Long March 4B
ActiveChina Aerospace Science and Technology Corporation (CASC)
May 10, 1999
Description
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.
Specifications
-
Stages
3 -
Length
44.1 m -
Diameter
3.35 m -
Fairing Diameter
― -
Launch Mass
249.0 T -
Thrust
2961.0 kN
Family
-
Name
Long March 4B -
Family
― -
Variant
B -
Alias
― -
Full Name
Long March 4B
Payload Capacity
-
Launch Cost
― -
Low Earth Orbit
4200.0 kg -
Geostationary Transfer
Orbit
1500.0 kg -
Direct Geostationary
― -
Sun-Synchronous Capacity
―
China Aerospace Science and Technology Corporation
Government
Chairman & President: Lei Fanpei
CASC 1999The 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.
Long March 4B | Tianhui 7
China Aerospace Science and Technology Corporation | ChinaJiuquan Satellite Launch Center, People's Republic of China
Dec. 30, 2025, 4:12 a.m.
Long March 4B | Ziyuan-3-04
China Aerospace Science and Technology Corporation | ChinaTaiyuan Satellite Launch Center, People's Republic of China
Dec. 16, 2025, 3:17 a.m.
Status: Launch Successful
Mission:
The ZY-3 (Ziyuan-3, 'Resource-3') series represents China's first high-resolution, stereoscopic mapping satellites for civilian use. The second satellite is managed by the Satellite Surveying and Mapping Application Center (SASMAC). The imaging payload consists of a three-line camera array and a multispectral imager. The three-line panchromatic camera array to acquire stereoscopic imagery consists of three telescopic cameras with one oriented to the nadir and the other two each offset by 22° forward and backward in flight direction. The stereo mapping camera of ZY-3 has a resolution of 2.1 m for the nadir camera, and 2.6 m for the offset cameras. The swath width is 51 km. The multispectral imager for environmental and vegetation monitoring consists of a three-mirror telescope and a cooled detector system sensitive to four wavelength bands to capture full-color imagery as well as near-infrared data. The ground resolution of this system is 5.8 m.
Sun-Synchronous OrbitLong March 4B | Yaogan 47
China Aerospace Science and Technology Corporation | ChinaJiuquan Satellite Launch Center, People's Republic of China
Dec. 9, 2025, 3:41 a.m.
Long March 4B | Shijian 26
China Aerospace Science and Technology Corporation | ChinaJiuquan Satellite Launch Center, People's Republic of China
May 29, 2025, 4:12 a.m.
Falcon 9
Starlink Group 17-35
Space Launch Complex 4E - Vandenberg SFB, CA, USAA batch of 25 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Falcon 9
Starlink Group 10-58
Space Launch Complex 40 - Cape Canaveral SFS, FL, USAA batch of 29 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Soyuz-5
Demo Flight
45/1 - Baikonur Cosmodrome, Republic of KazakhstanDemonstration Flight for Russia's new Soyuz-5 launch vehicle, with a mass simulator on board. Details TBD.
Space Launch System (SLS)
Artemis II
Launch Complex 39B - Kennedy Space Center, FL, USAArtemis II is the first crewed mission as part of the Artemis program. Artemis II will send a crew of 4 - 3 Americans and 1 Canadian around the moon …
Soyuz 2.1a/Fregat-M
Meridian-M No.21L
43/3 (43L) - Plesetsk Cosmodrome, Russian FederationNote: Payload identity uncertain. Meridian is a series of communications satellite for military and civilian use.
