I agree, I only learned it recently but there are a few very motivated individuals that track satellites and share a lot of the information. I learned about it during the whole Zuma fiasco, from the SatTrackCam blog [0]. I would definitely recommend reading it if this sort of thing interests you, it awesome to see how these guys do the tracking and the sheer amount of information they infer. The Zuma ones are great, along with the ones about the ISS and the satellite got close to it.