Satellite Pass Predictor
When ISS and Hubble pass over your location — computed client-side, no account needed.
Your Location
City lookup uses Nominatim (OpenStreetMap). Lat/lon inputs accept any coordinates. Your location is computed locally — never sent to a server.
Upcoming Passes
Next 14 days — computed from current TLE data. Max elevation > 10° required for visibility.
No visible passes in the next 14 days for this location and satellite combination. This can happen at extreme latitudes or when the satellite passes at high southern declination.
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| Date & Time | Satellite | Brightness | Direction | Max El | Duration |
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Brightness values are approximate. Actual visibility depends on atmospheric conditions, sky darkness, and your local light pollution. ISS magnitude range: -4 to +2. Hubble magnitude range: +6 to +3.
Orbital elements from CelesTrak (public domain, updated frequently). TLE data cached in your browser for offline use. Computation via satellite.js (MIT).