I saw one with my fam in the early 80's (three witnesses), on a remote forested highway, definitely man-made. We got out and were looking at it from 40-80 yards away, for a few minutes, it just hovered there. Part of it was spinning slowly. Kinda wobbly while hovering, needed an adjustment I guess. Slow wobble. At night but very visible (starry night). It was dark colored.
We drove off and left it there… I wanted to stay. lol
Pic related. Not identical but close, same series for sure. Bottom section may have been different.