That’s no moon:

A small asteroid has been found circling Earth as the two objects orbit the sun together.

Scientists say it looks like the asteroid — called 2016 HO3 — has been out there for about 50 years and isn’t going away anytime soon.

“Our calculations indicate 2016 HO3 has been a stable quasi-satellite of Earth for almost a century, and it will continue to follow this pattern as Earth’s companion for centuries to come,” said Paul Chodas, manager of NASA’s Center for Near-Earth Object Studies.

It’s going to need a better name than 2016 HO3…