The Neo-Babylonian Empire was a period of Mesopotamian history which began in 626 BC and ended in 539 BC. During the preceding three centuries, Babylonia had been ruled by their fellow Akkadian speakers and northern neighbours, Assyria.
In order for a satellite to successfully orbit the Earth, it must travel a horizontal distance of 8000 meters before falling a vertical distance of 5 meters. A horizontally launched projectile falls a vertical distance of 5 meters in its first second of motion.
In a circular orbit just outside the dense atmosphere, a satellite needs only 90 minutes for one full circuit, but more distant satellites move more slowly, and at a radius of 6.6 RE the period is close to 24 hours, matching the rotation period of the Earth.