Starlink Mobile US Plan, Ship 40 Static Fire, X Report 27 Jun 2026
Starlink mobile service is planned for the US as SpaceX fires Ship 40's single Raptor in a prelaunch test, with 10,689 Starlink satellites working.
SL-12 R/B (07950)
COSPAR: 1975-054B | Alt Name: D-1-2L SOZ-1
DECAYED
Image
Additional Sources
Launch Details
Launch Date
June 14, 1975
Launch Site
Launch Pad
LC81/24
Launch Vehicle
Proton-K/D
Orbital Elements
NORAD ID
07950
International Designator
1975-054B
Decay Date
6/15/1975
Basic Satellite Info
Name
SL-12 R/B
Alternative Name
D-1-2L SOZ-1
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
1
Diameter
0.6
Span
1
Dry Mass
56
Launch Mass
110
Shape
Cyl
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
SOZ
Purpose
Unknown
Mission
Unknown
Manufacturer
NPOE
Life Expectancy
Unknown
Bus
SOZ
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.
SpaceX Preps Starlink 6-96 Launch, Starship TPS Testing Continues at Starbase | KeepTrack X Report
SpaceX readies Starlink 6-96 launch of 29 satellites from Cape Canaveral. Thermal Protection System evaluations underway at Starbase for next Starship prototypes. SpaceX IPO expected to reshape market.
SpinLaunch's Kinetic Launch System
How a California startup's massive centrifuge could transform space access by eliminating rocket fuel, reducing costs by 70%, and enabling daily satellite launches - if it can overcome the physics of scaling from suborbital tests to orbital reality
Space Brief 11 May 2025
Discover the latest innovations from Rocket Lab, new developments in hypersonic flight, and significant advances in satellite technology with BlackSky. Gain insights into the Space Force's mission and MIT physicists' breakthroughs in observing atoms.
Space Brief 25 Oct 2024
Today's highlights include Crew-8's return amid weather delays, new space tourism announcements by Deep Blue Aerospace, and Europe's efforts to combat space debris. Plus, another successful SpaceX launch and the ESA backed Zero Debris Charter gains international traction.
SpaceX Files $18.7B IPO as Starship V3 Debuts | KeepTrack X Report
SpaceX's S-1 reveals $18.7B in revenue as Starship Flight 12 debuts Block 3 hardware from Pad 2 on May 21, 2026.
Space Brief 15 Jun 2025
Today’s highlights focus on the launch preparations for the Dragoon Mission, China’s seismo-electromagnetic satellite launch, NASA budget cut impacts, and a major expansion by American Pacific Corporation.
X Report 2 Jun 2025
SpaceX delays the launch of 23 Starlink satellites due to geomagnetic storm concerns, adjusting the schedule for an upcoming Falcon 9 mission.