Very bright star-like object, about the size of Venus, but much brighter, moving very fast

I was walking for exercise on long deck outside, facing a full moon to the south, behind trees. Above my right shoulder I suddenly saw a very bright "star" -- a little larger than Venus and much brighter -- shoot across the sky (north to south) and disappear behind the trees. During the few seconds it was visible, it stayed exactly the same size, shape and brightness (no flickering out, no trailing or streaking) with uniform speed and a perfectly straight path parallel to earth.
Normally I would assume it was a "shooting star" but its brightness was more like intense LED white. I have never seen a meteor display that type of white light. Also that it didn't vary, flicker, or burn out, or leave a trail. It just disappeared behind the trees. Although it was very fast, it seemed slower than a meteor. It seemed to last too long.