Asteroid 2015 TB145 first cruised by our planet in 2015, but the creepy space rock is headed back towards us for another visit, and scientists are keeping a very close eye on it.

At the moment, astronomers forecast that its next flyby will occur in November of 2018, and they’re eager to learn more about the peculiar visitor.

During its most recent pass, radar images captured by the National Science Foundation’s Arecibo Observatory revealed the asteroid’s skull-like appearance.

As for its origins, it’s thought that the asteroid might actually be an extremely old comet which has since run dry of its icy shell, leaving just a battered hunk of rock behind.

Astronomers were able to observe the object in impressive detail in 2015, but it seems as though they’ll need to wait until closer to the end of the century before getting another good look at it.