Hi,
I'm sorry to say that these images cannot be registered with our StarAlignment tool. With default parameters, our star detection routine fails because it finds more than 25,000 false stars on each image. This is because the images have very high noise levels. I can work around this by adjusting star detection parameters, but then the problem is that the images are out-of-focus. Our star detection routine rejects most of the stars because they are 'concave' (brighter in their edges than in their cores).