Celestial Phenomena : ISS and Saturn

[Calculus]

I just added a new image to my gallery.
I've never heard of a real shot of this: a conjunction of ISS and Saturn.
I don't think it is rare even but though very difficult to catch. On my image, the scene takes place in less than a quarter of a second!
Have a look:

http://ennui.shatters.net/gallery/view_photo.php?set_albumName=Calculus&id=ISS_Saturn_conjunction