Key statistics
Satellite CZ-4 R/B at a glance.
Uptime
12840
Days in orbit
Revolutions
≈ 13.9
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
99.0
Latest
Satellite identification and parameters
Extended collection of information and parameters for CZ-4 R/B.
Object identification
Identified? True
Debris? False
Object name: CZ-4 R/B
International designator: 1990-081D
Object number (NORAD): 20791
Object ID (CCSDS): 20791
Country: PEOPLES REPUBLIC OF CHINA (PRC)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 103.373 minutes
Inclination: 98.9991 deg
SMA: 7296.231 km
Apoapsis: 956.456 km
Periapsis: 879.736 km
RAAN: 266.2193 deg
Eccentricy: 0.0052575
Argument of periapsis: 341.3757 deg
Mean anomaly: 127.8548 deg
Mean motion: 13.9301202 rev/day
Mean motion (dot): 0.00000141 rev/day2
B* drag term: 0.00014002908 1/REarth
Two-line elements (TLE)
Creation date: Oct. 28, 2025, 7:11 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 28, 2025, 11:40 a.m. UTC
TLE line 0: 0 CZ-4 R/B
TLE line 1: 1 20791U 90081D 25301.48644488 .00000141 00000-0 14003-3 0 9991
TLE line 2: 2 20791 98.9991 266.2193 0052575 341.3757 127.8548 13.93012020786332
Live tracking on map
Real-time ground track for satellite CZ-4 R/B.
In-orbit conjunctions
A list of the most updated potential collisions computed for object CZ-4 R/B.
Associated space launch
Chinese polar orbiting meteorological satellite
CZ-4 R/B was lifted into orbit during the mission ‘Long March 4A | Feng Yun 1B’, on board a Long March 4A space rocket.
The launch took place on Sept. 3, 1990, 12:53 a.m. from Launch Complex 7.
For more information about the launch, click the button.
Long March 4A | Feng Yun 1B
Agency: N/A
Status: Launch Successful
Launch date: Sept. 3, 1990, 12:53 a.m. UTC
Rocket: Long March 4A
Launch pad: Launch Complex 7
Location: Taiyuan Satellite Launch Center, People's Republic of China
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