X Report 30 Aug 2025
SpaceX impresses with the successful launch of 24 Starlink satellites and shares stunning visuals from the recent Starship Flight 10, which demonstrated remarkable landing precision.
SL-4 R/B (06901)
COSPAR: 1973-079B | Alt Name: Voskhod 19-287 Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
October 27, 1973
Launch Site
PLMSC
Launch Pad
LC41/1
Launch Vehicle
Voskhod 11A57
Orbital Elements
NORAD ID
06901
International Designator
1973-079B
Decay Date
11/9/1973
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Voskhod 19-287 Blok-I
Type
Rocket Body
Status
Space Junk
Owner
RVSN
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
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
6.7
Diameter
2.7
Span
6.7
Dry Mass
2350
Launch Mass
2350
Shape
Cyl
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
11A57I
Purpose
Unknown
Mission
Unknown
Manufacturer
PROG
Life Expectancy
Unknown
Bus
Blok-I
Configuration
Unknown
Motor
Unknown
Equipment
Unknown
Power System
Unknown
ADCS
Unknown
Transmitter Frequency
Unknown
Satellite Articles
View All Posts »Learn more about satellites and other related topics.
Space Brief 15 Sep 2025
Discover the latest in satellite tracking with key topics covering the launch of Tranche 1 satellites for the Space Development Agency, a record-setting Transporter-15 mission by Exolaunch, and new defense-focused satellite connectivity solutions by Satlink and Rivada.
X Report 18 Jun 2025
SpaceX successfully launched 28 Starlink satellites while preparing for the upcoming Ax-4 mission to the ISS. Significant progress continues in their ongoing space endeavors.
Space Brief 1 Nov 2025
Today's brief covers the future of military space operations, ESA's potential defense role, significant developments in satellite communications, and SpaceX's response to Artemis 3 comments.
X Report 19 Dec 2025
A partial breakup incident involving a Starlink satellite raised concerns, while SpaceX continued its ambitious projects and launches.
Falcon 9 Booster Sets 33-Flight Reuse Record, X Report 23 Feb 2026
Falcon 9 booster reuse record: SpaceX's most-flown booster flew a 33rd flight Feb 21 with 28 Starlink V2 Minis. Two launches in a day; 9,779 on orbit.
Deep Space Advanced Radar Capability (DARC)
How a groundbreaking radar network is transforming our ability to monitor threats in deep space while strengthening international security partnerships
Space Brief 8 Nov 2025
Today's Space Brief covers major developments in Pentagon procurement methods, strategic satellite intelligence advancements, and increasing interest in drone technology within the defense sector.