The ISS passes overhead 4–6 times a day and is the third-brightest object in the night sky. No equipment needed — just your eyes and a clear horizon. Here's how to predict passes, photograph the station, and catch Starlink trains.
You don't need any equipment — just your eyes, a tracker app, and a clear horizon. From a city center with terrible skies for everything else, you can watch the ISS sail directly overhead. Beyond it, there are over 10,000 active satellites you might catch: Starlink trains after fresh launches, Tiangong (China's station), spent rocket bodies, weather and military satellites, and a growing population of CubeSats.
Satellites are sunlit reflections of metal and solar panels — steady-moving "stars" that cross the sky in 1–10 minutes. The bright ones (ISS, Tiangong, Hubble) are easily naked-eye. Most are mag 3–6 (binocular targets). Geostationary satellites sit motionless above the equator at mag 9–12 — telescope targets that don't move.
Sometimes the ISS suddenly fades and vanishes mid-pass while still high in the sky. That's it entering Earth's shadow — no longer lit by the Sun, so it simply blinks out. The reverse (a satellite appearing where there was nothing) is the same thing in reverse: emerging from shadow into sunlight.
Lens: wide-angle 14–35mm. Settings: ISO 400–800, f/4–5.6, 30 s to 4 min. If the pass is longer than your camera allows, shoot back-to-back frames and stack them with StarStaX (lighten mode).
Include a foreground — a tree, building, or mountain. Start the exposure just before the pass begins; the ISS records as a bright unbroken line that dramatically outshines the star trails.
Catch the ISS silhouetted against the Moon or Sun — the transit lasts about 1 second. Use transit-finder.com to find transits within driving distance (you may need to drive 10–50 km into the narrow track).
Gear: 300mm+ lens or a telescope. For the Sun, a proper solar filter is mandatory (see the Solar Observing Guide). Pre-focus, then fire a high-fps burst (10+ fps) to cover the ~1-second pass.
Resolving the solar panels and modules requires an 8-inch+ telescope on a fast or specialized satellite-tracking mount, plus a camera at 100+ fps, stacking the best frames from the few seconds it's well-resolved. Not beginner work — but the detail achievable from amateur gear (Legault, Voltmer) is genuinely remarkable.
Completed 2022. Smaller than the ISS but increasingly visible — peak magnitude around −1, comparable to Sirius. Often passes within hours of the ISS at a similar orientation due to similar orbital parameters.
For 2–7 days after a fresh SpaceX launch (60+ satellites at once), they appear as a dramatic line of evenly-spaced bright dots — the famous "string of pearls." Predict them at findstarlink.com. Photograph like an ISS trail. They're bright enough to streak astrophotos — an unavoidable part of modern skies.
Mag 1–3 at favorable passes. Visible only from latitudes 28°N–28°S because of its low orbital inclination — north of that you may never see it. Tracking apps include it.
The original Iridium satellites famously flashed to mag −8 — brighter than Venus — as their flat antennas mirrored the Sun to a tiny ground spot. The constellation was retired by 2019; the replacements don't flare. RIP one of the great satellite experiences.
Spent rocket stages and dead satellites occasionally reenter as dramatic fireballs. Predictable to within hours, but the track is uncertain by minutes (thousands of km). Track them at aerospace.org or satview.org.
TV/comms satellites at 35,786 km hang motionless above the equator (their orbit matches Earth's rotation). Mag 9–12 — a telescope target. On a clock-driven mount, the geostationary "star" stays still while real stars drift past it.
The dashboard predicts the ISS passes visible from your exact location tonight — computed live on your device — alongside the moon, planets and a clear-sky score, so you know whether the sky will cooperate.