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.
SL-12 PLAT (25926)
COSPAR: 1999-053C | Alt Name: Perekhodnik
DECAYED
Image
Additional Sources
Launch Details
Launch Date
September 26, 1999
Launch Site
Launch Pad
LC81/23
Launch Vehicle
Proton-K/DM-2M
Orbital Elements
NORAD ID
25926
International Designator
1999-053C
Decay Date
9/27/1999
Basic Satellite Info
Name
SL-12 PLAT
Alternative Name
Perekhodnik
Type
Debris
Status
Space Junk
Owner
KHRR
Country
Russia
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
4
Diameter
3.7
Span
4
Dry Mass
800
Launch Mass
800
Shape
Cyl
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Sredniy perekhodnik
Purpose
Unknown
Mission
Unknown
Manufacturer
RKKE
Life Expectancy
Unknown
Bus
Adapter
Configuration
Unknown
Motor
Unknown
Equipment
Unknown
Power System
Unknown
ADCS
Unknown
Transmitter Frequency
Unknown
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