Key statistics
Satellite COSMOS 991 at a glance.
Uptime
17456
Days in orbit
Revolutions
≈ 13.8
Per day
Orbit
LEO
Low Earth Orbit
Inclination
83.0
Latest
Satellite identification and parameters
Extended collection of information and parameters for COSMOS 991.
Object identification
Identified? True
Debris? False
Object name: COSMOS 991
International designator: 1978-022A
Object number (NORAD): 10692
Object ID (CCSDS): 10692
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 104.609 minutes
Inclination: 82.9887 deg
SMA: 7354.275 km
Apoapsis: 1003.972 km
Periapsis: 948.308 km
RAAN: 23.6373 deg
Eccentricy: 0.00378449
Argument of periapsis: 88.3773 deg
Mean anomaly: 30.7567 deg
Mean motion: 13.76553056 rev/day
Mean motion (dot): 0.00000066 rev/day2
B* drag term: 0.000050925359 1/REarth
Two-line elements (TLE)
Creation date: Dec. 14, 2025, 3:07 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 13, 2025, 2:43 p.m. UTC
TLE line 0: 0 COSMOS 991
TLE line 1: 1 10692U 78022A 25347.61333935 .00000066 00000-0 50925-4 0 9998
TLE line 2: 2 10692 82.9887 23.6373 0037845 88.3773 30.7567 13.76553056399841
Live tracking on map
Real-time ground track for satellite COSMOS 991.
In-orbit conjunctions
A list of the most updated potential collisions computed for object COSMOS 991.
Associated space launch
Navigation satellite providing location information for the Tsiklon-B navigation system
COSMOS 991 was lifted into orbit during the mission ‘Kosmos-3M | Parus 13’, on board a Kosmos-3M space rocket.
The launch took place on Feb. 28, 1978, 6:43 a.m. from 132/2.
For more information about the launch, click the button.
Kosmos-3M | Parus 13
Agency: N/A
Status: Launch Successful
Launch date: Feb. 28, 1978, 6:43 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 132/2
Location: Plesetsk Cosmodrome, Russian Federation
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