It's hardly a secret craft - if amateur astronomers can find it, you can bet most of the world's intelligence agencies know quite a bit about it - and now that the West has total air control over all of Libya a space plane that'll pass over the area only once every couple orbits would be a pretty stupid way to do recon.

Fly a few dozen Predators or use the existing air assets already patrolling over Libya and you'll get better data.