Key statistics
Satellite COSMOS 921 DEB at a glance.
Uptime
17609
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: 93.241 minutes
Inclination: 75.8189 deg
SMA: 6811.305 km
Apoapsis: 445.119 km
Periapsis: 421.221 km
RAAN: 161.3925 deg
Eccentricy: 0.0017543
Argument of periapsis: 156.3282 deg
Mean anomaly: 203.875 deg
Mean motion: 15.44391139 rev/day
Mean motion (dot): 0.00034237 rev/day2
B* drag term: 0.00073462112 1/REarth
Two-line elements (TLE)
Creation date: Sept. 8, 2025, 6:18 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 8, 2025, 11:31 a.m. UTC
TLE line 0: 0 COSMOS 921 DEB
TLE line 1: 1 39690U 77055C 25251.47997903 .00034237 00000-0 73462-3 0 9998
TLE line 2: 2 39690 75.8189 161.3925 0017543 156.3282 203.8750 15.44391139626459
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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