Calculating tonight's sky
Fetching live orbital data
This takes a moment while live orbit, weather, and visibility data arrive.

ISS Flyover Explorer

Real-time ISS tracking and night-sky planning for your location.

Location not set
Use your location for local passes, sky events, and weather.
Update if you've moved since the last visit.

What To See Tonight

Tonight's ISS pass, standout sky event, moonlight, and weather at a glance.

ISS Tonight

Calculating…
Need location to evaluate tonight's visible ISS pass.

Sky Tonight

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Planets and alignments update with your location.

Moonlight Tonight

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Moon phase and sky darkness guidance.

Weather Tonight

Checking…
Cloud, wind, and clarity forecast for observing.
Drag to rotate, scroll to zoom. Track paths are computed from live ISS TLE data.
Drag to rotate the sky, scroll to zoom. The arc shows the ISS pass, planet markers show naked-eye targets, and faint constellation guides help with orientation.

Upcoming ISS Passes

Sky highlights show naked-eye planets plus moon phase context. ISS Best remains based on ISS visibility.

Waiting for location…

Enable geolocation to calculate passes
Standby

Night Sky Highlights

Grouped by observing night (sunset to dawn) with a top pick first and extra highlights underneath.

Waiting for location…

Enable geolocation to calculate sky highlights
Standby

Observing Conditions Tonight

Weather, clearest window, and moonlight conditions for stepping outside.

Waiting for forecast…

Weather and moonlight conditions appear here.
6 hours of orbit path
ISS position refreshes every 6 seconds. Forecast refreshes automatically when the app resumes or the day changes.
Usually not needed. Use it if the forecast looks stale.

Live Data

Live telemetry and observing context. Useful for tuning coordinates and checking real-time ISS state.

ISS Position

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Awaiting data

Your Location

Unknown
Geolocation not set

Next Visible Pass

Calculating…
Need location to predict

Visibility Status

Night check pending
Sun altitude unavailable

Moon Phase

Calculating…
Need location to evaluate sky darkness