X Report 11 Jan 2025
Starship Flight 7 scheduled for Jan 13, SpaceX sets Falcon 9 record, and NRO expands spy satellite constellation.
SL-4 R/B (16590)
COSPAR: 1986-013B | Alt Name: Soyuz-U 11-208 Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
February 7, 1986
Launch Site
Launch Pad
LC1
Launch Vehicle
Soyuz-U
Orbital Elements
NORAD ID
16590
International Designator
1986-013B
Decay Date
2/9/1986
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Soyuz-U 11-208 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.
Starship V3 Targets May 19 on New Pad 2 | KeepTrack X Report
SpaceX targets May 19 for Starship V3's debut from Launch Pad 2, while the FCC approves a $2.4B EchoStar spectrum deal for Starlink.
Space Brief 22 Sep 2025
Today's edition highlights the operational deployment of HawkEye 360's Cluster 12, Shandong's record satellite launch, Planet Labs' latest imaging achievements, SpaceX's Starlink launches, and more.
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.
Space Brief 25 Sep 2025
Discover the latest developments in space defense, innovative satellite technologies, nuclear advancements in space travel, and strategic military updates.
China's Long March 10C Nails First Booster Recovery | KeepTrack Space Brief
China successfully recovered a Long March 10C first stage booster, positioning the methalox rocket as its primary commercial launcher. Reusable boosters reshape Beijing's LEO constellation strategy.
X Report 24 Oct 2025
SpaceX achieves a new milestone with its record 139th launch of the year while competition heats up in satellite communications.
X Report 15 May 2025
SpaceX successfully launched 28 Starlink satellites from Cape Canaveral, while Starship prepares for its ninth test flight next week.