Satellites overhead,estimated every second

CelesTrak publishes general perturbations element sets for each satellite: a snapshot of its orbit at one moment, the epoch. SGP4, the standard model those elements are made for, projects the orbit forward to now. POLARIS does that once a second in your browser for every satellite you have switched on.

The further from the epoch, the larger the error, typically a kilometre or so per day for low orbits, more for satellites that manoeuvre, like the ISS raising its orbit. Each satellite’s panel on the globe shows its epoch so you can judge.

Elements fetched 25 Oct 2026, 19:58 UTC, and refreshed no more than every two hours, as CelesTrak asks.

Crewed stations and the modules and vehicles docked to them.

The roughly 100 satellites most easily seen with the naked eye.

Meteorological satellites in low and geostationary orbits.

Operational GPS navigation satellites in medium Earth orbit.

Earth and space science missions.