Key statistics
Satellite SL-12 R/B(2) at a glance.
Uptime
12790
Days in orbit
Revolutions
≈ 2.1
Per day
Orbit
MEO
Medium Earth Orbit
Inclination
64.8
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: 1990-110F
Object number (NORAD): 21011
Object ID (CCSDS): 21011
Country: COMMONWEALTH OF INDEPENDENT STATES (CIS)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 675.227 minutes
Inclination: 64.8253 deg
SMA: 25495.289 km
Apoapsis: 19131.953 km
Periapsis: 19102.355 km
RAAN: 76.891 deg
Eccentricy: 0.00058044
Argument of periapsis: 246.5694 deg
Mean anomaly: 109.987 deg
Mean motion: 2.13261693 rev/day
Mean motion (dot): -0.00000034 rev/day2
B* drag term: 0.0 1/REarth
Two-line elements (TLE)
Creation date: Dec. 11, 2025, 7:14 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 11, 2025, 8:43 a.m. UTC
TLE line 0: 0 SL-12 R/B(2)
TLE line 1: 1 21011U 90110F 25345.36364412 -.00000034 00000-0 00000-0 0 9992
TLE line 2: 2 21011 64.8253 76.8910 0005804 246.5694 109.9870 2.13261693272681
Live tracking on map
Real-time ground track for satellite SL-12 R/B(2).
In-orbit conjunctions
A list of the most updated potential collisions computed for object SL-12 R/B(2).
Associated space launch
GLONASS navigation satellites
SL-12 R/B(2) was lifted into orbit during the mission ‘Proton | Uragan 39 to 41’, on board a Proton space rocket.
The launch took place on Dec. 8, 1990, 2:43 a.m. from 200/40.
For more information about the launch, click the button.
Proton | Uragan 39 to 41
Agency: N/A
Status: Launch Successful
Launch date: Dec. 8, 1990, 2:43 a.m. UTC
Rocket: Proton
Launch pad: 200/40
Location: Baikonur Cosmodrome, Republic of Kazakhstan
...
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