Now, this is the other asteroid, 2012 DA14, that came uncomfortably close to hitting us. And how big is 2012 DA14? Here are some notes of interest.
- Discovered on February 23, 2012.
- It is only 150 foot long. That's what? 1/2 a football field? it also weighed about 190,000 metric tons.
- It was only 17.2K miles from our surface. It came well within orbits of geosynchronous communication satellites.
To be sure, it's an event that we really need to pay attention to but it was upstaged by the Russian explosion. And one more thing, the two events are not related.