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Your camera when fully zoomed in has a FOV of 18.7 x 14.0 degrees which is recorded by 2048x1536 pixels. So assuming an ideal lens, each pixel covers 32.9 arcseconds.
Lets say the ISS was directly overhead, so its distance was 355 km. Its largest dimension is 73 m. So its angular size is 43.0 arc seconds.
Therefore, with ISS directly overhead, ideal lens and ideal atmosphere, the largest dimension of the ISS is 1.3 pixels in size.
The object in your image seems to be a few times larger than this. I can only suggest that this size may be some sort of artifact?
Last edited by MiG; 09-08-2005 at 05:15 AM.
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