Sky chart
The pass drawn across your horizon, with the elevation threshold and the direction to face.
Live · free · no account
Know the second it crosses your sky.
See when the ISS and thousands of other satellites pass over you tonight, where to look and for how long, and what has just separated in orbit.
Next pass · ISS (ZARYA) over LyonCOMPUTING
T−––:––:––
- Rise
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- Peak
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- Set
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- Duration
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Computed live as the page opens, from the latest orbital elements.
The ISS over your city: Paris, London, New York, Montreal, Brussels and 45 more.
Separations · updated nightly
Just separated in orbit
Satellites releasing satellites, deployers emptying, bodies breaking apart. Each event says when the released object passes over you.
- Oct 12, 2026, 15:00to the minute · uncertainION dispenserreleasedFlock 4j-5Release
- Oct 12, 2026, 08:30to the minute · uncertainION dispenserreleasedFlock 4j-4Release
- Oct 11, 2026, 07:00to the minute · uncertainION dispenserreleasedFlock 4j-3Release
- Oct 10, 2026, 08:00to the minute · uncertainION dispenserreleasedFlock 4j-2Release
- Oct 9, 2026, 09:30to the minute · uncertainION dispenserreleasedFlock 4j-1Release
One pass, read four ways.
Each view answers a different question, and the pass list is always the text equivalent of the globe and the sky chart.
Computed with Orekit from public orbital elements, and checked against Skyfield to within a hundredth of a degree. How it is computed · API guide
Globe
Ground track coloured by sunlight on the satellite, the visibility circle and the imaging swath.
Elevation profile
Elevation and range over time, with the Doppler shift when you give a downlink frequency.
Pass list
Every pass in the window as a table, exportable to CSV and to your calendar as .ics.
Next favourable window · 7 days
Compare up to five satellites.
Enter NORAD numbers or add satellites by name; the observer and threshold are the ones of the console above. Potential visibility means a sunlit satellite above a dark observer. Weather is not modelled, and brightness is estimated for the ISS only.
Times delimit favourable samples, with 10 s resolution; a single sample is not a measured duration.
The earliest favourable window of each satellite appears here, soonest first.
Separation data: GCAT, Jonathan C. McDowell, planet4589.org — CC BY 4.0.