Key statistics
Satellite YZ-1S R/B at a glance.
Uptime
3
Days in orbit
Revolutions
≈ 15.5
Per day
Orbit
LEO
Low Earth Orbit
Inclination
50.0
Latest
Satellite identification and parameters
Extended collection of information and parameters for YZ-1S R/B.
Object identification
Identified? True
Debris? False
Object name: YZ-1S R/B
International designator: 2025-209E
Object number (NORAD): 65621
Object ID (CCSDS): 65621
Country: PEOPLES REPUBLIC OF CHINA (PRC)
Current information (Y/N): Y
Orbital parameters
Decay date: Sept. 19, 2025
Period: 92.728 minutes
Inclination: 49.9704 deg
SMA: 6786.327 km
Apoapsis: 708.685 km
Periapsis: 107.699 km
RAAN: 330.0593 deg
Eccentricy: 0.0442792
Argument of periapsis: 324.7574 deg
Mean anomaly: 32.4835 deg
Mean motion: 15.52925429 rev/day
Mean motion (dot): 0.08424882 rev/day2
B* drag term: 0.00015498 1/REarth
Two-line elements (TLE)
Creation date: Sept. 29, 2025, 11:16 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 17, 2025, 8:32 p.m. UTC
TLE line 0: 0 OBJECT E
TLE line 1: 1 65621U 25209E 25260.85569006 .08424882 10456-4 15498-3 0 9998
TLE line 2: 2 65621 49.9704 330.0593 0442792 324.7574 32.4835 15.52925429 254
Live tracking on map
Satellite YZ-1S R/B has decayed and is no longer in orbit. No tracking available.
In-orbit conjunctions
Satellite YZ-1S R/B has decayed and is no longer in orbit. No conjunctions available.
Associated space launch
Officially described as "Satellite-Internet Technology Demonstration Satellite(s)". Probably test satellites for the Chinese state-owned LEO communication satellite constellation SatNet.
YZ-1S R/B was lifted into orbit during the mission ‘Long March 2C/YZ-1S | SatNet test satellites’, on board a Long March 2C/YZ-1S space rocket.
The launch took place on Sept. 16, 2025, 1:06 a.m. from Launch Area 4 (SLS-2 / 603).
For more information about the launch, click the button.

Long March 2C/YZ-1S | SatNet test satellites
Agency: N/A
Status: Launch Successful
Launch date: Sept. 16, 2025, 1:06 a.m. UTC
Rocket: Long March 2C/YZ-1S
Launch pad: Launch Area 4 (SLS-2 / 603)
Location: Jiuquan Satellite Launch Center, People's Republic of China
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