SL-4 R/B (26571)

COSPAR: 2000-064B | Alt Name: Soyuz-U-PVB No. 085 Blok-I

DECAYED

Image

Additional Sources

Launch Details

Launch Date

October 16, 2000

Launch Site

Tyuratam Missile and Space Complex

Launch Pad

LC1

Launch Vehicle

Soyuz-U-PVB

Orbital Elements

NORAD ID

26571

International Designator

2000-064B

Decay Date

10/18/2000

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U-PVB No. 085 Blok-I

Type

Rocket Body

Status

Space Junk

Owner

RVSNR

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

23.44

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.

Europe's First Starlink Direct-to-Smartphone Service Goes Live | KeepTrack X Report

Virgin Media O2 launches Europe's first Starlink direct-to-smartphone service in the UK. SpaceX launches 29 more Starlink satellites. Dragon cargo capsule returns after 6-month ISS mission.

Space Brief 9 Oct 2025

Today's briefing covers key developments in defense budgets reshaping the space sector, significant Space Force contracts, and the latest news from the Chinese space station.

X Report 16 Dec 2025

SpaceX successfully launched its 100th Falcon 9 flight, deploying 29 Starlink satellites, while NASA plans to test SpaceX’s Starshield. Additionally, SpaceX engages in social media commentary regarding American Airlines' interest in Amazon's Starlink rival.

SpaceX Launches 1,500th Starlink of 2026, Space Brief 15 Jun 2026

SpaceX launches its 1,500th Starlink satellite of 2026 as shares jump 19% on Nasdaq debut day. Musk targets $1 trillion in annual revenue by 2030.

ULA Launches 29 Amazon Kuiper Satellites; Falcon Heavy Returns | KeepTrack Space Brief

ULA's Atlas V deployed 29 Amazon Kuiper LEO satellites on April 27. Falcon Heavy returns this week with ViaSat-3 F3. Six orbital launches scheduled across three continents.

Space Brief 19 Dec 2025

Today's brief highlights significant developments in space defense, innovation fund challenges, and international defense agreements impacting satellite utilities.

Trump Asks Musk About Starlink for Iran Internet Blackout | KeepTrack X Report

Trump approaches Elon Musk about restoring Iran internet via Starlink during government blackout. SpaceX completes fifth launch of 2026 with 29 Starlink satellites from Cape Canaveral.

X Report 9 Oct 2025

SpaceX continues to make strides with successful satellite launches and competitive maneuvering in the direct-to-device market, as AST SpaceMobile aligns with Verizon for space-based cellular services.