Track The Sky — Real-Time 3D Satellite Tracker
Track over 9,000 satellites in real time on an interactive 3D globe. Monitor space stations, Starlink, GPS, weather satellites, and more with live orbital data updated every two hours from CelesTrak.
Satellite Categories
- Space Stations — ISS, CSS, and related objects (approximately 30 satellites)
- Starlink — SpaceX Starlink constellation (approximately 6,000 satellites)
- OneWeb — OneWeb broadband constellation (approximately 600 satellites)
- GPS — US GPS operational satellites (approximately 31 satellites)
- Galileo — European navigation satellites (approximately 28 satellites)
- GLONASS — Russian navigation satellites (approximately 24 satellites)
- BeiDou — Chinese navigation satellites (approximately 50 satellites)
- Weather — Weather observation satellites (approximately 50 satellites)
- NOAA — NOAA environmental satellites (approximately 20 satellites)
- GOES — Geostationary weather satellites (approximately 10 satellites)
- Amateur Radio — Ham radio satellites (approximately 100 satellites)
- Iridium NEXT — Iridium communications constellation (approximately 75 satellites)
- Geostationary — Geostationary orbit satellites (approximately 500 satellites)
- Science — Scientific research satellites (approximately 50 satellites)
- All Active — All active satellites (~9000) (approximately 9,000 satellites)
Features
- Real-time satellite propagation using SGP4/SDP4 orbital mechanics
- Interactive 3D CesiumJS globe with Natural Earth textures
- Click any satellite to see its orbit path, ground track, altitude, and velocity
- Overhead pass predictions for your location
- Conjunction (close approach) alerts between tracked satellites
- Day/night solar illumination — see which satellites are sunlit or in shadow
- Search by satellite name or NORAD catalog number
- Time controls — pause, fast-forward at 10x, 60x, or 600x speed
- Camera follow mode to track a satellite across the globe
- Cinematic mode with bloom effects for screenshots and presentations
- Satellite footprint visualization showing ground coverage area
- Sky View polar plot showing satellites overhead your location with azimuth and elevation
- ISS Live View with real-time altitude, speed, sunlit status, and crew manifest
- Observer location support with geolocation, manual coordinates, and preset cities
- Browser push notifications for satellite pass alerts with 5-minute advance warning
- Starlink train detector identifying recently launched satellites still in orbit-raising phase
- Historical space events timeline with 15 curated milestones from 2007 to 2024
- Orbit comparison tool to compare up to 6 satellites side by side
- Discovery panel with Famous, Records, Recent, and Decaying satellite browsing tabs
- Fuzzy search spotlight with recent searches, keyboard navigation, and random satellite picker
- Reentry tracker showing decaying satellites ranked by estimated time to atmospheric re-entry
- Shareable satellite snapshot cards with downloadable branded PNG images
- Timelapse recorder capturing the CesiumJS globe as a downloadable WebM video
- Launch calendar with upcoming rocket launches, countdowns, and mission details
- Ground station network map showing 20 major tracking facilities worldwide
- Space debris and fragmentation event tracker with known collision and ASAT test data
- Naked eye visibility mode estimating visual magnitude for satellites overhead
- Multi-language support in English, Spanish, French, German, Japanese, and Chinese
Data Source
Orbital elements (TLE/OMM data) are sourced from CelesTrak, maintained by Dr. T.S. Kelso, using NORAD two-line element sets. Data is refreshed every two hours via a server-side proxy to provide the most current orbital predictions.