With thousands of satellites orbiting Earth right now, anyone with an internet connection can follow them live. Finding the best free satellite tracker online does not have to be complicated — you do not need specialist software, expensive subscriptions, or technical expertise. All you need is a browser and the right tool.
SatFleet Live is a free satellite tracking website that puts more than 16,000 active satellites on an interactive 3D map, updated in real time — and it is also the only free tracker that goes beyond Earth orbit entirely, with live maps of the Moon, Mars, and the whole solar system. In this article, we explain what makes a great satellite tracker, why SatFleet Live stands out, and how to get started in under two minutes.
Try it live: the ISS on SatFleet Live's 3D globe. Open the full tracker to follow thousands of satellites.
Why Free Satellite Trackers Are Useful
Satellites touch almost every aspect of modern life — yet most people have no idea how many are flying overhead at any given moment. A good real-time satellite tracker bridges that gap, making the invisible infrastructure of space tangible and accessible to everyone.
Here are some of the most common reasons people choose to track satellites online:
Astronomy & Stargazing
Know exactly when the ISS or a Starlink train will cross your sky so you can spot it with the naked eye or photograph it.
Education & Research
Teachers, students, and researchers use satellite trackers to visualise orbital mechanics and space infrastructure in real time.
Amateur Radio (HAM)
Ham radio operators track satellites like AMSAT to predict optimal contact windows and antenna pointing angles.
Weather & Earth Observation
Follow NOAA, GOES, and Copernicus satellites to understand where live climate and imaging data comes from.
Beyond these use cases, satellite tracking is simply fascinating. Watching hundreds of dots glide across a live world map — each one a real object moving at 28,000 km/h — offers a uniquely humbling perspective on our technological civilisation.
Features of SatFleetLive
Not all satellite trackers are equal. Some require account registration, others are cluttered with ads, and many only show a handful of well-known satellites. SatFleet Live was built to be the cleanest and most complete free satellite tracking website available — no sign-up required, no distractions.
What SatFleet Live offers
- 🛰️ 16,000+ satellites tracked simultaneously — GPS, ISS, Starlink, military, weather, geodetic, and more
- ⚡ Positions updated every second using SGP4 orbital mechanics and fresh TLE data from CelesTrak
- 🎨 Colour-coded categories so you instantly know what type of satellite you are looking at
- 🔭 Visibility filter — shows only satellites above your horizon and illuminated by the Sun right now
- 📍 Next Passes — calculates when any satellite will fly over your exact location, with azimuth and elevation
- 🔍 Search by name or NORAD ID to jump instantly to any specific satellite on the map
- 🌌 Moon, Mars & Deep Space maps — the only free tracker that goes beyond Earth orbit
- 📱 Fully mobile-responsive, with a free Android app available on Google Play
The live map, satellite search, Moon, Mars, and Deep Space trackers, and AR Sky View are all free with zero registration. An optional SatFleet Premium subscription unlocks extended pass forecasts and advanced filters for those who want more — but it is entirely optional, and it directly supports the independent developer who builds and maintains the app.
How SatFleet Live compares to other trackers
There are several popular options to track satellites online. Here is a straightforward feature comparison:
| Tracker | Free | No login | 16,000+ sats | Next Passes | Beyond Earth |
|---|---|---|---|---|---|
| SatFleet Live | ✔ | ✔ | ✔ | ✔ | ✔ Moon, Mars, Deep Space |
| Heavens-Above | ✔ | ✔ | ✘ | ✔ | ✘ |
| N2YO | ✔ | ✔ | ✘ | ✔ | ✘ |
| Stellarium Web | ✔ | ✔ | ✘ | ✘ | Sky view only |
| Space-Track.org | ✔ | Login req. | ✔ | ✘ | ✘ |
Beyond Satellites: Moon, Mars & Deep Space
Most "satellite tracker" websites stop at Earth orbit. SatFleet Live does not — and this is the single biggest thing that separates it from every tracker in the comparison table above.
Moon Tracker
Every historic landing site from Apollo to Chang'e, plus live lunar orbiters, on a real 3D lunar globe. Explore the Moon →
Mars Tracker
Curiosity and Perseverance tracked live with their real driving trails, plus historic landers and active orbiters. Explore Mars →
Deep Space
The real, live position of every planet, several dwarf planets, major moons, and interplanetary spacecraft like Voyager 1 and the James Webb Space Telescope. Explore Deep Space →
All of this uses the same principle as the Earth satellite map: real, verified data — in this case from NASA/JPL's Horizons ephemeris system — updated automatically, never a static illustration.
How to Track Satellites Online for Free
Getting started with SatFleet Live takes less than two minutes. Here is exactly what to do:
- Visit satfleetlive.com Open satfleetlive.com in any modern browser on desktop or mobile. The map loads immediately — no installation or account required.
- Allow location access For the best experience, allow the browser to share your location when prompted. This powers the visibility filter and Next Passes feature. You can decline and the map still works fully.
- Browse the live map Each coloured dot is a real satellite moving in real time. Blue = GPS, white = space stations, green = Starlink, red = military, yellow = weather, and more. Zoom in to explore individual orbits.
- Filter by category Use the filter buttons at the top to show or hide satellite groups. Combine multiple filters simultaneously — for example, GPS + weather to compare different orbit altitudes side by side.
- Click any satellite for details Selecting a dot shows its name, altitude, velocity, latitude, and longitude. The predicted orbit path is drawn on the map automatically.
- Activate "Only Visible" mode Press the Only Visible filter to narrow the map to satellites currently above your horizon and lit by sunlight — the ones you could actually spot tonight.
- Check Next Passes for planning Head to Next Passes to get a timetable of upcoming passes over your location — with exact times, maximum elevation, and compass direction.
On smartphones, tap the 📊 floating button at the bottom-right of the screen to open the control panel with all filters, visibility settings, and the satellite legend. The map supports standard pinch and swipe gestures throughout.
Tips for Accurate Satellite Tracking
To get the most out of any real-time satellite tracker, keep these best practices in mind:
Keep TLE data fresh
Satellite positions are calculated from TLE (Two-Line Element) orbital data. This data degrades over time as satellites experience atmospheric drag and perform manoeuvres. SatFleet Live refreshes its TLE data every 48 hours from CelesTrak / NORAD, which provides excellent accuracy for the vast majority of satellites.
Target twilight windows for visual observations
The ideal window to spot satellites with the naked eye is during civil or nautical twilight — roughly 30 to 90 minutes after sunset or before sunrise. The sky is dark enough to see satellites clearly, but the Sun is still below the horizon illuminating them from underneath. SatFleet Live's visibility filter automatically accounts for this condition.
Set a minimum elevation of 20° or higher
When filtering for visible satellites, raise the minimum elevation slider to at least 20°. Satellites near the horizon pass through more atmosphere, reducing their apparent brightness. Higher elevation passes are brighter, slower-moving, and far easier to observe.
Use the NORAD ID to find specific satellites
Every tracked satellite has a unique five-digit NORAD catalogue number. Typing it directly into the SatFleet Live search bar takes you straight to that satellite on the map. For reference, the ISS is NORAD ID 25544 and the Hubble Space Telescope is 20580.
Combine the live map with Next Passes
The live map shows where a satellite is right now. The Next Passes tool tells you when it will be visible from your location next — with exact times, maximum elevation, and direction. Use both together for the best observation planning experience.