Space Brief 26 Nov 2025
Today's update covers new military space initiatives, impacts of drone threats in Europe, and advancements in secure cloud technology for NATO and Ukraine.
SL-6 R/B(2) (21199)
COSPAR: 1991-022D | Alt Name: Blok-ML No. 339
Image
Additional Sources
Launch Details
Launch Date
March 22, 1991
Launch Site
PLMSC
Launch Pad
LC43/3
Launch Vehicle
Molniya 8K78M
Orbital Elements
NORAD ID
21199
International Designator
1991-022D
Epoch
Thu, 25 Jun 2026 21:54:07 GMT
Apogee
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Perigee
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Inclination
64.47°
Right Ascension
142.79°
Eccentricity
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Argument of Perigee
251.78°
Period
699.57 min
Mean Motion
2.06 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-6 R/B(2)
Alternative Name
Blok-ML No. 339
Type
Rocket Body
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 21199U 91022D 26176.91259242 -.00000674 00000-0 00000+0 0 9999
2 21199 64.4653 142.7912 6658731 251.7812 29.4034 2.05840386264774
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
3.3
Diameter
2.3
Span
3.3
Dry Mass
900
Launch Mass
4500
Shape
Cyl
Radar Cross Section
8.0655
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Blok-ML No. 339
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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