Asteroids headed for Earth are always scary. So get to know them a little! You can use the Impact: Earth! calculator to see what kind of damage an asteroid will cause. It's totally not as scary when you crunch the numbers.
The Impact: Earth! calculator was developed by a Purdue University research team and it basically lets anyone calculate the damage an asteroid will cause when it hits Earth. You'll have to fill in the basic info of your presumed asteroid like how big it is, how dense it is, the angle of entry and the location of its hit. But after that's inputted, the calculator will spit back the dire consequences: like the size of the crater, the seismic effects, the energy of the ejecta, and other scary results of an asteroid.