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Today's briefing covers the U.S. Space Force's substantial investments in commercial satellite services, a strategic military shift, Chinese space station upgrades, and NASA's policy changes.
SL-16 DEB (25863)
COSPAR: 1999-039D | Alt Name: Sep Motor Cover
Image
Additional Sources
Launch Details
Launch Date
July 17, 1999
Launch Site
Launch Pad
LC45/1
Launch Vehicle
Zenit-2
Orbital Elements
NORAD ID
25863
International Designator
1999-039D
Epoch
Fri, 03 Jul 2026 16:23:03 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
98.36°
Right Ascension
255.13°
Eccentricity
Calculating...
Argument of Perigee
151.72°
Period
99.53 min
Mean Motion
14.47 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Polar Plot
3D Visualization
Basic Satellite Info
Name
SL-16 DEB
Alternative Name
Sep Motor Cover
Type
Debris
Status
Space Junk
Owner
RVSNR
Country
Russia
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 25863U 99039D 26184.68267804 .00000851 00000-0 21707-3 0 9990
2 25863 98.3643 255.1294 0147873 151.7250 0.1325 14.46796273417482
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
1
Span
1
Dry Mass
1
Launch Mass
1
Shape
Cone
Radar Cross Section
0.0827
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Sep Motor Cover
Purpose
Unknown
Mission
Unknown
Manufacturer
YUZHUA
Life Expectancy
Unknown
Bus
Sep Motor Cover
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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