Key statistics
Satellite COSMOS 939 at a glance.
Uptime
17651
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 939.
Object identification
Identified? True
Debris? False
Object name: COSMOS 939
International designator: 1977-079A
Object number (NORAD): 10282
Object ID (CCSDS): 10282
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 114.806 minutes
Inclination: 74.0259 deg
SMA: 7824.741 km
Apoapsis: 1461.723 km
Periapsis: 1431.49 km
RAAN: 13.5087 deg
Eccentricy: 0.00193183
Argument of periapsis: 3.8034 deg
Mean anomaly: 169.0518 deg
Mean motion: 12.54289447 rev/day
Mean motion (dot): 0.0 rev/day2
B* drag term: 0.00010044151 1/REarth
Two-line elements (TLE)
Creation date: Dec. 20, 2025, 3:40 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 19, 2025, 8:16 p.m. UTC
TLE line 0: 0 COSMOS 939
TLE line 1: 1 10282U 77079A 25353.84445524 .00000000 00000-0 10044-3 0 9999
TLE line 2: 2 10282 74.0259 13.5087 0019318 3.8034 169.0518 12.54289447185444
Live tracking on map
Real-time ground track for satellite COSMOS 939.
Associated space launch
High-resolution film-return Zenit reconnaissance satellite
COSMOS 939 was lifted into orbit during the mission ‘Soyuz U | Zenit-4MKM 4’, on board a Soyuz U space rocket.
The launch took place on Aug. 24, 1977, 2:29 p.m. from 43/4 (43R).
For more information about the launch, click the button.
Soyuz U | Zenit-4MKM 4
Agency: N/A
Status: Launch Successful
Launch date: Aug. 24, 1977, 2:29 p.m. UTC
Rocket: Soyuz U
Launch pad: 43/4 (43R)
Location: Plesetsk Cosmodrome, Russian Federation
...
Latest news about this satellite
There are no fresh news available about this satellite. Check back as we update our databases every day.
Newsletter sign-up
Weekly statistics, charts and insights to help you stay on top of the space industry.
