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SL-12 R/B(2) (17939)
COSPAR: 1979-087C | Alt Name: Blok DM No. 23L
Image
Additional Sources
Launch Details
Launch Date
October 3, 1979
Launch Site
Launch Pad
LC200/40
Launch Vehicle
Proton-K/DM
Orbital Elements
NORAD ID
17939
International Designator
1979-087C
Epoch
Sat, 04 Jul 2026 00:18:55 GMT
Apogee
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Perigee
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Inclination
5.29°
Right Ascension
283.19°
Eccentricity
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Argument of Perigee
352.64°
Period
1433.17 min
Mean Motion
1.00 rev/day
Latitude
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Longitude
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Altitude
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Velocity
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Polar Plot
3D Visualization
Basic Satellite Info
Name
SL-12 R/B(2)
Alternative Name
Blok DM No. 23L
Type
Rocket Body
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 17939U 79087C 26185.01313899 .00000162 00000-0 00000-0 0 9995
2 17939 5.2944 283.1929 0038991 352.6363 34.8170 1.00476630 47615
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
6.3
Diameter
3.7
Span
6.3
Dry Mass
2440
Launch Mass
17200
Shape
Cyl
Radar Cross Section
1.9952
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
11S86 No. 23L
Purpose
Unknown
Mission
Unknown
Manufacturer
NPOE
Life Expectancy
Unknown
Bus
Blok DM
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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