Four hundred kilometres up and moving at roughly 28,000 km/h, the ISS laps the planet every 92 minutes. The dot below is live, the dashed line is the orbit it is tracing this lap, and the glow is the patch of Earth that can see it.
connecting…
altitude…
speed…
the station is in…
distance from youtap the button
The glow circle is the station's footprint: stand anywhere inside it and the ISS is above your horizon. Seeing it with your own eyes needs three things at once: you in darkness, the station in sunlight, and it inside your patch of sky. Dawn and dusk are the magic windows.