SL-4 R/B (11994)

COSPAR: 1980-079B | Alt Name: Soyuz-U No. 219 Blok-I
DECAYED

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

Launch Date

September 28, 1980

Launch Pad

LC1

Launch Vehicle

Soyuz-U

Orbital Elements

NORAD ID

11994

International Designator

1980-079B

Decay Date

10/26/1983

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U No. 219 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.

Falcon 9 Booster Sets 33-Flight Reuse Record, X Report 23 Feb 2026

Falcon 9 Booster Sets 33-Flight Reuse Record, X Report 23 Feb 2026

Falcon 9 booster reuse record: SpaceX's most-flown booster flew a 33rd flight Feb 21 with 28 Starlink V2 Minis. Two launches in a day; 9,779 on orbit.

X Report 29 Jan 2025

X Report 29 Jan 2025

Key developments include political attention on SpaceX's ISS crew return and competition forecasts between SpaceX and ULA for national security missions.

Space Brief 20 Jul 2025

Space Brief 20 Jul 2025

Today's highlights include a SpaceX launch of Starlink satellites, a pivotal delivery to the Space Force, and significant Senate funding for NASA missions.

Space Brief 15 Feb 2025

Space Brief 15 Feb 2025

Today's highlights include SpaceX's record-setting Starlink launch, Redwire's contract for USSF, and military satellite developments.

SpaceX IPO Raises $75B at $135/Share on Nasdaq Debut | KeepTrack X Report

SpaceX IPO Raises $75B at $135/Share on Nasdaq Debut | KeepTrack X Report

SpaceX's historic $75B IPO priced at $135/share launches SPCX on Nasdaq at a $1.77 trillion valuation — the largest IPO in history.

X Report 11 May 2025

X Report 11 May 2025

SpaceX successfully launched 28 Starlink satellites from Florida, marking a significant milestone in their deployment strategy. This follows the recent launch of 26 satellites from California, highlighting ongoing expansion efforts.

Space Brief 3 Nov 2025

Space Brief 3 Nov 2025

Highlighting India's significant military satellite launch, real-time satellite tracking developments in Europe, SpaceX's new rideshare mission, and more space industry news.

Space Brief 17 Jun 2025

Space Brief 17 Jun 2025

Today's space brief covers key developments in satellite monitoring, U.K. defense contracts, and critical licensing reforms supporting national security.