SL-4 R/B (09500)

COSPAR: 1976-106B | Alt Name: Soyuz-U 26-686 Blok-I
DECAYED

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

Launch Date

October 25, 1976

Launch Site

PLMSC

Launch Pad

LC43/4

Launch Vehicle

Soyuz-U

Orbital Elements

NORAD ID

09500

International Designator

1976-106B

Decay Date

11/1/1976

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U 26-686 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.

X Report 27 Feb 2025

X Report 27 Feb 2025

SpaceX's Falcon 9 rockets propel space exploration and connectivity forward with a moon landing mission, Starlink deployment, and readiness for another Starship launch trial.

Space Brief 2 Sep 2024

Space Brief 2 Sep 2024

Key topics: SpaceX resumes Falcon 9 launches, mysterious Starliner sounds, and upcoming space policy events. Detailed tracking info for EGYPTSAT A.

Space Brief 13 Feb 2025

Space Brief 13 Feb 2025

Today's brief covers significant advancements in space satellite launches, military spending impacts on space, and notable developments from the Space Force and SpaceX.

Space Brief 6 Dec 2025

Space Brief 6 Dec 2025

Discover the latest developments in hypersonic missile production, defense innovation strategies, and satellite infrastructure resilience impacting military operations.

X Report 7 Feb 2025

X Report 7 Feb 2025

DIU explores SpaceX Starship's in-space refueling; Investors advise startups against competing or emulating SpaceX.

Pentagon Cancels OPIR Polar After Northrop Sensor Delivery | KeepTrack Space Brief

Pentagon Cancels OPIR Polar After Northrop Sensor Delivery | KeepTrack Space Brief

Pentagon cancels Next-Generation OPIR Polar program after Northrop Grumman delivered sensor payload. LEO and MEO alternatives deemed sufficient for missile-warning coverage.

Space Brief 9 Jun 2025

Space Brief 9 Jun 2025

Key space events for today include potential changes in US space policy involving SpaceX, uncertainties regarding NASA's Starliner, and China's new steps in asteroid exploration.

SpaceX Starfall Reentry Capsule Debuts, X Report 23 Jun 2026

SpaceX Starfall Reentry Capsule Debuts, X Report 23 Jun 2026

SpaceX Starfall reentry capsule debuted June 23: the 2,100 kg disk launched on a Falcon 9 from Cape Canaveral to demo cargo return from orbit.