Space & Astronomy Toolkit

Free utilities for satellite tracking, pass prediction, and space observation.

ISS Tracker

Monitor the International Space Station in real-time. View current latitude, longitude, altitude, velocity, and regional position. Project upcoming pass times over your location.

Open Tracker

Satellite Pass Predictor

Predict upcoming visible passes for amateur radio satellites, weather satellites, science missions, and space stations. See rise, culmination, and set times in your local timezone.

Open Predictor