All the time and no they are NOT irridium flares. That is nothing more than a biggy biggy lie by the black ops thugs to "hide" craft in your mind. OH LOOK it's a satellite doing the irridum flare. So you don't see the star CRAFT.

People, the satellites are SMALL, and rarely seeable by the naked eye. In fact I never saw one. They are very high in orbit and not very big.