SL-4 R/B (14903)

COSPAR: 1984-036B | Alt Name: Soyuz-U 32-808 Blok-I

DECAYED

Image

Additional Sources

Launch Details

Launch Date

April 10, 1984

Launch Site

PLMSC

Launch Pad

LC41/1

Launch Vehicle

Soyuz-U

Orbital Elements

NORAD ID

14903

International Designator

1984-036B

Decay Date

4/13/1984

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U 32-808 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 29 Apr 2025

Today's space brief covers significant advancements in military counter-drone capabilities, workforce challenges in the Navy related to DOGE budget cuts, and highlights Germany's rise in defense spending. We also shine a spotlight on the communications satellite INTELSAT 901.

X Report 14 Nov 2025

SpaceX progresses on Starship testing while Rocket Lab delays its Neutron rocket debut, potentially impacting the competitive landscape in space launches.

Van Allen Probe A Reenters March 10 After 14 Years | KeepTrack Space Brief

NASA's Van Allen Probe A (1,300 lbs) reenters today after 14 years studying Earth's radiation belts. Most debris will burn up; ocean impact statistically likely.

Blue Origin Targets New Glenn Return Before Year-End After Pad Explosion | KeepTrack Space Brief

Blue Origin aiming for 2nd New Glenn launch by end of 2026 after LC-36 pad explosion at Cape Canaveral. Repair timeline still unclear; mission critical for national security payloads.

Pentagon Raises Golden Dome to $185B for Space Defense Layer | KeepTrack Space Brief

Pentagon increases Golden Dome missile defense budget by $10B to $185B, funding HBTSS hypersonic tracking constellation expansion. Three acceleration priorities announced.

China's 75 Unusual GEO Maneuvers Flagged by CSIS | KeepTrack Space Brief

CSIS analysis identifies 75 unusual orbital maneuvers by Chinese GEO satellites over 10 years, consistent with military reconnaissance. Track GEO objects via KeepTrack.

X Report 23 Jan 2025

SpaceX gears up for Starship Flight 8 amidst Starlink's growing presence in global internet markets.

SpaceX Valued at $1.25T as IPO Signals Intensify | KeepTrack X Report

SpaceX hits a $1.25 trillion valuation as IPO speculation mounts, Starlink 17-17 lifts off from Vandenberg, and a quantum sensor rides to orbit.