That's only the second capture I have seen, the first had a barely discernable shape, the detail there is quite good. I must have a go with the LX, theoretically it is supposed to track the ISS if the current orbital elements data is downloaded from meade.
Phil
The trick to tracking with the LX-90 is setting the initial position for the scope to pick up the ISS as it rises above the horizon, at a point where you can easily see it Through the eyepiece) before you hit the enter key on the Autostar to begin tracking.