You are fooling yourself (as I was for a while). Go look at FreedomCalls' #126 on this thread -- and then re-read point 2 of my #108 here. That ain't any a$$-on shuttle you're looking at -- it is a camera-aperture distortion artifact of a bright point light source!
Which just happens to look exactly like a Shuttle, right down to the OMS pods. Riiiighht.