Key statistics
Satellite SL-12 R/B(2) at a glance.
Uptime
18726
Days in orbit
Revolutions
≈ 1.0
Per day
Orbit
GEO
Geostationary Orbit
Inclination
1.9
Latest
Satellite identification and parameters
Extended collection of information and parameters for SL-12 R/B(2).
Object identification
Identified? True
Debris? False
Object name: SL-12 R/B(2)
International designator: 1974-060F
Object number (NORAD): 20836
Object ID (CCSDS): 20836
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 1434.711 minutes
Inclination: 1.9276 deg
SMA: 42137.608 km
Apoapsis: 35823.35 km
Periapsis: 35695.597 km
RAAN: 257.7661 deg
Eccentricy: 0.0015159
Argument of periapsis: 223.7922 deg
Mean anomaly: 274.4629 deg
Mean motion: 1.00368617 rev/day
Mean motion (dot): -0.00000115 rev/day2
B* drag term: 0.0 1/REarth
Two-line elements (TLE)
Creation date: Nov. 3, 2025, 11:16 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Nov. 3, 2025, 6:23 p.m. UTC
TLE line 0: 0 SL-12 R/B(2)
TLE line 1: 1 20836U 74060F 25307.76623686 -.00000115 00000-0 00000+0 0 9994
TLE line 2: 2 20836 1.9276 257.7661 0015159 223.7922 274.4629 1.00368617 43742
Live tracking on map
Real-time ground track for satellite SL-12 R/B(2).
Associated space launch
First operational geostationary communications satellite of the Soviet Union
SL-12 R/B(2) was lifted into orbit during the mission ‘Proton-K/DM | Molniya-1S’, on board a Proton-K/DM space rocket.
The launch took place on July 29, 1974, noon from 81/24 (81P).
For more information about the launch, click the button.
Proton-K/DM | Molniya-1S
Agency: N/A
Status: Launch Successful
Launch date: July 29, 1974, noon UTC
Rocket: Proton-K/DM
Launch pad: 81/24 (81P)
Location: Baikonur Cosmodrome, Republic of Kazakhstan
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