The B612 Foundation points to an illustration by space artist Michael Carroll that gets across the scale of the meteoroid that blew up over Chelyabinsk, Russia on February 15th and the asteroid 2012 DA14 that passed near earth later that same day: So how big are these NEOs anyway? – B612 Foundation

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Asteroid 2012 DA14 (on left) vs the Chelyabinsk meteoroid vs a US football stadium.
Illustration by Michael Carroll.