It is Mimas and ever since the Voyagers we know this moon also as the Deathstar (that's no moon). The fun thing is that Mimas was only photographed three years after Starwars (1977). The crater is called the Herschel-crater, after Herschel who discovered Mimas in 1789. The crater is 130 km wide, about 10km deep, the craterwalls stick out 5 km above the surrounding plains and the central peak is almost 15 km high. If this crater was on earth than it would have been about 4000 km in diameter.

Robert van der Veeke Basugasubasubasu Basugasubakuhaku Gasubakuhakuhaku!! "Better is the enemy of good enough." Dr. Mikoyan of the Mikoyan Gurevich Design Bureau.