An abundance of trails

While experimenting with some time lapse sequences this single unguided 15 second exposure picked up no less than 7 trails from satellites or space junk. This is with a 55mm lens on an APS-C sensor so covers a fair area of sky. Evidence though of the large amount of man-made hardware that can find its way onto our astro images. Details: 55mm @ F1.8 Canon 550D 15 seconds exposure. No filters. Processed with FIV.