NASA has designated Asteroid 2015 TB145 as a “potentially hazardous object” (PHO), but don’t be scared because that only means that it is a “near-Earth asteroid or comet with an orbit such that it has the potential to make close approaches to the Earth and is of a size large enough to cause significant regional damage in the event of impact.”
Asteroid 2015 TB145 will fly by Earth and get as close as 25 million miles, which is far, but not that far in space terms. What you should be frightened by is that this “death comet” looks like a human skull.