SL-4 R/B (14170)

COSPAR: 1983-068B | Alt Name: Soyuz-U 12-123 Blok-I

DECAYED

Image

Additional Sources

Launch Details

Launch Date

July 5, 1983

Launch Site

PLMSC

Launch Pad

LC41/1

Launch Vehicle

Soyuz-U

Orbital Elements

NORAD ID

14170

International Designator

1983-068B

Decay Date

7/7/1983

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U 12-123 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.

The 300,000 Swerves Keeping Low Earth Orbit From Crashing

Starlink satellites fired their thrusters to dodge a collision roughly 300,000 times in 2025, about 822 times a day. Behind that number is a fragile, half-automated system of warnings, probabilities, and judgment calls that decides which close approaches are worth a maneuver and which are just noise.

X Report 5 Apr 2025

SpaceX secures major U.S. military contracts, Fram2 concludes historic mission, and preparations for another Starlink launch.

X Report 10 Apr 2025

SpaceX gears up for multiple Falcon 9 launches, amidst challenges from Project Kuiper and environmental concerns.

X Report 28 Jun 2025

SpaceX continues to dominate with two Starlink launches in one day, the unveiling of its final Crew Dragon, and facing legal challenges from Mexico regarding a recent Starship incident.

FCC Approves Reflect Orbital Sunlight Satellite | KeepTrack Space Brief

FCC clears Reflect Orbital's first satellite to bounce sunlight into nighttime zones, despite pushback from astronomers concerned about orbital streaking and wildlife impacts.

Space Brief 17 Dec 2023

Rocket Lab's successful Electron return to flight, China's third Shenlong mission, lessons from Virgin Orbit's failure in the UK, Hubble's 30-year post-repair anniversary, and a summary of recent global launches.

X Report 15 Sep 2025

SpaceX successfully launched Northrop Grumman's new Cygnus XL cargo spacecraft to the ISS, marking a significant advancement in cargo delivery capabilities.

Army Recruiting 1,000 Space Specialists Alongside Space Force | KeepTrack Space Brief

Army launches space career field seeking 1,000 new specialists. HASC chair Rogers eyes $1.5T defense budget. Army and Marines share fire mission data via JADC2.