Key statistics
Satellite COSMOS 939 at a glance.
Uptime
17604
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: 74.0243 deg
SMA: 7824.745 km
Apoapsis: 1461.333 km
Periapsis: 1431.887 km
RAAN: 77.0183 deg
Eccentricy: 0.0018816
Argument of periapsis: 77.7751 deg
Mean anomaly: 339.5289 deg
Mean motion: 12.54288622 rev/day
Mean motion (dot): -0.00000011 rev/day2
B* drag term: 0.00003119 1/REarth
Two-line elements (TLE)
Creation date: Nov. 2, 2025, 3:46 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Nov. 2, 2025, 10:41 a.m. UTC
TLE line 0: 0 COSMOS 939
TLE line 1: 1 10282U 77079A 25306.44545456 -.00000011 00000-0 31190-4 0 9997
TLE line 2: 2 10282 74.0243 77.0183 0018816 77.7751 339.5289 12.54288622179500
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
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