I claim the ornamental design for the oblong kinetic sculpture, as shown and described.
FIG. 1 is a front side view of the oblong kinetic sculpture of FIG. 3 in a compressed mode (the rear side, top side and bottom side view being the same as the front side view)(the bisecting channels and ribs and other interior surfaces shown in broken lines not being part of the design).
FIG. 2 is a right side view of the oblong kinetic sculpture of FIG. 3 in the compressed mode (the left side view being the same as the right side view)(the bisecting channels and ribs and other interior surfaces shown in broken lines not being part of the design); and,
FIG. 3 is a perspective front side and top view of the oblong kinetic sculpture (the bisecting channels and ribs and other interior surfaces shown in broken lines not being part of the design).