X Report 28 Jul 2025
SpaceX continues its ambitious satellite deployment schedule with two successful Starlink launches in just 24 hours, enhancing global connectivity.
SL-4 R/B (15288)
COSPAR: 1984-099B | Alt Name: Soyuz-U 46-051 Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
September 13, 1984
Launch Site
PLMSC
Launch Pad
LC43/4
Launch Vehicle
Soyuz-U
Orbital Elements
NORAD ID
15288
International Designator
1984-099B
Decay Date
9/19/1984
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Soyuz-U 46-051 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 1 Mar 2025
FAA greenlights Flight 8 of SpaceX's Starship while senators examine Air Force nominee's ties to the company.
X Report 21 Mar 2025
SpaceX achieves a historic rocket reuse milestone and successfully launches NRO satellites, alongside charming interactions during Crew-9 Dragon recovery.
X Report 23 Nov 2025
SpaceX continues its robust launch cadence with new Starlink deployments and faces challenges in Starship development following the recent damage to its prototype booster.
X Report 14 Jan 2025
SpaceX sets a new reusability record and continues its busy launch schedule with multiple Starlink missions.
X Report 26 Jun 2025
SpaceX successfully launched the Ax-4 private astronaut mission to the ISS while continuing its satellite deployment with 27 new Starlink satellites, amidst ongoing recovery efforts from the loss of Ship 36.
The Rocket That Refused to Sink
On April 18, 2014, a Falcon 9 first stage did something no orbital rocket had ever done before. It fired its engines on the way down, steered itself through the atmosphere using grid fins that did not yet exist, and touched the Atlantic Ocean softly enough to survive the impact. Nobody recovered it. The data was the whole point.
SpaceX to Launch GPS Satellite After Mission Reassigned From ULA | KeepTrack X Report
SpaceX set to launch GPS 3-9 for Space Force after strategic switch from ULA's Vulcan to Falcon 9. 25 Starlink satellites deployed to polar orbit. Musk explains SpaceX exponential growth trajectory.