SL-4 R/B (13123)

COSPAR: 1982-028B | Alt Name: Soyuz-U No. 310 Blok-I

DECAYED

Image

Additional Sources

Launch Details

Launch Date

April 2, 1982

Launch Site

Tyuratam Missile and Space Complex

Launch Pad

LC31

Launch Vehicle

Soyuz-U

Orbital Elements

NORAD ID

13123

International Designator

1982-028B

Decay Date

4/5/1982

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U No. 310 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.

DROID.002 - Turion Space's Eyes on the Orbital Junkyard

A 90-kilogram spacecraft with iodine thrusters and two Australian-built cameras is quietly building the case that tracking space debris is a business worth billions - and that a four-year-old startup from Irvine can own it.

China's Rocket Factory Finds a Second Gear

In 2024, China launched 68 orbital missions. In 2025, the number jumped to 97. In 2026, state media and Western analysts agree the target is 140 or more. Most of that growth is being driven by two state-backed mega-constellations, a half-dozen private launch companies hitting stride, and a deliberate national pivot toward commercial space. Beijing is no longer trying to catch SpaceX. It is trying to build an industrial base that outlasts one.

Space Brief 28 Jun 2025

Today's brief covers a Pentagon review of satellite launch options, Kongsberg's completed maritime satellite network, York's new satellite launch, DARPA's project cancellation, and more.

Space Brief 11 Sep 2025

Key updates today focus on SpaceX's latest satellite launch for the U.S. military, critical space resource assessments by the U.S. Space Force, and new developments in space infrastructure and equipment for defense operations.

Space Brief 1 Oct 2025

Today's brief covers an increase in Chinese satellite launches, the operational status of the Space Force's ATLAS software, and a significant fundraising event in the defense sector.

Space Brief 9 Nov 2025

Today's top stories include SpaceX's latest Starlink launch, Blue Origin's FAA exemption request, and major acquisitions by Intuitive Machines and Firefly Aerospace shaping the defense and space landscape.

Artemis 2 Delayed by Upper Stage Issue, Falcon 9 Hits 33rd Flight | KeepTrack Space Brief

NASA delays Artemis 2 for SLS upper stage fix and pad rollback. SpaceX Falcon 9 booster shatters reuse record with 33rd flight. Tory Bruno joins Blue Origin for defense work.

X Report 19 Dec 2025

A partial breakup incident involving a Starlink satellite raised concerns, while SpaceX continued its ambitious projects and launches.