I Built a Real-Time Space Debris Tracker in a Single HTML File

The author built Nano Debris, a fully self-contained space debris monitoring dashboard in a single HTML file using vanilla JavaScript and one CDN library. The project pulls real TLE (Two-Line Element) data and uses the SGP4 orbital propagation model to calculate real-time positions of over 27,000 tracked objects in orbit. The article explains how TLEs encode orbital parameters and how SGP4 accounts for perturbations like Earth's oblateness, atmospheric drag, and solar radiation pressure.