Assume for a moment that that IS a brown dwarf.

If that's the case, then I actually see some good news here. It's between us and the Sun (which means it is closer to the sun than we are), and it is getting bigger (which means it is moving away from the sun now). THAT means that it has already gone around the sun and is now leaving the inner system, and we only have to survive THIS pass, not three 'conjunctions' as I have seen posted for the Elenin orbit. Flaw with this logic?