U.F.O.? or B.A.L.L.O.O.N.?

The second photo is showing the image enlarged 200%, it did move across the sky, BUT it did move in a straight line, perhaps balloon like? It did disappear in the second I took my eyes off it after snapping several pics, disappeared ufo like? or popped balloon like? Leave a comment and weigh in, U.F.O.? or B.A.L.L.O.O.N.?

Seen On September 2, around 7:10 pm.