Space Brief 8 Jul 2025
Today's highlights include the cancellation of Starship landing plans, Planet Labs' defense expansion, and cutting-edge radiation-hardened tech for space and defense.
SL-6 R/B(2) (11551)
COSPAR: 1979-031D | Alt Name: Blok-L
DECAYED
Image
Additional Sources
Launch Details
Launch Date
April 12, 1979
Launch Site
PLMSC
Launch Pad
LC41/1
Launch Vehicle
Molniya 8K78M
Orbital Elements
NORAD ID
11551
International Designator
1979-031D
Decay Date
6/30/1990
Basic Satellite Info
Name
SL-6 R/B(2)
Alternative Name
Blok-L
Type
Rocket Body
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
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
16.8835
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Blok-L
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
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