Unexpected Minor Planet to Visit the Inner Solar System Soon

posted by Jason Kottke   Jun 21, 2021

Well, this is cool: a recently discovered minor planet estimated to be between 62 and 230 miles across is currently journeying through our solar system and sometime in 2031 will be almost as close to the Sun as Saturn.

And it turns out, astronomers are about to witness the closest pass of this incredible round trip. Currently, 2014 UN271 is about 22 Astronomical Units (AU) from the Sun (for reference, Earth is 1 AU from the Sun). That means it’s already closer than Neptune, at 29.7 AU. And it’s not stopping there — it’s already traveled 7 AU in the last seven years, and at its closest in 2031, it’s expected to pass within 10.9 AU of the Sun, almost reaching the orbit of Saturn.

Before then, it’s expected to develop the characteristic coma and tail of a comet, as icy material on its surface vaporizes from the heat of the Sun. This close pass would give astronomers an unprecedented close look at Oort cloud objects.

C’mon NASA, let’s a get a probe fired up and visit this very unusual object!