About FindSpaceMobile
FindSpaceMobile is an unofficial fan tracker for AST SpaceMobile spacecraft. It shows BlueWalker 3 and the BlueBird satellites — including ones cataloged after this app was built — on a globe you can spin, follow, and scrub through time.
Where the orbits come from
Element sets are public general perturbations data from CelesTrak. The server asks for the AST Space Mobile supplemental group (FILE=ast) and also searches the public GP catalog by name for SPACEMOBILE, BLUEWALKER, and BLUEBIRD. NORAD catalog numbers are read from those responses, so a newly launched satellite appears when CelesTrak publishes it. No API key is used.
Launch dates and decay status come from CelesTrak's SATCAT. Debris and objects that have already reentered are left off the globe. That includes the unrelated BlueWalker 1 cubesat and BlueBird 7 (SPACEMOBILE-007), which reentered after a failed launch. CelesTrak names the fleet BLUEWALKER-3 and SPACEMOBILE-00N. FindSpaceMobile labels the numbered SpaceMobile spacecraft as BlueBird N, matching that suffix, and always shows the catalog name beside it.
CelesTrak asks users not to download GP data more often than it is updated (about every two hours). FindSpaceMobile caches a successful download for four hours, keeps a short-lived backoff if a request fails, and ships a bundled snapshot so the globe still works when CelesTrak is down. The browser propagates those elements with satellite.js (SGP4) about once a second. Positions are estimates from mean elements. They are fine for curiosity and pass planning, and they are not an operational ephemeris.
Your location
Pass predictions run entirely in the browser. If you opt in, the page asks for geolocation, draws you on the globe, and lists rise, peak, and set times. The coordinate stays in local storage on this device. It is not sent to a server.
Privacy and analytics
The coordinate used for passes stays in local storage on this device. City and ZIP searches use a small list bundled with the page. None of that is posted to the FindSpaceMobile server. This build loads Google Analytics 4 after the page is interactive. It records the page path, and events for a shared location (GPS or manual — not the coordinates), the satellite name you select, a footprint toggle, and that the next-pass card was shown. It does not send precise location or other personal data. Google may set its own analytics cookies.
What this is not
FindSpaceMobile is not affiliated with, endorsed by, or operated by AST SpaceMobile, CelesTrak, or the U.S. Space Force. Don't use it for safety of flight, collision avoidance, or anything that needs a certified orbit. AST SpaceMobile and BlueBird are names used here only to identify the public spacecraft being tracked.
Orbital data courtesy of CelesTrak. Earth imagery is the NASA Blue Marble.