Key statistics
Satellite COSMOS 921 DEB at a glance.
Uptime
17546
Days in orbit
Revolutions
≈ 15.4
Per day
Orbit
LEO
Low Earth Orbit
Inclination
75.8
Latest
Satellite identification and parameters
Extended collection of information and parameters for COSMOS 921 DEB.
Object identification
Identified? True
Debris? True
Object name: COSMOS 921 DEB
International designator: 1977-055C
Object number (NORAD): 39690
Object ID (CCSDS): 39690
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: SMALL
Orbital parameters
Period: 93.451 minutes
Inclination: 75.8194 deg
SMA: 6821.564 km
Apoapsis: 454.5 km
Periapsis: 432.358 km
RAAN: 288.4503 deg
Eccentricy: 0.0016229
Argument of periapsis: 332.7049 deg
Mean anomaly: 27.3315 deg
Mean motion: 15.40908424 rev/day
Mean motion (dot): 0.00021794 rev/day2
B* drag term: 0.00052702 1/REarth
Two-line elements (TLE)
Creation date: July 5, 2025, 4:36 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 4, 2025, 4:54 p.m. UTC
TLE line 0: 0 COSMOS 921 DEB
TLE line 1: 1 39690U 77055C 25185.70453809 .00021794 00000-0 52702-3 0 9990
TLE line 2: 2 39690 75.8194 288.4503 0016229 332.7049 27.3315 15.40908424616316
Live tracking on map
Real-time ground track for satellite COSMOS 921 DEB.
Associated space launch
Dynamic simulator of the Tselina-D ELINT satellite
COSMOS 921 DEB was lifted into orbit during the mission ‘Tsiklon-3 | EPN 03.0380 1’, on board a Tsiklon-3 space rocket.
The launch took place on June 24, 1977, 10:30 a.m. from 32/2.
For more information about the launch, click the button.
Tsiklon-3 | EPN 03.0380 1
Agency: N/A
Status: Launch Successful
Launch date: June 24, 1977, 10:30 a.m. UTC
Rocket: Tsiklon-3
Launch pad: 32/2
Location: Plesetsk Cosmodrome, Russian Federation
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