Key statistics
Satellite RADIO 4 at a glance.
Uptime
15914
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: 82.9588 deg
SMA: 8028.184 km
Apoapsis: 1665.511 km
Periapsis: 1634.587 km
RAAN: 246.1868 deg
Eccentricy: 0.001926
Argument of periapsis: 150.2268 deg
Mean anomaly: 220.5998 deg
Mean motion: 12.0691525 rev/day
Mean motion (dot): -0.00000093 rev/day2
B* drag term: -0.0011618 1/REarth
Two-line elements (TLE)
Creation date: July 11, 2025, 6:37 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 11, 2025, 9:34 a.m. UTC
TLE line 0: 0 RADIO 4
TLE line 1: 1 13000U 81120D 25192.39921351 -.00000093 00000-0 -11618-2 0 9991
TLE line 2: 2 13000 82.9588 246.1868 0019260 150.2268 220.5998 12.06915250919042
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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