The viewer shows a selection of low Earth orbit objects from CelesTrak's visual catalogue, excluding names identified as debris and rocket stages. It does not represent every satellite or their naked-eye visibility. Positions are calculated using SGP4 (satellite.js) for the time shown; they are not telemetry received directly from satellites.

The server attempts to refresh the elements every two hours. If this fails, the latest available copy is used and labelled on screen. Objects with elements older than seven days are displayed at their reference epoch as historical data. Manoeuvres and older elements reduce accuracy. Do not use for navigation or operational decisions.

Launches: Launch Library 2. Shared queries every 15 minutes, with possible source delays. Yellow marks the launch site of a selected launch or a reported flight, rather than the rocket's position. Reaching the scheduled time or an active webcast does not confirm liftoff. Flight indicators are disabled without recent data.

Map: Natural Earth / world-atlas. Libraries: D3 and satellite.js. The viewer is hosted on this website; the server queries CelesTrak.