Reentry
What happens when space objects come home: the fiery physics of returning from orbit and why predicting where debris lands is so difficult
SL-4 R/B (36604)
COSPAR: 2010-029B | Alt Name: Soyuz-FG No. 032 Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
June 15, 2010
Launch Site
Launch Pad
LC1
Launch Vehicle
Soyuz-FG
Orbital Elements
NORAD ID
36604
International Designator
2010-029B
Decay Date
6/19/2010
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Soyuz-FG No. 032 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
4.729
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.
X Report 30 Aug 2025
SpaceX impresses with the successful launch of 24 Starlink satellites and shares stunning visuals from the recent Starship Flight 10, which demonstrated remarkable landing precision.
Starship V3 Debuts Flight 12 With First-Ever Self-Imaging Maneuver | KeepTrack X Report
SpaceX's Starship V3 targets Flight 12 with an unprecedented self-inspection maneuver, while Delta Air Lines walks away from Starlink inflight Wi-Fi.
Space Brief 9 Dec 2025
Today's edition covers significant military space developments, including DIU tech consolidation discussions, NDAA budget expansions, and new military commands.
Starlink Powers Air Force One; Pentagon Orders 10,000 Cruise Missiles | KeepTrack Space Brief
Starlink confirmed operational aboard Air Force One over Pacific. Pentagon awards 10,000 low-cost cruise missiles to 4 contractors under new LCCMP program.
Starlink-34343 | The Second Fragmentation Event in Three Months
STARLINK-34343 broke apart at 560 kilometers. SpaceX's response - launch more satellites the next morning - tells you everything about the confidence gap between fleet statistics and individual failure modes.
China's 75 Unusual GEO Maneuvers Flagged by CSIS | KeepTrack Space Brief
CSIS analysis identifies 75 unusual orbital maneuvers by Chinese GEO satellites over 10 years, consistent with military reconnaissance. Track GEO objects via KeepTrack.
X Report 4 Oct 2025
SpaceX continues to push forward with significant milestones, including the launch of additional Starlink satellites and progress on spectrum acquisitions.