SL-4 R/B (19132)

COSPAR: 1988-042B | Alt Name: Soyuz-U 35-378 Blok-I

DECAYED

Image

Additional Sources

Launch Details

Launch Date

May 19, 1988

Launch Site

Tyuratam Missile and Space Complex

Launch Pad

LC31

Launch Vehicle

Soyuz-U

Orbital Elements

NORAD ID

19132

International Designator

1988-042B

Decay Date

6/1/1988

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U 35-378 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

44.15

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.

SpaceX Preps Seventh Starlink Launch of 2026 With 25 Satellites | KeepTrack X Report

SpaceX readies Starlink 17-20 launch of 25 satellites to polar orbit from Vandenberg pad 4E — seventh Starlink mission of the year. 11,009 total Starlink satellites launched to date.

X Report 28 Oct 2025

SpaceX successfully launched 28 Starlink satellites and settled a lawsuit, while Starlink's performance faces scrutiny in Ukraine. Additionally, MTN is enhancing Starlink's business services.

Starship V3 Static Fire Ignites 33 Engines, X Report 15 Apr 2026

SpaceX fired all 33 Raptor 3 engines in the Starship V3 static fire at Starbase, clearing Flight 12. Plus 1,000 Starlink satellites launched in 2026.

Space Brief 22 Oct 2025

Today's briefing covers space-based missile defense, AI maritime surveillance, and new governmental shifts impacting the defense sector.

Space Brief 20 Feb 2025

Expansion of national security capabilities with new services, shifts in Pentagon priorities, challenges in zero trust compliance, and more.

Blue Origin Announces 5,400-Satellite Constellation to Rival Starlink | KeepTrack X Report

Blue Origin reveals plans for 5,400+ satellite constellation targeting enterprise and government with 6 Tbps capacity. SpaceX launches first West Coast Starlink mission of 2026 from Vandenberg.

X Report 16 Dec 2024

SpaceX announces SPHEREx launch date for February 2025, and Airbus completes delivery of Thuraya 4 satellite for upcoming launch.

Starlink Airs First Super Bowl Ad, Artemis II Nears Launch | KeepTrack Space Brief

SpaceX debuts Starlink's first-ever Super Bowl ad to millions of viewers. Artemis II reaches Kennedy launch pad for first crewed lunar flyby since Apollo era.