Key statistics
Satellite RADIO 4 at a glance.
Uptime
15974
Days in orbit
Revolutions
≈ 12.1
Per day
Orbit
LEO
Low Earth Orbit
Inclination
83.0
Latest
Satellite identification and parameters
Extended collection of information and parameters for RADIO 4.
Object identification
Identified? True
Debris? False
Object name: RADIO 4
International designator: 1981-120D
Object number (NORAD): 13000
Object ID (CCSDS): 13000
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 119.312 minutes
Inclination: 82.9621 deg
SMA: 8028.168 km
Apoapsis: 1665.428 km
Periapsis: 1634.637 km
RAAN: 212.8056 deg
Eccentricy: 0.00191769
Argument of periapsis: 30.1158 deg
Mean anomaly: 152.9483 deg
Mean motion: 12.06918907 rev/day
Mean motion (dot): 0.00000011 rev/day2
B* drag term: 0.00001558545 1/REarth
Two-line elements (TLE)
Creation date: Sept. 11, 2025, 3:57 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 10, 2025, 2:46 p.m. UTC
TLE line 0: 0 RADIO 4
TLE line 1: 1 13000U 81120D 25253.61551191 .00000011 00000-0 15585-4 0 9992
TLE line 2: 2 13000 82.9621 212.8056 0019177 30.1158 152.9483 12.06918907926429
Live tracking on map
Real-time ground track for satellite RADIO 4.
In-orbit conjunctions
There are no conjunctions computed for RADIO 4, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
6 Soviet amateur radio satellites
RADIO 4 was lifted into orbit during the mission ‘Kosmos-3M | Radio Sputnik 3 to 8’, on board a Kosmos-3M space rocket.
The launch took place on Dec. 17, 1981, 11 a.m. from 132/2.
For more information about the launch, click the button.
Kosmos-3M | Radio Sputnik 3 to 8
Agency: N/A
Status: Launch Successful
Launch date: Dec. 17, 1981, 11 a.m. UTC
Rocket: Kosmos-3M
Launch pad: 132/2
Location: Plesetsk Cosmodrome, Russian Federation
...
Latest news about this satellite
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