SL-4 R/B (04846)

COSPAR: 1971-001B | Alt Name: Voskhod (N144) Blok-I
DECAYED

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

Launch Date

January 12, 1971

Launch Pad

LC31

Launch Vehicle

Voskhod 11A57

Orbital Elements

NORAD ID

04846

International Designator

1971-001B

Decay Date

1/17/1971

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Voskhod (N144) 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

11A57I

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 Day South Korea Achieved Independent Space Launch Capability

The Day South Korea Achieved Independent Space Launch Capability

Twelve years ago, South Korea successfully launched a satellite using its own launch vehicle and facilities for the first time, marking a crucial milestone in its journey to space independence

Space Brief 6 Jul 2025

Space Brief 6 Jul 2025

Today’s brief covers the delayed launch of Australia's first orbital rocket, China's reusability programs, and the snow-enforced shutdown of a Chilean radio telescope.

X Report 24 May 2025

X Report 24 May 2025

SpaceX experiences a setback with Starship Flight 8 while continuing its Starlink deployment efforts with a successful launch from California.

Space Brief 14 Jul 2025

Space Brief 14 Jul 2025

Today's briefing covers the latest developments in satellite intelligence funding, new mandates affecting space launch and missile defense, and the early conclusion of a private astronaut mission. We also discuss Firefly Aerospace's plans to go public and stunning imagery from NASA's Parker Solar Probe.

The Day America's Moon Rocket Began Its Journey

The Day America's Moon Rocket Began Its Journey

Fifty-nine years ago, a revolutionary new rocket thundered skyward from Cape Kennedy, testing the spacecraft that would eventually carry astronauts to the lunar surface

Rocket Lab to Acquire Iridium for $8B, X Report 30 Jun 2026

Rocket Lab to Acquire Iridium for $8B, X Report 30 Jun 2026

Rocket Lab will acquire Iridium for $8B to challenge SpaceX, whose Starlink constellation holds 10,706 working satellites of 12,390 launched.

AT&T, Verizon, T-Mobile Unite vs Starlink D2D, X Report 18 May 2026

AT&T, Verizon, T-Mobile Unite vs Starlink D2D, X Report 18 May 2026

Starlink direct-to-device competition unites AT&T, Verizon, and T-Mobile for the first time as SpaceX's 10,354 working satellites reshape mobile coverage.

Andøya Spaceport

Andøya Spaceport

Europe's Arctic gateway to orbit. How Norway's Andøya Spaceport is positioning itself as the continent's answer to launch congestion - and what the failed Isar Aerospace test flight means for the road ahead.