Geostationary satellite

I was photographing the Orion Nebula and in some of the photos (38 frames), an object was captured. (It's in the center of the frame in the photo.) Each frame was taken with a 30-second exposure. 38 frames equals 19 minutes. The object appears to be moving too slowly for a satellite. I thought it might be an asteroid or something... Turns out it was a geostationary satellite.