This sounds like apparent retrograde motion (https://en.m.wikipedia.org/wiki/Apparent_retrograde_motion https://en.m.wikipedia.org/wiki/Apparent_retrograde_moti

This sounds like apparent retrograde motion (https://en.m.wikipedia.org/wiki/Apparent_retrograde_motion https://en.m.wikipedia.org/wiki/Apparent_retrograde_motion). Not sure how's possible to observe this effect in real time though