Key statistics
Satellite COSMOS 621 at a glance.
Uptime
18994
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 621.
Object identification
Identified? True
Debris? False
Object name: COSMOS 621
International designator: 1973-104E
Object number (NORAD): 6989
Object ID (CCSDS): 6989
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 114.771 minutes
Inclination: 74.0302 deg
SMA: 7823.145 km
Apoapsis: 1483.672 km
Periapsis: 1406.348 km
RAAN: 347.3278 deg
Eccentricy: 0.004942
Argument of periapsis: 118.4829 deg
Mean anomaly: 253.7046 deg
Mean motion: 12.54673472 rev/day
Mean motion (dot): -0.00000014 rev/day2
B* drag term: 0.000013804 1/REarth
Two-line elements (TLE)
Creation date: Dec. 19, 2025, 9:06 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 19, 2025, 6:20 a.m. UTC
TLE line 0: 0 COSMOS 621
TLE line 1: 1 6989U 73104E 25353.26450008 -.00000014 00000-0 13804-4 0 9996
TLE line 2: 2 6989 74.0302 347.3278 0049420 118.4829 253.7046 12.54673472381691
Live tracking on map
Real-time ground track for satellite COSMOS 621.
In-orbit conjunctions
There are no conjunctions computed for COSMOS 621, 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 621 was lifted into orbit during the mission ‘Kosmos-3M | Strela-1M 57-64’, on board a Kosmos-3M space rocket.
The launch took place on Dec. 19, 1973, 9:43 a.m. from 132/2.
For more information about the launch, click the button.
Kosmos-3M | Strela-1M 57-64
Agency: N/A
Status: Launch Successful
Launch date: Dec. 19, 1973, 9:43 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 132/2
Location: Plesetsk Cosmodrome, Russian Federation
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Latest news about this satellite
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