Alerts

Never miss a pass

Set your coordinates and we'll ping you before the bright ones come over — a few minutes ahead, so you can get outside and get your eyes dark-adapted in time.

What you can watch for

iss       brightest, most frequent
starlink  the trains, when they're new
iridium   the old flares (a few still flash)
launches  engine cutoffs and stage separations

Quiet by default

One ping per pass, nothing else. Orbit doesn't need to interrupt you to be useful.