SL-4 R/B (37680)

COSPAR: 2011-027B | Alt Name: Soyuz-U-PVB No. 128 Blok-I

DECAYED

Image

Additional Sources

Launch Details

Launch Date

June 21, 2011

Launch Site

Tyuratam Missile and Space Complex

Launch Pad

LC1

Launch Vehicle

Soyuz-U-PVB

Orbital Elements

NORAD ID

37680

International Designator

2011-027B

Decay Date

6/23/2011

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U-PVB No. 128 Blok-I

Type

Rocket Body

Status

Space Junk

Owner

KVR

Country

Russia

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

15.4825

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

11S510

Purpose

Unknown

Mission

Unknown

Manufacturer

PROGT

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 Soviet Women Reached for the Stars

Sixty-three years ago, the Soviet Union selected the world's first female cosmonaut training group, launching a new era in human spaceflight that would transform our understanding of gender equality in space exploration

MDA and Hanwha Partner on South Korea K-LEO Defense Network | KeepTrack Space Brief

MDA Space and Hanwha target South Korea's K-LEO defense satellite network. House passes $839B defense bill. Pentagon picks 25 vendors for $150M drone competition.

Space Brief 14 Sep 2025

Today's highlights include SpaceX's 300th Starlink launch, NASA re-establishing contact with a TRACERS satellite, and budget concerns impacting the commercial remote sensing industry.

Space Brief 23 Jun 2025

Significant advancements and launches in space: NASA's hypersonic sensor breakthrough, ChinaSat-9C's launch, and SpaceX's resilient Falcon 9 operations.

Starbase Pad 2 Preps for Booster 19, Starlink Disrupts Russian Comms | KeepTrack X Report

Starbase Pad 2 passes water-cooled deck test ahead of Booster 19. Starlink restrictions disrupt Russian battlefield communications. California city weighs banning Musk companies.

Space Object Catalog

The master ledger of everything orbiting Earth: how tens of thousands of satellites, rocket bodies, and debris fragments are tracked and numbered

X Report 23 Nov 2024

SpaceX advances with Starship tests as Starlink continues global expansion. Key infrastructure updates from Cape Canaveral involve multiple industry players.

Space Brief 4 Dec 2024

Today's brief covers significant advancements in materials technology for space applications, a U.S. Navy contract for rocket production facilities, and NATO's upcoming classified cloud system.