Meet Phaethon, a weird asteroid that thinks it's a comet – our new research may explain what's going on 

 Meet Phaethon, a "rock comet" that blurs the definitions between asteroid and comet, and learn why it will be worth paying attention to this fascinating object in the coming years. 

https://cdn.mos.cms.futurecdn.net/CHf9wjTKyfo9UMpodgU4HV.jpg

https://www.space.com/space-exploration/asteroid-comet-missions/meet-phaethon-a-weird-asteroid-that-thinks-its-a-comet-our-new-research-may-explain-whats-going-on