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I'm in a heavily light polluted city (Phoenix) and even with all the air and light pollution, can still see satellites every moment past 2AM to the east. At least this time of year.

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That's simply impossible. You must be seeing something else. They aren't that bright.

Its very obvious once you know what to look for, they are identical to the simulation at the top of the page below:

https://en.wikipedia.org/wiki/Satellite_flare

Evenly spaced, every 20-30 seconds. Very, very bright at peak reflectivity, with easing in / out. I have no idea what kind of satellite it is though.

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