Launches / Long March 3C/YZ-1

Past launch Launched successfully

Shiyan 29

Long March 3C/YZ-1, flown by China Aerospace Science and Technology Corporation

Long March 3C/YZ-1 lifting off with the Shiyan 29 mission
Image via The Space Devs.

This was China Aerospace Science and Technology Corporation's 38th launch of 2025, and its 539th in all.

Counting every operator, it was the 202nd orbital launch attempt anywhere in 2025, and the seventh from Launch Complex 2 (LC-2).

Launched
Friday, Sept. 5, 2025, 2:34 a.m. UTC
Window
Friday, Sept. 5, 2025, 2:26 to 2:53 a.m. UTC
Launch site
Xichang Satellite Launch Center, China
Rocket
Long March 3C/YZ-1
Operator
China Aerospace Science and Technology Corporation

Watch the webcast →

The mission

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

Type
Government/top secret
Destination
Geosynchronous orbit

The rocket

Height
54.8 m
Built by
China Aerospace Science and Technology Corporation
First flew
March 30, 2015
Lifts to geostationary transfer
4,800 kg
View 3 specifications Show less
Diameter
3.4 m
Mass at liftoff
345 t
Thrust at liftoff
4,441 kN

3 flights, 3 of them successful.

Wikipedia →

The operator

China Aerospace Science and Technology Corporation

The China Aerospace Science and Technology Corporation (CASC) is the main contractor for the Chinese space program. It is state-owned and has a number of subordinate entities which design, develop and manufacture a range of spacecraft, launch vehicles, strategic and tactical missile systems, and ground equipment. It was officially established in July 1999 as part of a Chinese government reform drive, having previously been one part of the former China Aerospace Corporation. Various incarnations of the program date back to 1956.

Sector
Government
Based in
China
Founded
1999
Run by
Lei Fanpei, Chairman & President

612 launches so far, 596 of them successful. The last 3 in a row went to plan.

english.spacechina.com → Wikipedia →

The launch site

It went up from Launch Complex 2 (LC-2) at Xichang Satellite Launch Center, China.

See the pad on a map →

Catch the next one instead

This one is done, but there is another along shortly. Flyby works out whether it climbs into your sky, and wakes you in time to get outside.

Get Flyby free