I got the two pictures backwards from what I was saying earlier. The lower picture is the firs one that Whopper posted. In that one, the object is out by the wingtip, and appears to be about as long as the wingtip is wide, which on a 737 is about 2 -3 feet.
In the other shot, it's much closer to the window. Just to give you an idea, that pointy thing that it's over is called a canoe, and they only stick out about 1 foot. If it was a real object, it shrunk.
Also in addition to what I said before about the speed of the aircraft, the object as it was closer to the aircraft, is in the area right behind the engine. The non pointed canoe is the back of the engine pylon as you can see in the picture I've posted below. Anything in that area would have gone flying much faster than 500 MPH.
I'm not going to say 100% that it's a photoshop job, but if not it's definitely something on your lens.
