What's following the International Space Station?

Sky watchers are reporting a 'mysterious satellite' following the International Space Station (ISS). It trails the ISS by about one minute, relatively faint, but definitely there, says a report in today's Spaceweather.com.

Mystery solved:
The follower is Progress 33, a Russian supply ship.

On July 12th, it will come within meters of the space station to test a new automated docking system.

Check the Simple Satellite Tracker for flyby times and get two spaceships for the price of one: http://spaceweather.com/flybys