Space Brief 17 May 2025
Today's brief covers SES's satellite orchestration, SpaceX's defense role, cyber scorecards in DoD, and more.
SL-4 DEB (09393)
COSPAR: 1976-086C | Alt Name: Sensor cover
DECAYED
Image
Additional Sources
Launch Details
Launch Date
August 28, 1976
Launch Site
Launch Pad
LC31
Launch Vehicle
Soyuz-U
Orbital Elements
NORAD ID
09393
International Designator
1976-086C
Decay Date
8/29/1976
Explore in the Catalog
Basic Satellite Info
Name
SL-4 DEB
Alternative Name
Sensor cover
Type
Debris
Status
Space Junk
Owner
GUKOSR
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Summary
Space debris, also known as space junk, encompasses all non-functional objects orbiting Earth such as defunct satellites, spent rocket stages, and fragments from collisions or disintegrations. Over time, this debris can accumulate and create an increasingly hazardous environment in orbit. Even tiny fragments, traveling at extremely high velocities, can inflict significant damage on operational satellites and spacecraft. If left unmanaged, the density of debris raises the risk of catastrophic collisions and further fragmentation, compounding the problem and threatening the safety and sustainability of space activities.
Physical Characteristics
Length
0
Diameter
0
Span
0
Dry Mass
0
Launch Mass
0
Shape
N/A
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Zenit-4MK sensor cover
Purpose
Unknown
Mission
Unknown
Manufacturer
TSSKB
Life Expectancy
Unknown
Bus
Zenit deb
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.
Object 100000 and the Sky That Outgrew Its Catalog
On July 11, 2026, a Portuguese satellite named after a Nobel laureate became the first object to carry catalog number 100000. It broke a five-digit numbering limit that had held since Sputnik, and exposed how unprepared decades of tracking software is for a sky this crowded.
White House Orders Space Nuclear Power by 2028 | KeepTrack Space Brief
White House directs NASA and Pentagon to field space nuclear power systems by 2028, with DoD demonstration required by 2031. Game-changer for military satellite power budgets.
X Report 23 Oct 2025
SpaceX continues to break records with its Falcon 9 missions while facing public scrutiny from Elon Musk regarding NASA's leadership. Meanwhile, satellite spectrum battles heat up as Lynk Global and Omnispace prepare to merge.
X Report 4 Jan 2025
SpaceX kicks off 2025 with successful launches and a record-breaking outlook, aiming to maintain its market leadership amidst emerging competition.
X Report 10 Feb 2025
SpaceX prepares for Starship Flight 8 with successful booster static fire; Starlink continues its expansion.
The Day a Jupiter-Bound Spacecraft Traveled Past Venus
Thirty-five years ago, NASA's Galileo spacecraft made a crucial flyby of Venus, pioneering a complex path through the inner solar system that would revolutionize planetary exploration
Starship V3 Flight 12 Four Weeks Out, X Report 11 Mar 2026
Starship V3 timeline: Musk puts Flight 12 about 4 weeks out, early to mid April 2026. SpaceX also hit 30 missions of 2026 with the 15,000-lb EchoStar 25.