Starlink Train Tonight
Find recent Starlink launch groups and calculate their best viewing opportunities near you.
How to use this tracker
A newly launched group is most train-like before its satellites spread into operational orbits. Predictions remain estimates and clouds are not modeled.
A “Starlink train” is most noticeable soon after deployment, while satellites from the same launch are still relatively close together. The live tool groups recent launches and estimates how their propagated paths relate to your local horizon.
What creates the train appearance
After a launch deploys multiple Starlink satellites, they initially share similar orbital geometry. From the ground this can create a line or chain of moving points. As the spacecraft raise and phase their orbits, the group spreads out and the classic train appearance becomes less obvious.
That is why an ordinary Starlink constellation map and a train finder answer different questions. The constellation tracker is best for individual spacecraft across the network; this page emphasizes recent launch groups and near-term viewing opportunities.
How to interpret a predicted pass
Use your city or device location first. A pass estimate is based on propagated orbital positions and local horizon geometry. Start time tells you when the representative path enters a useful part of the sky; maximum elevation indicates how high it may climb; direction helps you know where to begin looking.
The live visualization is a model, not a camera view. Clouds, haze, urban lighting and the changing orientation of individual satellites can make a predicted group difficult or impossible to see.
Why Starlink predictions can change quickly
Newly deployed Starlink satellites are not passive objects following an unchanging path. Orbit raising and constellation phasing involve manoeuvres. Any prediction based on an older element set can therefore drift as the real spacecraft changes orbit and new observations become available.
For practical viewing, recheck the tracker near the time you plan to observe and pay attention to the source freshness shown above.
Brightness and responsible interpretation
Sunlit geometry is necessary for many naked-eye sightings, but it does not guarantee a bright train. Apparent brightness varies with range, phase angle, spacecraft attitude and observing conditions. Treat the tool as a planning aid rather than a promise of a spectacular display.
Data sources
Orbital elements are sourced through CelesTrak and propagated locally. For information about the operator and constellation, see the official Starlink website.
Frequently asked questions
How long does a Starlink train stay together?
There is no fixed duration. The visual grouping changes as satellites separate, raise orbit and phase into the constellation.
Can I see a Starlink train in the middle of the night?
Sometimes, but illumination geometry is often more favorable around evening or morning twilight.
Why are only some satellites in a launch group visible?
Brightness, orientation, distance and shadow conditions can differ across the group.
Is the animated sky path a live video feed?
No. It is a visualization of calculated orbital positions from current orbital data.
What is a Starlink train?
A Starlink train is the temporary line-like appearance of satellites from a relatively recent deployment. Soon after release, members of a launch group can remain close enough together that several objects cross the sky along a similar path. As the satellites raise, phase and separate into their intended orbital geometry, the dramatic “train” appearance usually becomes less compact.
This is different from the full Starlink constellation. The Starlink Live Tracker is designed to search and follow individual catalogued satellites across the entire constellation, while this page emphasizes recent groups and local viewing opportunities.
How to know whether a Starlink train may be visible tonight
Set your location first, then examine the predicted pass geometry for a recent group. A useful viewing opportunity normally requires the satellites to be above your horizon, illuminated by sunlight and observed against a sufficiently dark sky. Predictions can still fail visually because clouds, haze, bright twilight, local obstructions and changing spacecraft brightness are outside a simple orbital model.
For local darkness and Moon conditions, open Sky Tonight. If you want to see other bright spacecraft during the same observing session, use Satellites Above Me Tonight.
Why recent orbital data matter for Starlink groups
Satellites in a recent deployment can maneuver while raising and phasing their orbits. Predictions based on older orbital elements can therefore drift faster than predictions for a stable object. Public GP/OMM data are updated as new observations become available, and the SGP4 propagator is then used to estimate each object's position at the requested time. CelesTrak documents these formats at GP data formats.
Best practical viewing method
Arrive a few minutes early, choose an open view of the predicted direction and let your eyes adapt to the dark. Start watching near the listed rise direction and scan a wider part of the sky rather than staring at one star. A Starlink group moves steadily relative to the background stars; aircraft usually show blinking navigation lights, while meteors cross the sky much faster.
Frequently asked questions
Does every Starlink launch create a bright train?
No. Geometry, deployment timing, spacecraft brightness and your location all affect whether a group produces an obvious visual train.
Will the same train stay together permanently?
No. The satellites progressively spread out as they maneuver toward their operational arrangement.