Use Stellarium, not SatTrack.

1. Start Stellarium.
2. [F6] Ensure location is correct.
3. [Ctrl+Z] Ensure Satellite Hints are displayed.
4. [F2] Open Configuration Window.
5. Plugins ⇒ Satellites ⇒ configure
6. Settings tab ⇒ Updates ⇒ Update now
7. Settings tab ⇒ Orbit line ⇒ turn off
8. Settings tab ⇒ Realistic mode ⇒ turn on
9. Iridium flares tab ⇒ Predict Iridium flares
10. Select whatever one you want to track.

Use Heavens-Above for more detailed info on the Iridium Flare.

• 7 Oak Grove