SL-4 R/B (11359)

COSPAR: 1979-040B | Alt Name: Soyuz-U 55-736 Blok-I
DECAYED

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

Launch Date

May 15, 1979

Launch Site

PLMSC

Launch Pad

LC41/1

Launch Vehicle

Soyuz-U

Orbital Elements

NORAD ID

11359

International Designator

1979-040B

Decay Date

5/19/1979

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U 55-736 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 16 Dec 2024

X Report 16 Dec 2024

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

Space Brief 22 Nov 2024

Space Brief 22 Nov 2024

Today's key topics include delays in Vulcan's national security launches, a significant network upgrade contract for the Space Force, and military interest in SpaceX's Starship.

Space Brief 30 Apr 2025

Space Brief 30 Apr 2025

Today's briefing covers a significant hypersonic missile launch by the U.S. Army, the declassification of spy satellite photos aiding demining efforts, and the deployment of cutting-edge research payloads to the ISS.

10,168 Starlink Satellites in Orbit, X Report 6 Apr 2026

10,168 Starlink Satellites in Orbit, X Report 6 Apr 2026

Current number of Starlink satellites in orbit April 2026: 10,168 working of 10,177 tracked, 11,724 launched. Fleet health tops 99.9%.

X Report 27 Jul 2025

X Report 27 Jul 2025

SpaceX's rapid advancements continued this weekend with two consecutive Starlink missions and preparations for the upcoming Crew-11 launch, showcasing its efficiency and commitment to expanding satellite broadband coverage.

The Day That Changed How We Navigate Forever

The Day That Changed How We Navigate Forever

Forty-seven years ago, an Atlas rocket carried the first GPS satellite into orbit, launching a revolution in navigation that would transform daily life across the globe

X Report 3 Aug 2025

X Report 3 Aug 2025

SpaceX bids farewell to LZ-1 while continuing its mission towards advancements in satellite technology and the ongoing Starlink project.

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

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.