.
The breaking up of Comet Ison, whether it was a solid asteroid with electrical properties like that similar to a battery,
or a collection of rubble held together by statically charged and radioactive dust from stellar space,
to me, is possible to cause some of those pieces of shrapnel to be thrown into a different trajectory from the force of the explosion of the heat stressed breakup.
The size of the "V" in those videos, doesn't reassure me that it'll miss us completely.
But this subject is NOT my expertise, but it is my curiosity.