X Report 14 Dec 2024
SpaceX advances with Starship readiness, scrubs mysterious RRT-1 launch, and successfully deploys more Starlink satellites.
SL-4 R/B (11361)
COSPAR: 1979-041B | Alt Name: Soyuz-U 55-048 Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
May 17, 1979
Launch Site
PLMSC
Launch Pad
LC43/4
Launch Vehicle
Soyuz-U
Orbital Elements
NORAD ID
11361
International Designator
1979-041B
Decay Date
5/21/1979
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Soyuz-U 55-048 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.
X Report 2 Feb 2025
SpaceX successfully launched 43 Starlink satellites across two missions, marking significant achievements at Cape Canaveral and Vandenberg Space Force Bases.
Space Force Stands Up SPACEFOR-NORTH for Homeland Defense | KeepTrack Space Brief
Space Force inaugurates SPACEFOR-NORTH at Peterson SFB for homeland defense. Viridian inks AFRL satellite agreement. HASC chair seeks $450B defense fund.
X Report 29 Sep 2025
In today's update, SpaceX successfully launched 28 Starlink satellites from Vandenberg, while Italy grapples with its satellite strategy amid rising reliance on Starlink services.
Rheinmetall Weighs Bid for Mynaric Amid Rocket Lab Acquisition | KeepTrack Space Brief
German defense giant Rheinmetall may bid for laser-comm firm Mynaric, challenging Rocket Lab's plans. SpaceX sets Falcon 9 reuse record. Juno reveals Europa ice sheet data.
Space Brief 18 Jan 2025
In today's brief: high-profile personnel changes in the Space Force, the inclusion of Space Force in historical political events, and strategic shifts in defense highlighted with a focus on satellite applications.
Blue Origin's New Glenn Explodes During Ground Test | KeepTrack Space Brief
Blue Origin's New Glenn rocket exploded during ground testing May 28, visible from hundreds of miles across Florida. Fireball halts vehicle pending failure investigation.
Space Brief 23 Apr 2025
Today's brief highlights the US Space Force's new space conflict doctrine, Ukraine's search for Starlink alternatives, and updates on regional military activities affecting space dynamics.