The Day NASA Chose Its First Space Pioneers
Sixty-four years ago, NASA made a decision that would shape the future of human spaceflight by selecting three astronauts to compete for America's first journey into space
SL-3 DEB (15521)
COSPAR: 1974-083C | Alt Name: deb Blok E
Image
Additional Sources
Launch Details
Launch Date
October 28, 1974
Launch Site
PLMSC
Launch Pad
LC43/4
Launch Vehicle
Vostok 8A92M
Orbital Elements
NORAD ID
15521
International Designator
1974-083C
Epoch
Sat, 04 Jul 2026 05:24:56 GMT
Apogee
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Perigee
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Inclination
81.21°
Right Ascension
170.65°
Eccentricity
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Argument of Perigee
65.60°
Period
102.15 min
Mean Motion
14.10 rev/day
Latitude
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Longitude
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Altitude
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Velocity
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Polar Plot
3D Visualization
Basic Satellite Info
Name
SL-3 DEB
Alternative Name
deb Blok E
Type
Debris
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 15521U 74083C 26185.22565453 .00000191 00000-0 10012-3 0 9998
2 15521 81.2132 170.6470 0056109 65.6041 313.2185 14.09684595660737
Source: Celestrak
Summary
Space debris, also known as space junk, encompasses all non-functional objects orbiting Earth such as defunct satellites, spent rocket stages, and fragments from collisions or disintegrations. Over time, this debris can accumulate and create an increasingly hazardous environment in orbit. Even tiny fragments, traveling at extremely high velocities, can inflict significant damage on operational satellites and spacecraft. If left unmanaged, the density of debris raises the risk of catastrophic collisions and further fragmentation, compounding the problem and threatening the safety and sustainability of space activities.
Physical Characteristics
Length
0
Diameter
0
Span
0
Dry Mass
0
Launch Mass
0
Shape
N/A
Radar Cross Section
0.013
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Unknown
Purpose
Unknown
Mission
Unknown
Manufacturer
Unknown
Life Expectancy
Unknown
Bus
Unknown
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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