Shiyan 33

Overview

Destination: Sun-Synchronous Orbit
Mission: Government/Top Secret

Sun-Synchronous Orbit Launch Area 94 (SLS-2 / 603) Jiuquan Satellite Launch Center, People's Republic of China

Chinese satellite reported to be for "space environment research" purposes. Actual usage not known.

Updates

Cosmic_Penguin • March 22, 2026, 5:59 p.m.

Changed tentative launch vehicle identification based on evidence of new drop zones.


Cosmic_Penguin • March 23, 2026, 11:44 p.m.

Change in possible launch vehicle identification based on possible information.


Cosmic_Penguin • March 26, 2026, 3:09 a.m.

Updated possible launch vehicle identity per newest information.


Cosmic_Penguin • March 27, 2026, 5:05 a.m.

Launch success.


Cosmic_Penguin • March 21, 2026, 8:25 p.m.

Added launch per NOTAMs; Launch vehicle and payload identities highly uncertain.


Long March 2C/YZ-1S

Family:
Configuration: C/YZ-1S

The Long March 2C is a family of expendable launch vehicles made and operated by China. It is a two stage launch vehicle with storable propellants, consisting of Nitrogen Tetroxide and Unsymmetrical Dimethylhydrazine.

Specifications
  • Stages
    3
  • Length
    42.0 m
  • Diameter
    3.35 m
  • Fairing Diameter
    3.35 m
  • Launch Mass
    233.0 T
  • Thrust
    2962.0 kN
Family
  • Name
    Long March 2C/YZ-1S
  • Family
  • Variant
    C/YZ-1S
  • Alias
  • Full Name
    Long March 2C/YZ-1S
Payload Capacity
  • Launch Cost
  • Low Earth Orbit
    3850.0 kg
  • Geostationary Transfer Orbit
    1250.0 kg
  • Direct Geostationary
  • Sun-Synchronous Capacity
    1400.0 kg

China Aerospace Science and Technology Corporation

China Aerospace Science and Technology Corporation

(CASC)

Chairman & President: Lei Fanpei Founded: 1999 Successes: 590 Failures: 15 Pending: 8

Agency Type:

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.

INFO WIKI

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Jiuquan Satellite Launch Center, People's Republic of China

Launch Area 94 (SLS-2 / 603)


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