Live satellite tracking with plain-English directions
Earth: NASA Blue Marble • TLEs: tle.ivanstanojevic.me • SGP4: satellite.js • ISS: WhereTheISS.at
Plain-English directions for every tracked satellite from your location.
What else to look for beyond satellites.
Real-time SGP4 propagation — see which Starlinks are above your horizon right now.
| NAME | NORAD | AZ ° | EL ° ▾ | RANGE KM | ALT KM | DIR | VIEW |
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No telescope needed. Here's everything you need to know.
A satellite looks like a steady, bright dot moving smoothly across the sky — like a slow-moving plane but with no blinking lights. It takes 2–5 minutes to cross from horizon to horizon.
They're brightest during twilight (just after sunset or before sunrise) when the sky is dark but the satellite is high enough to still catch sunlight.
Starlink satellites sometimes appear as a "train" of dots in a line shortly after launch, before they spread out to their operational orbits.
Satellite: Steady light, moves smoothly, no blinking. Crosses the sky in 2–5 minutes. May fade in or out as it enters Earth's shadow.
Plane: Has blinking red/green/white lights. Usually you can hear it if it's close enough to see clearly.
Star/Planet: Doesn't move (or moves very slowly over hours). Stars twinkle, planets don't.
Real-time satellite tracking powered by open data. Everything on this site runs in your browser — no servers, no accounts, no tracking.
SGP4 orbital mechanics running locally — satellite positions update every 2 seconds.
Telescope-ready azimuth, elevation & range computed from your GPS coordinates.
Solar position, twilight detection & sunlit calculations tell you when to look.
Full constellation tracking with pass predictions and beginner-friendly spotting directions.
TLE / OMM data — CelesTrak (Dr. T.S. Kelso) • Space-Track.org (18th Space Defense Squadron)
ISS position — WhereTheISS.at API • reverse geocoding
Star catalogue — Hipparcos (ESA) via d3-celestial • IAU constellation boundaries
Earth imagery — NASA Visible Earth (Blue Marble)