Well written article, the only thing missing is the current magnitude, but that's probably nit-picking.  Its really nice to read such a good article in what appears to be a non-scienctific paper.  Mad e me think of Hale-Bopp.  That was spotted long before (and long after) its arrival.  It was a joy to follow.  Looks like 2013 is going to be a particularly fun year. Thanks for the post, we'll all be watching.