X Report 25 Oct 2025
SpaceX prepares for a record-setting launch of Starlink satellites, while Iridium faces challenges against SpaceX's expanding services.
SL-4 R/B (11790)
COSPAR: 1980-035B | Alt Name: Soyuz-U No. 213 Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
April 29, 1980
Launch Site
PLMSC
Launch Pad
LC43/3
Launch Vehicle
Soyuz-U
Orbital Elements
NORAD ID
11790
International Designator
1980-035B
Decay Date
5/2/1980
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Soyuz-U No. 213 Blok-I
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
6.7
Diameter
2.7
Span
6.7
Dry Mass
2350
Launch Mass
2350
Shape
Cyl
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
11S510
Purpose
Unknown
Mission
Unknown
Manufacturer
PROG
Life Expectancy
Unknown
Bus
Blok-I
Configuration
Unknown
Motor
Unknown
Equipment
Unknown
Power System
Unknown
ADCS
Unknown
Transmitter Frequency
Unknown
Satellite Articles
View All Posts »Learn more about satellites and other related topics.
Space Force Cancels OCX GPS Ground System, Space Brief 21 Apr 2026
Space Force cancels the OCX GPS ground system after RTX failures and stands up a cislunar task force. SpaceX launches the 10th and final GPS III.
Space Brief 25 Nov 2025
Today's briefing covers Chinese satellite launches, military defense strategies in space, increasing launch activity at the Space Coast, and potential rivals to SpaceX's Starlink.
X Report 18 Dec 2025
SpaceX carried out a double-header Starlink launch from both coasts while milestones from Max Space and Lux Aeterna signal growth in the commercial space sector.
Space Brief 19 Dec 2025
Today's brief highlights significant developments in space defense, innovation fund challenges, and international defense agreements impacting satellite utilities.
Space Brief 19 Nov 2024
Today's brief covers the investigation into Musk-Putin calls, SpaceX launch restrictions impacts, Pentagon's space investment strategies, ABL Space's pivot in focus, and Israel's defense export developments.
X Report 10 Sep 2025
SpaceX makes strides with United States national security satellites, securing substantial spectrum for Starlink's direct-to-cell services, and preparing for future Starship developments.
The Day Humanity Gained New Eyes on the Universe
Forty-seven years ago, a revolutionary space telescope changed our view of the cosmos, pioneering international cooperation in space-based astronomy