SL-4 R/B (19942)

COSPAR: 1989-032B | Alt Name: Soyuz-U No. 593 Blok-I
DECAYED

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

Launch Date

April 26, 1989

Launch Site

PLMSC

Launch Pad

LC41/1

Launch Vehicle

Soyuz-U

Orbital Elements

NORAD ID

19942

International Designator

1989-032B

Decay Date

5/8/1989

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U No. 593 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.

Space Brief 8 Apr 2025

Space Brief 8 Apr 2025

Key highlights include the launch of a Navy SEAL astronaut to the ISS, multi-billion dollar contracts awarded by the US Space Force, advancements in secure GPS technology, and a strategic ISR arrangement.

Starlink Satellites Dominate Earth's Orbit

Starlink Satellites Dominate Earth's Orbit

SpaceX's Starlink constellation has grown at an astonishing rate, now accounting for over 20% of all trackable objects in orbit. With plans for tens of thousands more, Starlink is on the cusp of forever changing the landscape of Earth's near-space environment.

Space Brief 5 Mar 2025

Space Brief 5 Mar 2025

Today's brief covers developments in US military space initiatives, advancements in missile technology, and notable military contractor activities.

Space Brief 10 Dec 2025

Space Brief 10 Dec 2025

Today's brief covers China's intense launch schedule, a new Arctic military constellation, Muon Space's defense innovations, and SpaceX's classified NROL-77 mission.

X Report 13 Mar 2025

X Report 13 Mar 2025

SpaceX scrubs Crew-10 launch due to hydraulics issue; successful Falcon 9 launch for NASA missions, and Texas supports SpaceX expansion.

X Report 30 Aug 2025

X Report 30 Aug 2025

SpaceX impresses with the successful launch of 24 Starlink satellites and shares stunning visuals from the recent Starship Flight 10, which demonstrated remarkable landing precision.

Rheinmetall Weighs Bid for Mynaric Amid Rocket Lab Acquisition | KeepTrack Space Brief

Rheinmetall Weighs Bid for Mynaric Amid Rocket Lab Acquisition | KeepTrack Space Brief

German defense giant Rheinmetall may bid for laser-comm firm Mynaric, challenging Rocket Lab's plans. SpaceX sets Falcon 9 reuse record. Juno reveals Europa ice sheet data.

Space Brief 18 Nov 2024

Space Brief 18 Nov 2024

Today’s Space Brief covers the deployment of a new optical sensor for the Space Force, SpaceX's recent Starlink satellite launch, and significant investment in space cargo vehicles.