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M-4S R/B (05126)
COSPAR: 1971-011B | Alt Name: M-4S-2 Stage 4
Image
Additional Sources
Launch Details
Launch Date
February 16, 1971
Launch Site
KSCUT
Launch Pad
M
Launch Vehicle
Mu-4S
Orbital Elements
NORAD ID
05126
International Designator
1971-011B
Epoch
Sat, 04 Jul 2026 02:29:26 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
29.68°
Right Ascension
78.74°
Eccentricity
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Argument of Perigee
196.38°
Period
104.63 min
Mean Motion
13.76 rev/day
Latitude
Calculating...
Longitude
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Altitude
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Velocity
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Polar Plot
3D Visualization
Basic Satellite Info
Name
M-4S R/B
Alternative Name
M-4S-2 Stage 4
Type
Rocket Body
Status
Space Junk
Owner
ISAS
Country
Japan
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 05126U 71011B 26185.10377838 .00000123 00000-0 54877-4 0 9994
2 05126 29.6822 78.7357 0012418 196.3774 163.6402 13.76307840786052
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
2.7
Diameter
1.5
Span
2.7
Dry Mass
310
Launch Mass
310
Shape
Sphere + Cone
Radar Cross Section
0.872
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
M-40
Purpose
Unknown
Mission
Unknown
Manufacturer
NISS
Life Expectancy
Unknown
Bus
M-40
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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