No telescope. No expertise required.
Just open your phone and see which satellites are passing over you tonight.
Features
SatFennek calculates the next visible pass of the ISS from your current location — showing exact time, direction, and duration. "Appearing NNE, max elevation 13°, visible for 3m 30s."
A circular overhead map shows exactly which direction to look and traces the satellite's full path from appearance to disappearance — at a glance.
During a pass, point your phone at the sky and an AR marker guides you to the satellite in real time. No guessing which dot is moving. (Mobile only)
Protect your night vision with a red screen filter — essential for dark-adapted eyes during serious observation. (Available to registered users)
Record whether you saw it or not with a single tap. Your data contributes to a growing community observation network.
Track the ISS, Tiangong, Hubble, Starlink, Amazon Kuiper, OneWeb, Planet Labs, and more — all in one place.
Scan a QR code at an event and start using it instantly. Add to your home screen for an app-like experience with bottom-nav, no install required. (PWA)
Get a nightly alert around 6 PM with that evening's pass info — combined with local weather so you only hear from us when the sky is clear. (After adding to home screen)
SGP4 orbital calculations run in Rust/Wasm directly in your browser — fast, accurate, and no server round-trip required.
How it works
Who it's for
Never miss an ISS pass again. Check the sky dome to know exactly which direction to point your binoculars before you head outside.
Track the ISS live during science class. Students log their own observations, turning a lesson into a hands-on experience.
Perfect for space events and planetariums. Share a QR code and every attendee has a live satellite tracker in their pocket.
Plan your shots with precise pass timing. Know the max elevation, duration, and direction before you set up your gear.
Community
Each "saw it" or "missed it" tap adds to a growing dataset of real-world satellite sightings from observers around the world.
No sign-up. No install.
Open your browser and your pocket satellite tracker is ready.