Key statistics
Satellite SL-3 R/B at a glance.
Uptime
12526
Days in orbit
Revolutions
≈ 14.0
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
99.5
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: 1991-061B
Object number (NORAD): 21689
Object ID (CCSDS): 21689
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 102.691 minutes
Inclination: 99.4617 deg
SMA: 7264.104 km
Apoapsis: 904.208 km
Periapsis: 867.731 km
RAAN: 187.8187 deg
Eccentricy: 0.00251082
Argument of periapsis: 227.3354 deg
Mean anomaly: 132.5695 deg
Mean motion: 14.02263553 rev/day
Mean motion (dot): 0.00000011 rev/day2
B* drag term: 0.000038107115 1/REarth
Two-line elements (TLE)
Creation date: Dec. 14, 2025, 3:07 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 13, 2025, 12:12 p.m. UTC
TLE line 0: 0 SL-3 R/B
TLE line 1: 1 21689U 91061B 25347.50851117 .00000011 00000-0 38107-4 0 9997
TLE line 2: 2 21689 99.4617 187.8187 0025108 227.3354 132.5695 14.02263553754037
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
Indian remote sensing satellite
SL-3 R/B was lifted into orbit during the mission ‘Vostok 8A92M | IRS-1B’, on board a Vostok 8A92M space rocket.
The launch took place on Aug. 29, 1991, 6:48 a.m. from 31/6.
For more information about the launch, click the button.
Vostok 8A92M | IRS-1B
Agency: N/A
Status: Launch Successful
Launch date: Aug. 29, 1991, 6:48 a.m. UTC
Rocket: Vostok 8A92M
Launch pad: 31/6
Location: Baikonur Cosmodrome, Republic of Kazakhstan
...
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