Morning of 11/26/2014, I saw this EXACT same phenomenon near either Merak or Dubhe. I let my dogs out, looked up thinking 'why is there an extra star in the Big Dipper?'. There is no prominent star there. It then disappeared over 3-5 seconds. I suspect a geosynchronous satellite that changed direction just enough to occlude reflection (or as others have mentioned it is more likely occlusion by a planet or even the horizon, although probably not Jupiter in this case since Jupiter was also visible in Leo where it would not have occluded a satellite in this area). But it was a very interesting sight, very UFO-ish looking. I haven't verified against any satellite trackers but I'm pretty sure that's what it was.