Key statistics
Satellite COSMOS 2166 at a glance.
Uptime
12355
Days in orbit
Revolutions
≈ 12.6
Per day
Orbit
LEO
Low Earth Orbit
Inclination
82.6
Latest
Satellite identification and parameters
Extended collection of information and parameters for COSMOS 2166.
Object identification
Identified? True
Debris? False
Object name: COSMOS 2166
International designator: 1991-077B
Object number (NORAD): 21780
Object ID (CCSDS): 21780
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 113.975 minutes
Inclination: 82.5952 deg
SMA: 7786.92 km
Apoapsis: 1412.101 km
Periapsis: 1405.468 km
RAAN: 65.9625 deg
Eccentricy: 0.0004259
Argument of periapsis: 81.5734 deg
Mean anomaly: 338.3816 deg
Mean motion: 12.63438813 rev/day
Mean motion (dot): 0.00000019 rev/day2
B* drag term: 0.000044041379 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, 10:43 a.m. UTC
TLE line 0: 0 COSMOS 2166
TLE line 1: 1 21780U 91077B 25251.44676249 .00000019 00000-0 44041-4 0 9996
TLE line 2: 2 21780 82.5952 65.9625 0004259 81.5734 338.3816 12.63438813559596
Live tracking on map
Real-time ground track for satellite COSMOS 2166.
In-orbit conjunctions
A list of the most updated potential collisions computed for object COSMOS 2166.
Associated space launch
Second generation store-dump military communications satellite
COSMOS 2166 was lifted into orbit during the mission ‘Tsiklon-3 | Strela-3 73 to 78’, on board a Tsiklon-3 space rocket.
The launch took place on Nov. 12, 1991, 8:09 p.m. from 32/1.
For more information about the launch, click the button.
Tsiklon-3 | Strela-3 73 to 78
Agency: N/A
Status: Launch Successful
Launch date: Nov. 12, 1991, 8:09 p.m. UTC
Rocket: Tsiklon-3
Launch pad: 32/1
Location: Plesetsk Cosmodrome, Russian Federation
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