X Report 2 Jan 2025
SpaceX's 2024 launch surge sets global records, with Florida making history in the U.S. Find out how these achievements are shaping the commercial space race.
SL-4 R/B (20514)
COSPAR: 1990-020B | Alt Name: Soyuz-U2 No. 040 Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
February 28, 1990
Launch Site
Launch Pad
LC1
Launch Vehicle
Soyuz-U2
Orbital Elements
NORAD ID
20514
International Designator
1990-020B
Decay Date
3/2/1990
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Soyuz-U2 No. 040 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
11S510
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.
X Report 19 Aug 2025
SpaceX receives FAA clearance for Starship Flight 10 and celebrates its 100th Falcon 9 launch of the year, successfully deploying 24 Starlink satellites.
Astroscale Taps Isar for ELSA-M Debris Mission | KeepTrack Space Brief
Astroscale selects Isar Aerospace to launch ELSA-M, a commercial deorbit mission targeting defunct satellites in LEO. Over 20,000 trackable debris objects now in orbit.
X Report 10 Jul 2025
SpaceX continues to make strides with record-breaking Falcon launches while overcoming regulatory challenges for Starlink in India.
Space Brief 10 Jun 2025
Today's brief covers increased Space Force funding, a renewed focus on nuclear power in space, a proposed US missile defense system, new defense budget revelations, and NATO's call for increased air defenses.
Kratos Wins $447M Space Force MEO Missile Tracking Deal | KeepTrack Space Brief
Kratos awarded $447 million Space Force contract for Resilient Missile Warning Tracking ground ops center in Medium Earth Orbit, shifting missile detection away from vulnerable GEO satellites.
X Report 21 Dec 2024
SpaceX prepares for Bandwagon-2 rideshare mission launch, while FAA updates license for Starship's next flight; Crew Dragon mission faces delays.
Space Brief 19 Dec 2025
Today's brief highlights significant developments in space defense, innovation fund challenges, and international defense agreements impacting satellite utilities.