We will have a close flyby of 2024MK on Saturday that was first seen just a few days ago.

After the one exploded over Russia about 10 years ago we have all been reminded that there are lots of rocks out there that can 'visit' us at any time indeed probably most of us have seen small ones burn up in the atmosphere

2024MK is big enough it would not burn up but would create major damage on a region it hit if it was just a little closer.

https://www.cbc.ca/news/science/asteroid-2024mk-1.7247336?cmp=newsletter_CBC%20News%20Morning%20Brief_11978_1618260

Earth is surrounded by rocky bodies and bits of debris from when the solar system formed roughly 4.5 billion years ago. On Saturday, one of those leftover rocks will whiz past Earth.

The asteroid is called 2024 MK and, at its closest, it will pass roughly 290,000 km from Earth. While we have plenty of small asteroids that are scattered within Earth's orbit, this one is sizeable, ranging anywhere from 120 metres to 260 metres in diameter. 

But there's another interesting — and somewhat disquieting — fact about this large asteroid. 

"Maybe the big take-home point on this one is it's a pretty big object and it was only found 10 or 12 days before closest approach," said Peter Brown, Canada Research Chair in meteor astronomy and a professor at Western University in London, Ont. "The last time we had an object this big or bigger pass this close to Earth was ... in 2001."

"So unlike most asteroid stories, this actually is noteworthy in the sense of … this is pretty big, pretty close."