Pass predictions
When the ISS and bright sats fly over your roof.
Your sky, on a schedule
Every bright satellite crosses your horizon on a timetable. Pass predictions turn that timetable into a reminder: look up, at 21:14, toward the southwest, for about four minutes.
How we predict
input your lat / lon / altitude source fresh TLE, re-fit every 6h output time, azimuth, elevation, magnitude sort brightest first, visible only
The one that matters
The ISS is the brightest thing in your sky after the moon. On a good pass it's magnitude -4 — brighter than any star, moving fast enough to notice.