It's aphelion is located 3.95 x 1011 meters away from the sun, whereas its perihelion is located only 2.09 x 1010meters away. It's semimajor axis is approximately 1.9 x 1011meters in length. In addition, it's orbital velocity is, on average, 19.9 km per second. If 3200 Phaethon hit earth, the size of the crater it might create will be _____