Satellite tracker in your browser
Hold up your phone and watch satellites move across the sky in real time, from the International Space Station to Hubble and Starlink. There’s nothing to install: it runs in Safari or Chrome and works out where every satellite is from where you stand.
Free. Works in Safari and Chrome, nothing to install.
Working out your sky…
How to spot a satellite
Satellites shine by reflecting sunlight. The best time to look is the first couple of hours after sunset or before sunrise, when your sky is dark but the satellite overhead is still in sunlight.
They look like steady points of light gliding across the sky in a few minutes. Planes blink; satellites don’t. Some fade out partway across as they slip into Earth’s shadow.
What you can track
- The International Space Station and China’s Tiangong station
- The Hubble Space Telescope
- About 100 of the brightest satellites and old rocket stages
- Starlink satellites, which you can turn on in Settings
How it works
Orbit data comes from CelesTrak and is refreshed every few hours. Your phone uses it to work out each satellite’s position continuously, so the dots on your screen line up with the real sky. Satellites in sunlight are drawn brighter than ones in Earth’s shadow.
Share a satellite
Tap a satellite, then Share. The link opens with that satellite selected, an arrow pointing to it from the other person’s location, and its next passes. Send the ISS before a good pass and everyone can watch it together.
Questions
Can I track satellites without an app?
Yes. The tracker runs in your phone’s browser, using orbit data from CelesTrak.
Why can’t I see a satellite the tracker shows?
Satellites are only visible when they’re in sunlight and your sky is dark, and many are too faint to see from a city. Each satellite’s pass list marks which passes you can actually see.
How accurate is it?
Accurate enough to point you at the right spot. Orbit data is refreshed every few hours, and the space stations sometimes fire their engines, which can shift pass times slightly until the next update.
Does it show Starlink?
Yes. Turn on Starlink in Settings. There are thousands of them, so it downloads more data.