It came from the S.E. over the railroad tracks and over the church

Was taking my dog for a late night walk behind the church in my subdivision. I felt pressure and rumbling and my 120 lb American Bulldog got between my legs. It came over the trees about 100 ft over the Maple's and it was pitch black no lights at all and it took almost a full minute to pass over. I had a high powered lumen flashlight and as it passed me I shined the beam at the back of the object and nothing was there except what looked like heat waves. Then it was gone .