Artemis 2 Crew Returns After 50-Year Lunar Flyby | KeepTrack Space Brief
Artemis 2 astronauts completed first crewed lunar flyby since Apollo 17, traveling 690,000 miles aboard Orion. Four crew validated deep-space systems.
SL-8 DEB (21186)
COSPAR: 1991-009AZ | Alt Name: deb S3M
Image
Additional Sources
Launch Details
Launch Date
February 12, 1991
Launch Site
PLMSC
Launch Pad
LC133/3
Launch Vehicle
Kosmos 11K65M
Orbital Elements
NORAD ID
21186
International Designator
1991-009AZ
Epoch
Sat, 04 Jul 2026 03:24:16 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
74.10°
Right Ascension
88.47°
Eccentricity
Calculating...
Argument of Perigee
81.57°
Period
118.70 min
Mean Motion
12.13 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Polar Plot
3D Visualization
Basic Satellite Info
Name
SL-8 DEB
Alternative Name
deb S3M
Type
Debris
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 21186U 91009AZ 26185.14185486 .00000300 00000-0 31921-2 0 9997
2 21186 74.1032 88.4664 0148569 81.5705 69.0538 12.13111577564063
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
0.0737
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
Satellite Articles
View All Posts »Learn more about satellites and other related topics.
Starship V3 Static Fire Sets Up Flight 12, X Report 16 Apr 2026
Starship V3 completes its first full-duration static fire in April 2026, with Flight 12 targeting May. Dual Falcon 9s push Starlink to 10,242 working.
FAA Grounds Starship V3 for Mishap Probe, X Report 29 May 2026
FAA grounds Starship pending a mishap investigation into the V3 debut flight; return to flight hinges on FAA sign-off. Starlink 10-53 added 29 sats.
Musk Denies Starlink Price Cuts Are Response to Amazon Kuiper | KeepTrack X Report
Elon Musk denies Starlink price reductions are driven by Amazon Kuiper competition. SpaceX launches 29 Starlink satellites in 18th constellation mission of 2026. Five more coming this week.
X Report 9 Feb 2025
SpaceX prepares for another Starlink launch while facing potential C-band spectrum challenges.
Space Brief 10 Dec 2025
Today's brief covers China's intense launch schedule, a new Arctic military constellation, Muon Space's defense innovations, and SpaceX's classified NROL-77 mission.
The Day Electric Propulsion Changed Spaceflight Forever
Fifty-five years ago, a revolutionary spacecraft launched from California carrying technology that would transform how we explore the solar system
X Report 2 Mar 2025
Starship receives FAA approval for its next test flight, while SpaceX prepares to launch more Starlink satellites amidst reaching 5 million subscribers.