Mission
Long March 4B will launch from Launch Area 94 (SLS-2 / 603) at Jiuquan Satellite Launch Center, People’s Republic of China.
- Liftoff
- · ~
- Window
- – 22 min
- Rocket
- Long March 4BCASC
- Launch site
- Launch Area 94 (SLS-2 / 603), Jiuquan, China7th launch from this pad in 202643 days after the last
- Latest update
- Refined launch window per new NOTAMs.
51st
CASC launch of 2026
Long March 4B
CASC58 launches since May 1999, 57 successful
44.1m
Height
3.4m
Diameter
249t
Mass at liftoff
3.0MN
Thrust at liftoff
4.2t
Payload to low Earth orbit
1.5t
Payload to geostationary transfer orbit
About Long March 4B
The Long March 4B (Chinese: 长征四号乙火箭), also known as the Chang Zheng 4B, CZ-4B and LM-4B is a Chinese orbital carrier rocket. Launched from Launch Complex 1 at the Taiyuan Satellite Launch Center, it is a 3-stage rocket, used mostly to place satellites into low Earth and sun synchronous orbits.
Orbit estimated from CelesTrak’s elementsMeasured trackSpaceX’s predicted path
In orbit now
The crewed stations and Hubble, once around the Earth every 92 to 94 minutes
| Spacecraft | Altitude | Speed |
|---|---|---|
| ISSDocked: Soyuz MS-29, Crew-13In Earth’s shadow | 428km | 27,566km/h |
| TiangongDocked: Shenzhou-23In sunlight | 387km | 27,646km/h |
| Shenzhou-23In sunlight | 387km | 27,646km/h |
| Soyuz MS-29In Earth’s shadow | 428km | 27,566km/h |
| Crew-13In Earth’s shadow | 428km | 27,566km/h |
| HubbleIn sunlight | 476km | 27,463km/h |
Estimated for from CelesTrak’s orbital elements, up to 33 h old.
