X Report 12 Mar 2025
SpaceX successfully launches NASA missions, prepares for Crew-10 flight, and overcomes Falcon 9 launch anomalies.
SL-4 R/B (18367)
COSPAR: 1987-081B | Alt Name: Soyuz-U 28-853 Blok-I
DECAYED
Image
Additional Sources
Launch Details
Launch Date
September 17, 1987
Launch Site
PLMSC
Launch Pad
LC41/1
Launch Vehicle
Soyuz-U
Orbital Elements
NORAD ID
18367
International Designator
1987-081B
Decay Date
9/22/1987
Basic Satellite Info
Name
SL-4 R/B
Alternative Name
Soyuz-U 28-853 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
44.99
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 12 Jun 2025
Today, SpaceX faced delays in launching the Ax-4 mission due to a booster leak, while Starlink made strides towards launching in India with new telecom license approval.
SpaceX Lofts 45 Payloads Including Korean CAS500-2 | KeepTrack X Report
SpaceX's Falcon 9 rideshare lifted 45 satellites including South Korea's CAS500-2 Earth observer from Vandenberg at 0700 UTC May 3.
NordSpace Atlantic Spaceport Complex
Canada's sovereign space access finally has a construction site. How NordSpace is building the Atlantic Spaceport Complex in Newfoundland - and what the scrubbed Taiga launch reveals about the path to orbit.
Space Brief 22 Feb 2025
Today's brief covers a reveal from the US Space Force of the X-37B space plane in orbit, a developing defense shakeup involving key military leaders, confirmation of advanced federated ICAM connections by the DoD, and SAAB's plan for a Euro defense coalition. Plus, we spotlight the BDSAT-2 CubeSat.
X Report 12 Apr 2025
Key developments include the launch of Starshield satellites for the NRO and updates on Starlink launches and NASA access concerns involving Elon Musk's team.
Rocket Lab Neutron Books 5 Launches, Space Brief 8 May 2026
Rocket Lab Neutron launch schedule holds at Q4 2026 for the first flight as a five-launch contract lands; barge recovery starts on flight two.
Space Brief 25 Nov 2025
Today's briefing covers Chinese satellite launches, military defense strategies in space, increasing launch activity at the Space Coast, and potential rivals to SpaceX's Starlink.