The anomaly in the upper right corner is simply a reflection of the tip of the space station. If you brighten the original just a little bit, you can see the panel which extends toward the upper right at an angle.
Here, this might help:
I agree Boon. It's the top of the ISS. I didn't see it at first.
In fact you don't need to brighten it; look the top of the ISS; it's the same shape.
Edited by zoser, 03 November 2012 - 07:03 PM.