Key statistics
Satellite COSMOS 521 at a glance.
Uptime
19275
Days in orbit
Revolutions
≈ 13.7
Per day
Orbit
LEO
Low Earth Orbit
Inclination
65.8
Latest
Satellite identification and parameters
Extended collection of information and parameters for COSMOS 521.
Object identification
Identified? True
Debris? False
Object name: COSMOS 521
International designator: 1972-074A
Object number (NORAD): 6206
Object ID (CCSDS): 6206
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 104.918 minutes
Inclination: 65.8284 deg
SMA: 7368.745 km
Apoapsis: 1005.818 km
Periapsis: 975.403 km
RAAN: 50.2057 deg
Eccentricy: 0.0020638
Argument of periapsis: 251.4437 deg
Mean anomaly: 118.9402 deg
Mean motion: 13.72500247 rev/day
Mean motion (dot): -0.00000066 rev/day2
B* drag term: 0.000015384 1/REarth
Two-line elements (TLE)
Creation date: July 8, 2025, 2:27 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 7, 2025, 8:53 p.m. UTC
TLE line 0: 0 COSMOS 521
TLE line 1: 1 06206U 72074A 25188.87083034 -.00000066 00000-0 15384-4 0 9999
TLE line 2: 2 06206 65.8284 50.2057 0020638 251.4437 118.9402 13.72500247644362
Live tracking on map
Real-time ground track for satellite COSMOS 521.
Associated space launch
ASAT target satellite
COSMOS 521 was lifted into orbit during the mission ‘Kosmos-3M | DS-P1-M 6’, on board a Kosmos-3M space rocket.
The launch took place on Sept. 29, 1972, 8:18 p.m. from 132/2.
For more information about the launch, click the button.
Kosmos-3M | DS-P1-M 6
Agency: N/A
Status: Launch Successful
Launch date: Sept. 29, 1972, 8:18 p.m. UTC
Rocket: Kosmos-3M
Launch pad: 132/2
Location: Plesetsk Cosmodrome, Russian Federation
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