X Report 8 Apr 2025
SpaceX announces massive contract awards, advances Starship reusability, and continues to dominate with Starlink deployments.
SL-4 R/B (04127)
COSPAR: 1969-087B | Alt Name: Soyuz No. 18 Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
October 13, 1969
Launch Site
Launch Pad
LC31
Launch Vehicle
Soyuz 11A511
Orbital Elements
NORAD ID
04127
International Designator
1969-087B
Decay Date
10/16/1969
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Soyuz No. 18 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.
Ku-Band
The frequency band that brought satellite TV to small dishes on rooftops and revolutionized direct-to-home broadcasting
X Report 3 Sep 2025
SpaceX successfully launched 24 Starlink satellites aboard a brand-new Falcon 9 rocket. The company aims for five missions this week, bolstering its satellite internet constellation.
Atlas 5 Retires After Final 551 Flight to Amazon Kuiper | KeepTrack Space Brief
ULA launches the final Atlas 5 551 configuration—its heaviest variant with 5 solid boosters—carrying Amazon's Project Kuiper satellite to low Earth orbit from Cape Canaveral.
Space Brief 25 Oct 2025
Today's brief covers significant growth forecasts for global defense satellite communications, the integration of hypersonic missiles, cyber authority expansion in the Army, and more pivotal military developments.
Track the International Space Station
A look at how tracking the space station offers a unique view of space exploration.
SpaceX Buys Cursor AI for $60B After IPO, X Report 17 Jun 2026
SpaceX acquires Cursor AI maker Anysphere for $60B in its first post-IPO deal, as Falcon 9 lofts 3 Block 2 BlueBird satellites for AST SpaceMobile.
Space Brief 26 Nov 2024
Today's headlines include new launch schedules, military industrial base challenges, and NASA's exploration of historic Cold War sites. Discover significant space events and satellite insights.