If you've ever stared up on a clear night and noticed a steady, non-blinking dot drifting across the stars, you've spotted a satellite. With more than 8,000 active spacecraft in orbit, the question isn't whether one's overhead — it's which one.
Step 1: Check Your Local Pass Predictions
Open the OrbitalIQ live tracker or a tool like Heavens-Above. Both compute pass predictions from your location — telling you exactly when and where to look.
Step 2: Identify by Behavior
- Brightest, slow, often visible at dawn/dusk — almost certainly the ISS.
- String of dots in single file — a freshly launched Starlink train.
- Brief bright flash, then gone — sun glint off a flat satellite panel (Iridium-class).
- Two dots moving together — usually rocket body and payload after a recent launch.
Step 3: Cross-Check With the Tracker
Note the time and direction (e.g. "WSW to NE at 21:42 local"). Plug that into the live tracker — only one or two satellites will match.
Cool Things to Spot
- ISS pass with a docked Crew Dragon ahead of it.
- Hubble Space Telescope (similar brightness to a medium star).
- Chinese Tiangong space station — second-brightest crewed object.
Why So Many?
Mega-constellations have transformed the sky in five years. Read our Starlink guide and the GPS history article to understand how we got here.