
- Asteroid 2013 MD8 is expected to skim past Earth on Wednesday, NASA said
- The space rock has a diameter of nearly 280ft, which rivals the size of Big Ben
- It will fly by our planet at about 13 lunar distances, or just over 3 million miles
The asteroid, dubbed 2013 MD8, is expected to skim past Earth at just over 3 million miles away, or about 13 times the distance between Earth and the moon, at 12:55pm (ET) on Tuesday.

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