SL-4 R/B (06983)

COSPAR: 1973-103B | Alt Name: Soyuz No. 28 Blok-I

DECAYED

Image

Additional Sources

Launch Details

Launch Date

December 18, 1973

Launch Site

Tyuratam Missile and Space Complex

Launch Pad

LC1

Launch Vehicle

Soyuz 11A511

Orbital Elements

NORAD ID

06983

International Designator

1973-103B

Decay Date

12/22/1973

Explore in the Catalog

Blok-I bus USSR satellites Rocket Bodies

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz No. 28 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.

South Korea Plans Defense Satellite Constellation With Hanwha Systems | KeepTrack Space Brief

Hanwha Systems in talks with MDA Space and Telesat for South Korean defense satellite constellation. SpaceX preps GPS satellite launch for Space Force. Seismic networks now track space junk reentry.

X Report 26 Apr 2025

SpaceX launches 28 Starlink satellites and discusses upcoming business strategies, while T-Mobile slashes Starlink cellular prices.

X Report 30 Nov 2025

SpaceX successfully launched the Transporter-15 mission, deploying 140 payloads, while Elon Musk addressed media narratives related to Starlink's humanitarian efforts following recent disasters.

The Evolution of Space Stations

A brief journey through the evolution of space stations, delving into Russia's Mir, the International Space Station, China's Tiangong, and envisioning the future of orbital habitats.

Musk Denies Starlink Price Cuts Are Response to Amazon Kuiper | KeepTrack X Report

Elon Musk denies Starlink price reductions are driven by Amazon Kuiper competition. SpaceX launches 29 Starlink satellites in 18th constellation mission of 2026. Five more coming this week.

SpaceX Plans Three Launches This Week Including ISRO Rideshare | KeepTrack X Report

SpaceX targets three launches this week including a rideshare mission with India's ISRO into Sun-Synchronous Orbit. Starlink network continues expanding with ongoing satellite deployments.

Space Brief 24 Mar 2025

Historic launches mark a transformative week in aerospace, with major milestones achieved by Isar Aerospace, SpaceX, and Botswana's entry into space. Significant advancements in reusability and European capabilities highlight key developments.

25 Starlinks Lift Off from Vandenberg in Latest Batch | KeepTrack X Report

SpaceX launched 25 more Starlink satellites from Vandenberg SFB on March 8, 2026, pushing the active constellation toward 9,914 working spacecraft.