Can artificial earth satellites be seen by naked eyes on the earth?

Satellites are visible to the naked eye on the earth, just like stars, but they can move.

To observe artificial satellites, we must first distinguish the brightness of satellites from the lights of airplanes.

The white light of most aircraft flashes regularly, and there are often green or red wing lights. If you use a telescope, you can clearly identify the plane and even see the gas emitted by the engine of the plane. In addition, the naked eye may even see the light reflected by the space shuttle or rocket, but this is rare. More often, the bright spot that people see walking quickly between constellations is artificial satellites. Satellites that are easily visible to the naked eye are usually as big as a truck. They move at a speed of 28,000 kilometers per hour at a height of 300 kilometers to 500 kilometers and can cross the sky in two or three minutes. Due to the rapid flight, the relative position between the satellite and human beings changes, the angle of its reflecting surface changes, and the brightness may increase sharply within a few seconds.