Key statistics
Satellite COSMOS 939 at a glance.
Uptime
17549
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: 74.0254 deg
SMA: 7824.752 km
Apoapsis: 1461.614 km
Periapsis: 1431.619 km
RAAN: 149.7817 deg
Eccentricy: 0.00191664
Argument of periapsis: 162.4966 deg
Mean anomaly: 313.0301 deg
Mean motion: 12.54287027 rev/day
Mean motion (dot): 0.00000016 rev/day2
B* drag term: 0.00019810563 1/REarth
Two-line elements (TLE)
Creation date: Sept. 9, 2025, 10:35 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 9, 2025, 3:30 a.m. UTC
TLE line 0: 0 COSMOS 939
TLE line 1: 1 10282U 77079A 25252.14638167 .00000016 00000-0 19811-3 0 9995
TLE line 2: 2 10282 74.0254 149.7817 0019166 162.4966 313.0301 12.54287027172695
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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