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.
So, 165 km is about the lowest reasonable orbit. There are satellites orbiting at many altitudes up to 35,600 km, which is the height for geosynchronous orbits) and there have been satellites orbiting much higher (either for some scientific purpose or some accident).