I watched the op vid while watching porn so was a little distracted,but, if this thing is on a 3600 year journey and is to go through our solar system in a month but the ever slowly enlarging ball of fire in the sky seems a little slow to develop.

Also if this thing gets as close to the Sun as they say why doesn't our star pull it into its gravitational well and keep it.
This thing is to far from its original star for it to keep its effect on it, or it would have pull us to it by now.

Just random thoughts.