Touchstone Pictures and Jerry Bruckheimer Films present in association with Valhalla Motion Pictures and Cheyenne Enterprises A Jerry Bruckheimer/Platinum Dunes production of a Michael Bay film Bruce Willis "This is the earth, at a time when the dinosaurs roamed a lush and fertile planet. But then, a piece of rock just 6 miles wide changed all that. It hit with the force of 10,000 nuclear weapons. Over a trillion tons of dirt and rock were hurled into the atmosphere, creating a suffocating blanket of dust the sun was powerless to penetrate for a thousand years. It happened before, and it will happen again. It's just a question of when." -Charlton Heston Michael Bay’s *Armageddon* (n): the final battle between the forces of good and evil -The New Testament (chapter 16, verse 16)
Yeah. Just the part with the asteroid itself alone was bad. At 1,400 kilometers across it wouldn't be so stretched out but more spherical. Also an object that size would be seen years if not decades in advance. Also most asteroids in the inner solar system would be travelling at roughly 15 kilometers per second or higher. When such a large objects hits, it releases so much heat that it turns rock into rock vapour. This rock vapour would have a temperature of over 4,000 degrees Celsius, even on the other side of the planet and last years. That alone would basically sterilise the planet, or most it.