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SL-6 R/B(2) (12311)
COSPAR: 1981-016E | Alt Name: Blok-2BL 55-639
Image
Additional Sources
Launch Details
Launch Date
February 19, 1981
Launch Site
PLMSC
Launch Pad
LC16/2
Launch Vehicle
Molniya 8K78M
Orbital Elements
NORAD ID
12311
International Designator
1981-016E
Epoch
Sat, 04 Jul 2026 08:21:53 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
71.55°
Right Ascension
26.90°
Eccentricity
Calculating...
Argument of Perigee
314.13°
Period
703.58 min
Mean Motion
2.05 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Polar Plot
3D Visualization
Basic Satellite Info
Name
SL-6 R/B(2)
Alternative Name
Blok-2BL 55-639
Type
Rocket Body
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 12311U 81016E 26185.34853400 .00000481 00000+0 00000+0 0 9994
2 12311 71.5496 26.8986 5466265 314.1314 12.1492 02.04667099339166
Source: Celestrak
Summary
A rocket body, also commonly referred to as an upper stage or spent rocket stage, is the structural shell left behind after a rocket has delivered its payload to orbit. These large and often heavy pieces of space hardware can remain in orbit for years, posing significant collision hazards as part of the growing space debris problem. If left uncontrolled, rocket bodies have the potential to reenter Earth's atmosphere unpredictably, which can lead to falling debris in populated areas. Additionally, they risk colliding with operational satellites or the International Space Station, creating more debris and putting human life at risk.
Physical Characteristics
Length
2.7
Diameter
2.5
Span
2.7
Dry Mass
1000
Launch Mass
4500
Shape
Cyl
Radar Cross Section
5.46
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Blok-2BL No. 71655-639
Purpose
Unknown
Mission
Unknown
Manufacturer
NPOE
Life Expectancy
Unknown
Bus
Blok-L
Configuration
Unknown
Motor
Unknown
Equipment
Unknown
Power System
Unknown
ADCS
Unknown
Transmitter Frequency
Unknown
Map
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration
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