X Report 21 Sep 2025
Key updates include a potential delay for the Starship lunar lander, successful static fire tests for Ship 38, and the latest Starlink satellite launch plans.
SL-8 R/B (08421)
COSPAR: 1975-103B | Alt Name: Kosmos-3M 31-275 Stage 2
Image
Additional Sources
Launch Details
Launch Date
November 4, 1975
Launch Site
PLMSC
Launch Pad
LC132/1
Launch Vehicle
Kosmos 11K65M
Orbital Elements
NORAD ID
08421
International Designator
1975-103B
Epoch
Sat, 04 Jul 2026 02:06:58 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
82.97°
Right Ascension
233.50°
Eccentricity
Calculating...
Argument of Perigee
350.82°
Period
104.57 min
Mean Motion
13.77 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Polar Plot
3D Visualization
Basic Satellite Info
Name
SL-8 R/B
Alternative Name
Kosmos-3M 31-275 Stage 2
Type
Rocket Body
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 08421U 75103B 26185.08817883 .00000117 00000-0 10282-3 0 9991
2 08421 82.9720 233.4959 0022711 350.8247 36.8924 13.77096421543444
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
4.2
Diameter
2.4
Span
4.2
Dry Mass
1434
Launch Mass
1434
Shape
Cyl
Radar Cross Section
4.5321
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
S3M
Purpose
Unknown
Mission
Unknown
Manufacturer
OAZ
Life Expectancy
Unknown
Bus
S3
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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