Key statistics
Satellite SL-3 R/B at a glance.
Uptime
16039
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: 101.67 minutes
Inclination: 81.2256 deg
SMA: 7215.877 km
Apoapsis: 885.543 km
Periapsis: 789.942 km
RAAN: 255.4777 deg
Eccentricy: 0.0066243
Argument of periapsis: 230.6033 deg
Mean anomaly: 238.0305 deg
Mean motion: 14.16344943 rev/day
Mean motion (dot): 0.00000093 rev/day2
B* drag term: 0.000039718 1/REarth
Two-line elements (TLE)
Creation date: July 5, 2025, 5:45 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 5, 2025, 2:27 p.m. UTC
TLE line 0: 0 SL-3 R/B
TLE line 1: 1 12646U 81075B 25186.60258475 .00000093 00000-0 39718-4 0 9993
TLE line 2: 2 12646 81.2256 255.4777 0066243 230.6033 238.0305 14.16344943267645
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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