Space Brief 21 May 2025
Today's Space Brief covers significant events including a high-stakes missile defense program, recent Chinese satellite launches, military defense initiatives, and key profiles in defense leadership.
SL-4 R/B (08443)
COSPAR: 1975-108B | Alt Name: Voskhod 16-213 Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
November 21, 1975
Launch Site
Launch Pad
LC31
Launch Vehicle
Voskhod 11A57
Orbital Elements
NORAD ID
08443
International Designator
1975-108B
Decay Date
11/27/1975
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Voskhod 16-213 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
11A57I
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 22 Mar 2025
SpaceX achieves its 450th Falcon 9 launch, setting a new turnaround record, while its competitor ULA remains grounded, awaiting clearance from the Space Force.
The Day Humanity Gained New Eyes on the Sun
Fifteen years ago, NASA launched its most advanced solar observatory, revolutionizing our understanding of our star and transforming space weather prediction
NASA Declares MAVEN Dead; Eastern Range Damage Assessment Underway | KeepTrack Space Brief
NASA officially ended the MAVEN Mars orbiter mission after months of radio silence following an anomaly. Space Force assessing Eastern Range damage from separate incident affecting launch cadence.
X Report 22 Aug 2025
SpaceX successfully launched the U.S. Space Force's eighth X-37B spaceplane mission while preparing for an upcoming Starship launch. Meanwhile, the company continues to expand its Starlink satellite constellation.
Congress Passes FY2026 Bill Reinstating NASA Funding, Slingshot Wins $27M AI Contract | KeepTrack Space Brief
Congress passes FY2026 spending bill reinstating NASA funding. Slingshot Aerospace wins $27M Space Force contract for AI satellite training. Portal Space selects Atomic-6 debris shield for 2026 mission.
Space Brief 29 Aug 2025
Today's Space Brief highlights emerging technologies in space, a contract for U.S. Space Force missions, developments in military operations, and updates on drone advancements.
X Report 22 Dec 2024
SpaceX successfully launches two rideshare missions to mid-inclination orbits, expanding their satellite deployment capabilities.