WatchSat — Real-time Satellite Tracker
Watch 16,025 active satellites move in real time on an interactive 3D globe (catalog of 2026-09-08). Every point is a real spacecraft, propagated live in your browser from CelesTrak orbital data with the SGP4/SDP4 model and rendered over real NASA imagery.
Select any satellite to see its orbit and orbital elements, and compute the next naked-eye passes over your location — entirely on your device. Or leave orbit: the Moon, Sun and planets are placed by real ephemerides too.
Start exploring
- Track the ISS (NORAD 25544)
- ISS visible passes tonight
- Starlink train — visible tonight?
- Satellite directory — browse the full catalog
- Upcoming rocket launches
- Aurora forecast tonight
- Deep Space — Voyager 1 & 2, live
- Who’s in space right now