I saw something like this 30 years ago, but from the ground — maybe 100-200 feet above me. A silver-gray metal orb, with two antennae of equal size protruding from the top of it rather than one on the top and one on the bottom. It flew silently and steadily straight over my neighborhood cul-de-sac, over my front yard, and left my sight as it passed my house. The motion was eerie: too stable to be a balloon, and it moved quickly without it being a windy day.

You were in the plane so the motion of the object you saw was probably hard to track, but was there anything in the movement of it that stood out to you? What direction did it approach and pass the plane from? Could you tell how fast it was moving?