SL-4 R/B (10169)

COSPAR: 1977-073B | Alt Name: Soyuz-U 52-244 Blok-I
DECAYED

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

Launch Date

July 29, 1977

Launch Site

PLMSC

Launch Pad

LC43/4

Launch Vehicle

Soyuz-U

Orbital Elements

NORAD ID

10169

International Designator

1977-073B

Decay Date

8/3/1977

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U 52-244 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.

FCC Approves 7,500 More Starlink Satellites, SpaceX Wins $739M Launch Contract | KeepTrack X Report

FCC Approves 7,500 More Starlink Satellites, SpaceX Wins $739M Launch Contract | KeepTrack X Report

FCC approves 7,500 additional Starlink Gen2 satellites. Space Force awards SpaceX $739M for nine national security launches. NASA plans Crew-11 medical evacuation from ISS on January 14.

X Report 12 Jun 2025

X Report 12 Jun 2025

Today, SpaceX faced delays in launching the Ax-4 mission due to a booster leak, while Starlink made strides towards launching in India with new telecom license approval.

Apogee and Perigee

Apogee and Perigee

Understanding the high and low points of every orbit - from the International Space Station's careful dance with Earth's atmosphere to the extreme ellipses that take satellites to the edge of space and back.

Apophis 2029 Flyby: ESA-JAXA Joint Mission Locked In | KeepTrack Space Brief

Apophis 2029 Flyby: ESA-JAXA Joint Mission Locked In | KeepTrack Space Brief

ESA and JAXA finalize collaboration for asteroid Apophis 2029 flyby at 32,000 km—closer than geostationary orbit. Historic near-Earth encounter being heavily observed.

JSC Vimpel

JSC Vimpel

An analysis of Russia's independent space tracking system and how it compares to the established U.S. Space Surveillance Network

Starship V3 Debuts Flight 12 With First-Ever Self-Imaging Maneuver | KeepTrack X Report

Starship V3 Debuts Flight 12 With First-Ever Self-Imaging Maneuver | KeepTrack X Report

SpaceX's Starship V3 targets Flight 12 with an unprecedented self-inspection maneuver, while Delta Air Lines walks away from Starlink inflight Wi-Fi.

The Details of Apollo 1

The Details of Apollo 1

How a catastrophic fire in 1967 fundamentally altered NASA's approach to human spaceflight and continues to influence modern spacecraft design

X Report 2 May 2025

X Report 2 May 2025

SpaceX successfully launched 28 more Starlink satellites from Cape Canaveral, marking another milestone in its satellite constellation expansion.