Space Brief 22 Aug 2025
SpaceX's X-37B spaceplane launch, featuring advanced tech, highlights today’s space events. The launch of the first reprogrammable navigation satellite by the US Space Force is another significant milestone.
SL-4 R/B (05087)
COSPAR: 1971-023B | Alt Name: Voskhod (N149) Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
March 27, 1971
Launch Site
PLMSC
Launch Pad
LC43/4
Launch Vehicle
Voskhod 11A57
Orbital Elements
NORAD ID
05087
International Designator
1971-023B
Decay Date
4/2/1971
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Voskhod (N149) 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.
Starship Flight 13 Targets July 16 Launch | KeepTrack X Report
SpaceX targets July 16 for Starship Flight 13 from Starbase, aiming to fix Flight 12 issues and deploy working Starlink satellites.
X Report 30 Nov 2025
SpaceX successfully launched the Transporter-15 mission, deploying 140 payloads, while Elon Musk addressed media narratives related to Starlink's humanitarian efforts following recent disasters.
X Report 17 Apr 2025
Starbase expansion progresses and Germany eyes its own satellite constellation.
US Agency Will Not Reinstate $900 Mln Subsidy for SpaceX Starlink Unit
The U.S. Federal Communications Commission reaffirms its decision to deny SpaceX's Starlink unit $885.5 million in rural broadband subsidies, impacting the company's plans for expanding internet access.
Space Brief 18 Sep 2025
Today's coverage includes China's recent satellite launch, the Space Force's challenges with current tracking capabilities, and advancements in nuclear propulsion from Ohio State.
Falcon 9 Lands in Bahamas for 2nd Time, Reentry Pollution Measured | KeepTrack X Report
SpaceX lands Falcon 9 in The Bahamas for the second time ever during Starlink 10-34 mission. Scientists measure rocket reentry air pollution in real-time for the first time.
SpaceX Valued at $1.25T as IPO Signals Intensify | KeepTrack X Report
SpaceX hits a $1.25 trillion valuation as IPO speculation mounts, Starlink 17-17 lifts off from Vandenberg, and a quantum sensor rides to orbit.