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  • Also not a scientist but presumably it's easier to track the precise location of something like that than accurately determine its size.

    If they where something in space has been, they know where it's going with very high accuracy.

  • Who knows - just seems odd to say no chance on predicting a trajectory when the size could be over 100% bigger than the estimate.

    Would be cool to see it go past though!

  • The Chelyabinsk airburst occurred on the same day as a large asteroid flypast. Although apparently unrelated

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