Key statistics
Satellite SL-3 R/B at a glance.
Uptime
16100
Days in orbit
Revolutions
≈ 14.2
Per day
Orbit
LEO
Low Earth Orbit
Inclination
81.2
Latest
Satellite identification and parameters
Extended collection of information and parameters for SL-3 R/B.
Object identification
Identified? True
Debris? False
Object name: SL-3 R/B
International designator: 1981-075B
Object number (NORAD): 12646
Object ID (CCSDS): 12646
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 101.669 minutes
Inclination: 81.2275 deg
SMA: 7215.844 km
Apoapsis: 886.869 km
Periapsis: 788.548 km
RAAN: 195.6572 deg
Eccentricy: 0.00681282
Argument of periapsis: 58.2846 deg
Mean anomaly: 105.1652 deg
Mean motion: 14.16354936 rev/day
Mean motion (dot): 0.00000232 rev/day2
B* drag term: 0.00010802561 1/REarth
Two-line elements (TLE)
Creation date: Sept. 4, 2025, 10:13 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 4, 2025, 7:06 a.m. UTC
TLE line 0: 0 SL-3 R/B
TLE line 1: 1 12646U 81075B 25247.29625082 .00000232 00000-0 10803-3 0 9996
TLE line 2: 2 12646 81.2275 195.6572 0068128 58.2846 105.1652 14.16354936276231
Live tracking on map
Real-time ground track for satellite SL-3 R/B.
In-orbit conjunctions
A list of the most updated potential collisions computed for object SL-3 R/B.
Associated space launch
Interkosmos satellite research satellite carrying scientific experiments designed and built in Bulgaria
SL-3 R/B was lifted into orbit during the mission ‘Vostok 8A92M | Bulgaria 1300’, on board a Vostok 8A92M space rocket.
The launch took place on Aug. 7, 1981, 1:35 p.m. from 43/3 (43L).
For more information about the launch, click the button.
Vostok 8A92M | Bulgaria 1300
Agency: N/A
Status: Launch Successful
Launch date: Aug. 7, 1981, 1:35 p.m. UTC
Rocket: Vostok 8A92M
Launch pad: 43/3 (43L)
Location: Plesetsk Cosmodrome, Russian Federation
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