X Report 1 Mar 2025
FAA greenlights Flight 8 of SpaceX's Starship while senators examine Air Force nominee's ties to the company.
SL-6 R/B(2) (09921)
COSPAR: 1977-027D | Alt Name: Blok-L
Image
Additional Sources
Launch Details
Launch Date
April 11, 1977
Launch Site
PLMSC
Launch Pad
LC43/3
Launch Vehicle
Molniya 8K78M
Orbital Elements
NORAD ID
09921
International Designator
1977-027D
Epoch
Fri, 17 Jul 2026 04:57:02 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
72.21°
Right Ascension
135.44°
Eccentricity
Calculating...
Argument of Perigee
141.09°
Period
723.98 min
Mean Motion
1.99 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Polar Plot
3D Visualization
Explore in the Catalog
Basic Satellite Info
Name
SL-6 R/B(2)
Alternative Name
Blok-L
Type
Rocket Body
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 09921U 77027D 26198.20628397 -.00000531 00000+0 00000+0 0 9995
2 09921 72.2066 135.4362 5287047 141.0851 3.9868 01.98899259357899
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
3.3
Diameter
2.4
Span
3.3
Dry Mass
1000
Launch Mass
4500
Shape
Cyl
Radar Cross Section
5.5274
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Blok-L
Purpose
Unknown
Mission
Unknown
Manufacturer
NPOE
Life Expectancy
Unknown
Bus
Blok-L
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.
X Report 17 Jun 2025
SpaceX successfully launched 26 Starlink satellites from California, preparing for upcoming crewed missions to the ISS.
SpaceX Starfall Reentry Capsule Debuts, X Report 23 Jun 2026
SpaceX Starfall reentry capsule debuted June 23: the 2,100 kg disk launched on a Falcon 9 from Cape Canaveral to demo cargo return from orbit.
Space Brief 18 Apr 2025
Today's highlights include a Minotaur IV launch of U.S. spy satellites, Rocket Lab's new defense contracts, and the unveiling of Space Force's warfighting framework. Plus, the Satellite Spotlight dives into METEOR 3-1.
Block 3 Starship Prep Accelerates at Starbase | KeepTrack X Report
SpaceX accelerates Block 3 Starship pad work at Starbase as Russia preps Soyuz-5 debut alongside Falcon 9 internet satellite launches.
X Report 13 Apr 2025
SpaceX successfully launches 21 Starlink satellites and deploys a new batch of spy satellites for the US government.
SaxaVord Spaceport
The UK's orbital ambitions rest on a remote Shetland island. How SaxaVord became Europe's first fully licensed vertical launch spaceport - and why, despite being ready for years, it's still waiting for a rocket that works.
X Report 6 Dec 2025
SpaceX secures environmental approval for Starship launches at SLC-37 while Castelion, a company founded by SpaceX veterans, raises $350 million for hypersonic missile production.