http://www.newsweek.com/enigmatic-rare-blue-asteroid-phaethon-baffles-astronomers-1185963

A very weird and very rare blue asteroid recently flew by Earth and astronomers observing discovered something weird—it might not be an asteroid at all.

The space rock, known as (3200) Phaethon, is responsible for the Geminid meteor shower—one of the most prolific shooting star displays of the year, which peaks in the middle of December.