GPS III SV10 Launches on Falcon 9, X Report 20 Apr 2026
GPS III SV10 launched April 21 on a SpaceX Falcon 9 with 3x better accuracy and 8x anti-jamming. Starlink stands at 10,263 working satellites.
SL-12 R/B(2) (17875)
COSPAR: 1984-090F | Alt Name: Blok DM No. 51L
Image
Additional Sources
Launch Details
Launch Date
August 24, 1984
Launch Site
Launch Pad
LC200/39
Launch Vehicle
Proton-K/DM
Orbital Elements
NORAD ID
17875
International Designator
1984-090F
Epoch
Sat, 04 Jul 2026 05:07:34 GMT
Apogee
Calculating...
Perigee
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Inclination
7.72°
Right Ascension
306.37°
Eccentricity
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Argument of Perigee
168.66°
Period
1422.06 min
Mean Motion
1.01 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-12 R/B(2)
Alternative Name
Blok DM No. 51L
Type
Rocket Body
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 17875U 84090F 26185.21359064 -.00000140 00000-0 00000-0 0 9997
2 17875 7.7175 306.3686 0015845 168.6617 200.5463 1.01261373157048
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
6.3
Diameter
3.7
Span
6.3
Dry Mass
2440
Launch Mass
17200
Shape
Cyl
Radar Cross Section
2.018
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
11S86 No. 51L
Purpose
Unknown
Mission
Unknown
Manufacturer
NPOE
Life Expectancy
Unknown
Bus
Blok DM
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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