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Sep 21, 2019 at 14:37 vote accept Jason P Sallinger
Sep 21, 2019 at 4:40 comment added Adrian Howard @Ben51: en.wikipedia.org/wiki/2019_OK#Potential_impact_effects and youtube.com/watch?v=fPDBpThe8Ns at about 1:40
Sep 21, 2019 at 3:42 comment added Ben51 Where do you get 30 times from? Seems to me, assuming a mass of 10^9 kg, it would be more like 10000 times.
Sep 21, 2019 at 1:26 history answered Adrian Howard CC BY-SA 4.0