HOW LONG DOES STARLINK TAKE TO ORBIT EARTH?
THE ANSWER IS ABOUT 95 MINUTES, BUT THE EXACT TIME DEPENDS ON THE SATELLITE'S ORBIT
THE SHORT ANSWER
A Starlink satellite in a typical 550km service orbit takes approximately 95 minutes and 30 seconds to travel once around Earth.
That is about one hour and 35 minutes, allowing a single satellite to complete roughly 15.1 orbits every 24 hours.
Not every Starlink satellite takes exactly the same amount of time. SpaceX operates satellites in several orbital shells and also moves newly launched satellites through lower parking orbits. Across the main 500 to 600km operating range, one circuit takes approximately 94.5 to 96.5 minutes.
THE TYPICAL 550KM STARLINK ORBIT
SpaceX and Starlink commonly use approximately 550km as the reference altitude for the operational network.
Using a near-circular orbit at that height gives the following result:
| MEASUREMENT | APPROXIMATE RESULT |
|---|---|
| Time for one orbit | 95 minutes 30 seconds |
| Orbits in 24 hours | 15.08 |
| Orbital speed | 7.59km per second |
| Orbital speed per hour | About 27,300km/h |
| Distance travelled in one circuit | About 43,486km |
The 43,486km figure is the circumference of the satellite's path around Earth's centre. It is larger than Earth's surface circumference because the satellite is travelling hundreds of kilometres above the ground.
WHY THE ORBITAL TIME IS NOT ALWAYS 95 MINUTES
SpaceX says the Starlink constellation uses several service shells in the 500 to 600km range. Newly launched satellites can also spend time in lower parking orbits before reaching their assigned position.
A lower satellite moves faster and completes its circuit sooner. A higher satellite moves slightly more slowly and has a longer path, so its orbital period increases.
| ORBIT STAGE | REFERENCE HEIGHT | TIME FOR ONE ORBIT | ORBITS PER DAY |
|---|---|---|---|
| Lower parking orbit | 350km | 91 min 24 sec | 15.76 |
| Lower service range | 500km | 94 min 28 sec | 15.24 |
| Typical service orbit | 550km | 95 min 30 sec | 15.08 |
| Upper service range | 600km | 96 min 32 sec | 14.92 |
The figures use simplified circular orbits. Real satellites make small adjustments and are affected by Earth's non-perfect shape, atmospheric drag and other forces, so an individual measured period can differ slightly.
For a dedicated explanation of the orbital heights themselves, see How High Do Starlink Satellites Orbit?
HOW IS THE STARLINK ORBIT TIME CALCULATED?
The time for one orbit is called the orbital period. For a near-circular Earth orbit, it can be estimated using:
ORBITAL PERIOD FORMULA
T = 2π √(r³ ÷ μ)
In this formula:
| SYMBOL | MEANING | VALUE USED FOR 550KM EXAMPLE |
|---|---|---|
| T | Time for one complete orbit | Result to calculate |
| r | Distance from Earth's centre | 6,371km + 550km = 6,921km |
| μ | Earth's standard gravitational parameter | 398,600km³/s² |
Putting those values into the formula gives approximately 5,730 seconds, which is 95 minutes and 30 seconds.
HOW FAST DOES STARLINK TRAVEL DURING ONE ORBIT?
A Starlink satellite at approximately 550km travels at about 7.59 kilometres per second.
That is approximately:
| TIME | DISTANCE TRAVELLED |
|---|---|
| 1 second | 7.59km |
| 1 minute | About 455km |
| 1 hour | About 27,300km |
| One 95.5-minute orbit | About 43,486km |
The satellite is not using its thruster continuously to maintain this speed. Its forward motion and Earth's gravity combine to keep it falling around the planet rather than straight down to the surface.
HOW MANY TIMES DOES STARLINK ORBIT EARTH EACH DAY?
Dividing 24 hours by the 95.5-minute period gives approximately 15.08 complete orbits per day.
In practical terms, a typical satellite circles Earth:
| TIME PERIOD | APPROXIMATE NUMBER OF ORBITS |
|---|---|
| 24 hours | 15.1 |
| 7 days | 105.5 |
| 30 days | 452.3 |
| 365 days | About 5,504 |
These totals assume the satellite remains at the same height. Orbit-raising, station-keeping and deorbit manoeuvres alter the period slightly.
WHY DOES IT NOT PASS OVER THE SAME PLACE EVERY 95 MINUTES?
The satellite completes one circuit relative to space in about 95.5 minutes, but Earth rotates underneath it during that time.
This means the next orbit follows a different path over the ground. The satellite has completed a full loop around Earth's centre, but it does not return directly above the same town, road or house.
Its exact ground track also depends on the inclination of its orbital plane. This is why one satellite's repeated passes form a pattern across the planet rather than tracing the same line every orbit.
ONE ORBIT IS NOT ONE REPEAT PASS
The satellite returns to the same position in its orbital path after about 95.5 minutes. Earth has moved underneath, so the point directly below it is different.
DOES A STARLINK DISH FOLLOW ONE SATELLITE FOR 95 MINUTES?
No. A satellite only remains in useful view of one customer for part of its orbit.
As one spacecraft moves towards the edge of the dish's visible sky, the Starlink network transfers the connection to another satellite approaching from a different direction.
The 95.5-minute figure therefore describes the satellite's complete journey around Earth. It is not the amount of time a household remains connected to one individual spacecraft.
COMMON CONFUSIONS ABOUT STARLINK ORBIT TIME
| STATEMENT | IS IT CORRECT? | EXPLANATION |
|---|---|---|
| Every Starlink orbit takes exactly 90 minutes | No | A typical service orbit is closer to 95.5 minutes. |
| Every Starlink satellite has the same period | No | Different orbital heights produce slightly different periods. |
| The satellite is above the same house every 95 minutes | No | Earth rotates underneath the orbit. |
| A Starlink dish waits for the same satellite to return | No | The connection moves between satellites in the constellation. |
| Higher satellites take longer to orbit | Yes | Their orbital path is larger and their orbital speed is slightly lower. |
SOURCES AND CALCULATION METHOD
Starlink: Technology overview using approximately 550km as the reference orbit
SpaceX: Starlink orbit-raising, parking and on-station phases
SpaceX GNC memo: Starlink orbital shells and typical mission profile
NASA Glenn Research Center: Circular-orbit speed and orbital-period equations
Calculated values use a mean Earth radius of 6,371km and Earth's standard gravitational parameter of 398,600.4418km³/s². Results are rounded for readability.
FAQS ABOUT STARLINK'S ORBITAL PERIOD
HOW LONG DOES STARLINK TAKE TO ORBIT EARTH?
A satellite in a typical 550km service orbit takes about 95 minutes and 30 seconds to complete one circuit.
HOW MANY TIMES DOES STARLINK ORBIT EARTH EACH DAY?
At 550km, a satellite completes approximately 15.1 orbits in 24 hours.
HOW FAST DOES A STARLINK SATELLITE TRAVEL?
Approximately 7.59km per second, or about 27,300km/h, in a typical 550km circular orbit.
DO ALL STARLINK SATELLITES TAKE THE SAME TIME?
No. The period changes with altitude. Across 500 to 600km, it is approximately 94.5 to 96.5 minutes.
DOES THE SATELLITE PASS OVER THE SAME PLACE EACH ORBIT?
No. Earth rotates underneath it, so the next ground track is shifted.
DOES MY DISH CONNECT TO ONE SATELLITE FOR 95 MINUTES?
No. The network hands the connection between satellites as they move across the sky.
THE ANSWER IN ONE SENTENCE
A typical Starlink satellite travels around Earth once every 95 minutes and 30 seconds, completing just over 15 orbits per day.