Long March 3C/YZ-1 | Shiyan 29 — launch time, webcast & live countdown

Long March 3C/YZ-1 | Shiyan 29 launched on Fri, Sep 5, 2025, 02:34 AM UTC — a China Aerospace Science and Technology Corporation mission.

Launch SuccessfulChina Aerospace Science and Technology Corporation

Lifted offNET Sep 2025

NET Fri, Sep 5, 2025, 02:34 AM UTC

Live coverage

Watch the webcast

Mission profile

Government/Top SecretMission type

Geosynchronous OrbitOrbit

Flight simulation

A representative gravity-turn climb for Long March 3C/YZ-1 to Geosynchronous Orbit. Illustrative model — not this mission’s live telemetry.

Mission timeT+0:00

Altitude0.0 km

Velocity0.00 km/s

PhaseLiftoff

T+0:00 / 17:30

SimulatedRepresentative Long March 3C/YZ-1 ascent profile — illustrative model, not this mission’s live telemetry.

The mission

Satellite officially named for "space environment detection" purposes, exact details unknown.

Around this launch

No news linked to this launch yet

As coverage publishes, deduplicated articles about this mission will appear here.

Good to know

What time does Long March 3C/YZ-1 | Shiyan 29 launch?

Long March 3C/YZ-1 | Shiyan 29 is scheduled to lift off Fri, Sep 5, 2025, 02:34 AM UTC.

Where can I watch Long March 3C/YZ-1 | Shiyan 29?

Watch the official live webcast embedded on this page — it goes live shortly before liftoff.

Who is launching Long March 3C/YZ-1 | Shiyan 29?

Long March 3C/YZ-1 | Shiyan 29 is an China Aerospace Science and Technology Corporation mission flying on a Long March 3C/YZ-1.

Where does Long March 3C/YZ-1 | Shiyan 29 launch from?

It lifts off from Launch Complex 2 (LC-2), Xichang Satellite Launch Center, People's Republic of China.

Aurora

Tuning into the cosmos…