Oval shape craft seen in cloudbank tilting back and forth.

I live about 10 miles from the Wayne County Airport and have a picture window facing southwest. This window is located in my upstairs den. My house is located along a flight path, so I often see planes landing and taking off. I often track them with binoculars and watch the spectacular sunsets and military jets that are routinely streaking across the sky. My kids and I were on our way to dinner so I took a quick look with my binoculars out the window at a cloud bank. That’s when I saw an oval/egg shaped object tipping back and forth but going in a straight line. It was a dull brown in color and the sun was behind it. The strange thing is that when I lowered my binoculars in disbelief; the craft was not visible to the naked eye. But when I raised them it was visible again and still going along the same trajectory which was west to east, I believe. I watched it until it went out of sight from my point of view. It was solid and had to be huge. The way it appeared in my view was as clear and solid as planes at the height and distance have appeared to me. A military jet followed roughly along the same path but above it 3-5 minutes later.  I’ve always believed in UFOs but this is my first sighting. I personally believe they are spiritual in nature but I digress.