About OrbitNight
OrbitNight is a free guide to the sky above you, in English and Korean: where every tracked satellite is right now, when the ISS, Tiangong and Starlink trains pass over your town, the Moon and planets tonight, eclipses and meteor showers, rocket launches and objects falling back to Earth.
What you can do here
- Find any of ~30,000 tracked objects and follow it live on a map, with its orbit history and radio frequencies.
- See when satellites pass over your location, which ones you can see with the naked eye, and get an alert 10 minutes before.
- Check tonight's sky for 226 cities: Moon phase and moonrise, planets, a month-by-month sky calendar.
- Identify a light you just saw, or point your phone camera at the sky to find a satellite.
- Follow launches, Starlink trains, re-entries, people in space and the year's sky events.
- Read guides and print activities for classes and families.
Where the data comes from
- Orbits
- Space-Track.org (USSPACECOM) element sets, refreshed hourly; re-entry forecasts daily, TIP messages hourly.
- Launches, crews
- The Space Devs, Launch Library 2.
- Satellite facts
- Wikidata (CC0), weekly.
- Radio
- SatNOGS DB transmitters (daily) and SatNOGS Network receptions, CC BY-SA 4.0.
- Sky
- Moon, planets and events computed with Astronomy Engine (MIT); star chart from d3-celestial (BSD).
- Maps
- OpenFreeMap tiles with OpenStreetMap data; preview maps from Natural Earth (public domain).
- Cities
- GeoNames, CC BY 4.0.
How accurate is it?
- Positions use the SGP4 model on the latest element set (TLE). Accuracy is typically within a few kilometers for a fresh TLE and drifts as it ages; each satellite shows its TLE age.
- Pass times are accurate to a few seconds for low-orbit satellites with recent element sets; re-entry forecasts are uncertain by hours.
- Predictions are for observing and learning, not for navigation or safety.
- Your location is used to compute what you see and is not kept.