Falcon 9 Grounding Threatens ISS Crew Rotation Schedule | KeepTrack X Report
Falcon 9 stand-down may impact next ISS crew rotation as NASA monitors the situation. Musk merges xAI into SpaceX to build space data centers. 9,633 Starlink sats on orbit.
SL-4 R/B (37727)
COSPAR: 2011-028B | Alt Name: Soyuz-U-PVB 12-222 Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
June 27, 2011
Launch Site
PLMSC
Launch Pad
LC16/2
Launch Vehicle
Soyuz-U-PVB
Orbital Elements
NORAD ID
37727
International Designator
2011-028B
Decay Date
7/1/2011
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Soyuz-U-PVB 12-222 Blok-I
Type
Rocket Body
Status
Space Junk
Owner
KVR
Country
Russia
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
5.0119
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
11S510
Purpose
Unknown
Mission
Unknown
Manufacturer
PROGT
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.
Space Brief 10 Dec 2025
Today's brief covers China's intense launch schedule, a new Arctic military constellation, Muon Space's defense innovations, and SpaceX's classified NROL-77 mission.
Space Force Awards $1.8B Andromeda Program to 14 Firms | KeepTrack Space Brief
Space Force selects 14 companies for $1.8 billion Andromeda program to replace GSSAP geosynchronous surveillance satellites with commercial alternatives through 2036.
SpaceX to Lower 4,400 Starlink Satellite Orbits for Space Safety | KeepTrack X Report
SpaceX plans to lower orbits of 4,400 Starlink satellites after two collision-concern incidents. Cosmo-SkyMed Earth observation satellite launched for Italy from Vandenberg.
Apogee and Perigee
Understanding the high and low points of every orbit - from the International Space Station's careful dance with Earth's atmosphere to the extreme ellipses that take satellites to the edge of space and back.
X Report 3 Mar 2025
SpaceX gears up for Starship Flight 8, with a launch set for Monday as final preparations are underway.
X Report 29 Jun 2025
SpaceX secures a significant military contract while successfully launching multiple batches of Starlink satellites. Furthermore, milestones aboard the ISS highlight ongoing space missions.
GAO Flags Risks in SDA Missile-Tracking Satellites, Lawmakers Push GPS Anti-Jam | KeepTrack Space Brief
GAO warns SDA missile-tracking satellite program overestimates tech readiness. SPACECOM pushes expanded on-orbit warfighting exercises. Congress advocates for enhanced GPS anti-jam capabilities.