There are thousands of satellites overhead right now. SDA Tracker shows you where they are — all of them, at once, moving in real time on a 3D Earth you can spin, zoom, and search.
It pulls the public catalog of orbital data that governments and observers maintain, works out where each object is at this exact moment, and draws the whole picture in your browser. No install, no account. You can speed time up to 20,000× and watch a day of orbital traffic go by in a few seconds.
What It Does
- Tracks up to the full active catalog — roughly 11,000 objects — simultaneously
- Sorts satellites by orbit type (low, medium, geostationary, highly elliptical, decaying) and color-codes them
- Shows a live day/night line, and dims satellites that are in Earth's shadow
- Draws each satellite's full orbit path and its ground track across the map
- Click any object for its altitude, speed, position over the ground, and orbital details
- Search the catalog, filter it, and lock the camera onto whatever you're following
How It's Built
One HTML file. No server, no database, no build step — everything runs on your machine when the page loads. The entire catalog draws in a single pass so it stays smooth even with thousands of objects on screen, and the Earth's surface and coastlines are generated in code rather than loaded as images.
A Note on Accuracy
This runs on public orbital data, which is deliberately approximate — positions are good to within a few kilometers when fresh, and drift further as the data ages. It's built for understanding and visualizing what's in orbit, not for operational collision avoidance.