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SpaceX prepares for the launch of significant NASA and NOAA missions, while Starship's 11th test flight edges closer.
SL-6 R/B(2) (10155)
COSPAR: 1977-054D | Alt Name: Blok-L
Image
Additional Sources
Launch Details
Launch Date
June 24, 1977
Launch Site
Launch Pad
LC1
Launch Vehicle
Molniya 8K78M
Orbital Elements
NORAD ID
10155
International Designator
1977-054D
Epoch
Fri, 26 Jun 2026 05:55:36 GMT
Apogee
Calculating...
Perigee
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Inclination
64.19°
Right Ascension
204.75°
Eccentricity
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Argument of Perigee
277.31°
Period
578.41 min
Mean Motion
2.49 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
SL-6 R/B(2)
Alternative Name
Blok-L
Type
Rocket Body
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 10155U 77054D 26177.24695382 .00000176 00000-0 00000+0 0 9990
2 10155 64.1890 204.7512 6532242 277.3082 18.0190 2.48959052118986
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
2.4
Span
3.3
Dry Mass
1000
Launch Mass
4500
Shape
Cyl
Radar Cross Section
7.6456
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Blok-L
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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