Space Brief 5 Dec 2025
Focusing on military satellite initiatives, defense strategies, and advancements in air and cyber capabilities
SL-12 R/B(2) (19400)
COSPAR: 1988-071D | Alt Name: Blok DM-2 No. 15L
Image
Additional Sources
Launch Details
Launch Date
August 18, 1988
Launch Site
Launch Pad
LC200/40
Launch Vehicle
Proton-K/DM-2
Orbital Elements
NORAD ID
19400
International Designator
1988-071D
Epoch
Sat, 04 Jul 2026 04:19:37 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
11.23°
Right Ascension
328.95°
Eccentricity
Calculating...
Argument of Perigee
241.13°
Period
1432.36 min
Mean Motion
1.01 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Polar Plot
3D Visualization
Basic Satellite Info
Name
SL-12 R/B(2)
Alternative Name
Blok DM-2 No. 15L
Type
Rocket Body
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 19400U 88071D 26185.18029006 -.00000166 00000-0 00000-0 0 9990
2 19400 11.2336 328.9530 0019222 241.1320 285.2481 1.00533263132875
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
17490
Shape
Cyl
Radar Cross Section
2.3906
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
11S861 No. 15L
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
Satellite Articles
View All Posts »Learn more about satellites and other related topics.
SpaceX and xAI Tapped for Pentagon's $100M Drone Contest | KeepTrack X Report
Pentagon selects SpaceX and xAI for $100M autonomous drone competition. Two Falcon 9 rockets launch Starlink sats from California and Florida. 11,215 total Starlink satellites launched.
Musk Confirms Starmind AI Constellation, X Report 24 Jun 2026
Musk confirms Starmind, an AI satellite constellation targeting 1 million orbital compute nodes. Starfall's debut and Dragon's ISS departure follow.
Space Brief 13 Aug 2025
Today's Space Brief covers the inaugural national security mission of ULA's Vulcan Centaur, the Space Force's 2026 budget insights, and shifts in military drone technology.
X Report 5 Feb 2025
SpaceX launches Maxar's high-resolution imaging satellites, Ontario reconsiders its Starlink contract, and the countdown to NASA's Lunar Trailblazer mission begins.
Rocket Lab Wins $190M Pentagon Hypersonic Contract | KeepTrack Space Brief
Rocket Lab secures $190M Pentagon deal for 20 hypersonic test flights over 4 years using Electron. Five missions annually trackable via Space-Track.
Space Brief 27 Mar 2025
Today's highlights include the certification of ULA's Vulcan rocket for national security missions, developments in nuclear timekeeping for GPS systems, and updates on the Space Force's new warfighting framework.
Space Brief 30 Jun 2025
Today's highlights include SpaceX's record-breaking launches, Japan's final H-2A launch, and significant developments in satellite data policies impacting weather forecasting.