Key statistics
Satellite COSMOS 2129 at a glance.
Uptime
12627
Days in orbit
Revolutions
≈ 12.5
Per day
Orbit
LEO
Low Earth Orbit
Inclination
74.0
Latest
Satellite identification and parameters
Extended collection of information and parameters for COSMOS 2129.
Object identification
Identified? True
Debris? False
Object name: COSMOS 2129
International designator: 1991-009E
Object number (NORAD): 21104
Object ID (CCSDS): 21104
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 114.857 minutes
Inclination: 74.0283 deg
SMA: 7827.035 km
Apoapsis: 1467.822 km
Periapsis: 1429.979 km
RAAN: 217.0441 deg
Eccentricy: 0.00241747
Argument of periapsis: 76.8252 deg
Mean anomaly: 345.7599 deg
Mean motion: 12.53738122 rev/day
Mean motion (dot): -0.00000024 rev/day2
B* drag term: -0.000053689305 1/REarth
Two-line elements (TLE)
Creation date: Sept. 8, 2025, 3:16 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 7, 2025, 10 p.m. UTC
TLE line 0: 0 COSMOS 2129
TLE line 1: 1 21104U 91009E 25250.91696287 -.00000024 00000-0 -53689-4 0 9992
TLE line 2: 2 21104 74.0283 217.0441 0024175 76.8252 345.7599 12.53738122582148
Live tracking on map
Real-time ground track for satellite COSMOS 2129.
In-orbit conjunctions
There are no conjunctions computed for COSMOS 2129, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
Military communications satellites
COSMOS 2129 was lifted into orbit during the mission ‘Kosmos-3M | Strela-1M 353-360’, on board a Kosmos-3M space rocket.
The launch took place on Feb. 12, 1991, 2:44 a.m. from 133/3 (133L).
For more information about the launch, click the button.
Kosmos-3M | Strela-1M 353-360
Agency: N/A
Status: Launch Successful
Launch date: Feb. 12, 1991, 2:44 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 133/3 (133L)
Location: Plesetsk Cosmodrome, Russian Federation
...
Latest news about this satellite
There are no fresh news available about this satellite. Check back as we update our databases every day.
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