X Report 25 Aug 2025
SpaceX faced delays in launching its 10th Starship test flight while successfully deploying a Cargo Dragon to resupply the ISS, marking a significant milestone in the ongoing collaboration with NASA.
SL-4 R/B (21852)
COSPAR: 1992-004B | Alt Name: Soyuz-U2 No. 058 Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
January 25, 1992
Launch Site
Launch Pad
LC1
Launch Vehicle
Soyuz-U2
Orbital Elements
NORAD ID
21852
International Designator
1992-004B
Decay Date
1/26/1992
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Soyuz-U2 No. 058 Blok-I
Type
Rocket Body
Status
Space Junk
Owner
RVSNR
Country
Russia
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.
X Report 8 Jan 2025
SpaceX gears up for distinctive Starship tests and milestone Starlink deployments as the new year takes off.
Space Brief 15 Apr 2025
Today's Space Brief covers Blue Origin's historic all-female spaceflight, the selection of companies for nuclear microreactor development by DIU, and NATO's adoption of AI technology for military planning.
X Report 7 Sep 2025
SpaceX launches 24 Starlink satellites, pushing its 2025 total beyond 2,000, while facing community pushback in Florida for its Starship operations.
Who Owns SpaceX in 2026? Ownership, Valuation, and the Trillion-Dollar IPO
Elon Musk controls 79% of SpaceX's votes with just 42% of the equity - and the company just merged with his AI startup at a $1.25 trillion valuation. Here's who actually owns what, how the money works, and what a $1.75 trillion IPO means for investors.
Space Brief 31 May 2025
Today's brief covers a significant GPS satellite launch by SpaceX, China's classified satellite mission, and Rocket Lab's strategic steps in the defense sector.
X Report 20 Apr 2025
SpaceX is preparing for significant infrastructure expansion in Texas and Florida to support Starship, launches its third NRO mission in a week, and faces regulatory scrutiny from the Bahamas.
LeoLabs and the Business of Watching Everything
A startup built on Cold War-era radar science now tracks 25,000 objects in orbit - and the Pentagon can't get enough of it. But can its radars really compete with the Space Surveillance Network?