X Report 3 Oct 2025
SpaceX continues to expand its reach with the successful launch of more Starlink satellites while exploring innovative military applications for satellite communications.
SL-6 R/B(2) (15439)
COSPAR: 1984-124H | Alt Name: Blok-ML No. 166
Image
Additional Sources
Launch Details
Launch Date
December 14, 1984
Launch Site
PLMSC
Launch Pad
LC41/1
Launch Vehicle
Molniya 8K78M
Orbital Elements
NORAD ID
15439
International Designator
1984-124H
Epoch
Fri, 29 May 2026 20:33:34 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
62.86°
Right Ascension
357.65°
Eccentricity
Calculating...
Argument of Perigee
257.68°
Period
733.24 min
Mean Motion
1.96 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Polar Plot
3D Visualization
Basic Satellite Info
Name
SL-6 R/B(2)
Alternative Name
Blok-ML No. 166
Type
Rocket Body
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 15439U 84124H 26149.85664946 -.00001131 00000-0 27689-3 0 9993
2 15439 62.8624 357.6493 7472055 257.6794 17.4207 1.96387307254364
Source: Celestrak
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
3.3
Diameter
2.3
Span
3.3
Dry Mass
900
Launch Mass
4500
Shape
Cyl
Radar Cross Section
8.4737
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Blok-ML No. 166
Purpose
Unknown
Mission
Unknown
Manufacturer
NPOE
Life Expectancy
Unknown
Bus
Blok-L
Configuration
Unknown
Motor
Unknown
Equipment
Unknown
Power System
Unknown
ADCS
Unknown
Transmitter Frequency
Unknown
Map
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration
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