I defy anyone to accurately gauge size, altitude and speed of any object in the sky. Size is relative to a known.
An object 5 feet long subtends a different arc size depending on the distance away from the viewer.\
MUFON set up a triangular fix...using exact spots where 3 different groups were viewing the UFO. That, together with the radar reports indicate that it was a gigantic object.
Another witness said that he was standing under it on his ranch and the bottom of the object “filled the entire sky”....and suddenly took off in a blink of his eye at a 45 degree angle....with no sound or wind distubance.
He described the bottom as having no rivets and concave divots every forty feet or so.
That's according to your physical laws, Earthman.