SL-4 R/B (11357)

COSPAR: 1979-039B | Alt Name: Soyuz-U No. 175 Blok-I
DECAYED

Image
SL-4 R/B Satellite Image
Additional Sources
Launch Details

Launch Date

May 13, 1979

Launch Pad

LC31

Launch Vehicle

Soyuz-U

Orbital Elements

NORAD ID

11357

International Designator

1979-039B

Decay Date

5/15/1979

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U No. 175 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.

Vulcan Grounded as GEM 63XL Booster Passes Test | KeepTrack Space Brief

Vulcan Grounded as GEM 63XL Booster Passes Test | KeepTrack Space Brief

ULA's Vulcan remains grounded after February in-flight GEM 63XL booster anomaly. Northrop Grumman completed successful static fire test, but investigation ongoing with no return-to-flight date.

Dragon Delivers 6,500 lbs to ISS; Zenk Space Eyes June Orbital Debut | KeepTrack Space Brief

Dragon Delivers 6,500 lbs to ISS; Zenk Space Eyes June Orbital Debut | KeepTrack Space Brief

SpaceX Dragon berthed ISS with 6,500 pounds of cargo May 17. China's Zenk Space raised $26M, targeting June for Zhihang-1 rocket's orbital debut.

Space Brief 13 Nov 2024

Space Brief 13 Nov 2024

Today's focus spans critical developments in military space initiatives, strategic policy shifts, and modest steps in semiconductor advancements. Key developments include Rocket Lab's new U.S. Air Force contract, Sierra Space's progress in satellite programs, and potential policy changes under Trump's leadership.

X Report 11 Nov 2024

X Report 11 Nov 2024

SpaceX to launch Koreasat-6A on a record-tying Falcon 9 flight, and 24 Starlink satellites later today.

The Rocket That Refused to Sink

The Rocket That Refused to Sink

On April 18, 2014, a Falcon 9 first stage did something no orbital rocket had ever done before. It fired its engines on the way down, steered itself through the atmosphere using grid fins that did not yet exist, and touched the Atlantic Ocean softly enough to survive the impact. Nobody recovered it. The data was the whole point.

X Report 17 Apr 2025

X Report 17 Apr 2025

Starbase expansion progresses and Germany eyes its own satellite constellation.

Space Brief 30 Jan 2025

Space Brief 30 Jan 2025

Today's Space Brief covers key developments including U.S. Space Force tech accelerator, SpaceX veterans' startup funding, ULA's expected dominance in national security missions, and new satellite activity.

X Report 27 Feb 2025

X Report 27 Feb 2025

SpaceX's Falcon 9 rockets propel space exploration and connectivity forward with a moon landing mission, Starlink deployment, and readiness for another Starship launch trial.