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SL-3 R/B (12904)
COSPAR: 1981-103B | Alt Name: Vostok-2M (N81) Stage 3
Image
Additional Sources
Launch Details
Launch Date
October 13, 1981
Launch Site
PLMSC
Launch Pad
LC43/3
Launch Vehicle
Vostok 8A92M
Orbital Elements
NORAD ID
12904
International Designator
1981-103B
Epoch
Sat, 04 Jul 2026 03:26:26 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
81.16°
Right Ascension
76.71°
Eccentricity
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Argument of Perigee
252.39°
Period
94.59 min
Mean Motion
15.22 rev/day
Latitude
Calculating...
Longitude
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Altitude
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Velocity
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Polar Plot
3D Visualization
Basic Satellite Info
Name
SL-3 R/B
Alternative Name
Vostok-2M (N81) Stage 3
Type
Rocket Body
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 12904U 81103B 26185.14336310 .00004828 00000-0 20746-3 0 9996
2 12904 81.1579 76.7114 0011537 252.3942 107.6031 15.22423109990947
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
3.8
Diameter
2.6
Span
3.8
Dry Mass
1440
Launch Mass
1440
Shape
Cyl
Radar Cross Section
5.3523
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
8A92ME
Purpose
Unknown
Mission
Unknown
Manufacturer
PROG
Life Expectancy
Unknown
Bus
Blok-E
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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