We should probably pay close attention to Comet 45 Honda.
It is scheduled for a very close flyby to earth as it is slingshots away from the sun on an eliptical orbit which is very close to ours.
Assuming the comet stays intact during the most stressful part of it’s trajectory around the sun, it is not projected to hit us. However, if it breaks apart as it makes it’s turn, we could be in a world of hurt.
Here is one of several videos on it showing that trajectory:
https://www.youtube.com/watch?v=lv5RSihhkM0
forgot to mention on Comet 45 Honda...
We should be able to see it easily around end of December before it makes it’s nearby pass in the first week of February in 2017.
I haven't seen a Honda Comet in years.
:-)