Double flyby of International Space Station and Space Shuttle Discovery (STS-133). I used three separate cameras to take these photos.
1. 65-second exposure of ISS and STS-133. The lower trail is STS-133, flying 13.5 seconds ahead of the ISS. (Canon A570, ISO 100)
2. ISS (left) and STS-133 (right)
(plus animated GIF of 14 frames here: http://tix.rmsc.org/astro/img_4627.gif)
Photo details: Canon A570, 2.5s exposures
3. Manually tracked using Celestron CPC-800
(afocal, 1/500s exposure, Canon SD750)