I've also seen it 6 times now on 3 different days.
Friend of mine is studying to become a commercial airline pilot and he could only tell me that if it were to be an airplane, it's flying illegal without navigation lights (red & green lights). The red and green lights are for other planes in the sky to know which one has to move out of the way when they cross paths.

And this object didn't have those navigation lights, hence it's either an illegal aircraft or ... i don't know.

I've searched the web for UFO reportings but none were found that matched my observation.

This is Belgian airspace i'm talking about, if ur seeing it in America, it's most likely something circling the planet constantly. I think the intervals were about 2,5 to 3 hours between each sighting.