SL-12 R/B(AUX MOTOR) (21793)

COSPAR: 1991-079E | Alt Name: DM2-51L SOZ-1
DECAYED

Image
SL-12 R/B(AUX MOTOR) Satellite Image
Additional Sources
Launch Details

Launch Date

November 22, 1991

Launch Pad

LC81/23

Launch Vehicle

Proton-K/DM-2

Orbital Elements

NORAD ID

21793

International Designator

1991-079E

Decay Date

6/23/1992

Basic Satellite Info

Name

SL-12 R/B(AUX MOTOR)

Alternative Name

DM2-51L SOZ-1

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

1.1

Diameter

0.5

Span

1.1

Dry Mass

60

Launch Mass

120

Shape

Cyl

Radar Cross Section

0.06

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

SOZ

Purpose

Unknown

Mission

Unknown

Manufacturer

NPOE

Life Expectancy

Unknown

Bus

SOZ

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.

Space Brief 15 Sep 2025

Space Brief 15 Sep 2025

Discover the latest in satellite tracking with key topics covering the launch of Tranche 1 satellites for the Space Development Agency, a record-setting Transporter-15 mission by Exolaunch, and new defense-focused satellite connectivity solutions by Satlink and Rivada.

X Report 11 Jun 2025

X Report 11 Jun 2025

SpaceX successfully launched 23 Starlink satellites while facing delays in launching the Axiom Space mission due to a propellant leak. Additionally, new US broadband rules favor Starlink's expansion into rural markets.

Blue Origin Announces 5,400-Satellite Constellation to Rival Starlink | KeepTrack X Report

Blue Origin Announces 5,400-Satellite Constellation to Rival Starlink | KeepTrack X Report

Blue Origin reveals plans for 5,400+ satellite constellation targeting enterprise and government with 6 Tbps capacity. SpaceX launches first West Coast Starlink mission of 2026 from Vandenberg.

Space Brief 30 May 2025

Space Brief 30 May 2025

Today's brief highlights significant advancements in satellite launches, new defense contracts, and technological integrations between major firms in the space sector.

Space Brief 23 Jun 2025

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.

X Report 22 Mar 2025

X Report 22 Mar 2025

SpaceX achieves its 450th Falcon 9 launch, setting a new turnaround record, while its competitor ULA remains grounded, awaiting clearance from the Space Force.

Space Brief 3 Mar 2025

Space Brief 3 Mar 2025

Historic moon landing by Firefly Aerospace, Spanish Air and Space Force advances with new simulator, and spotlight on OneWeb's communication satellite.

X Report 9 May 2025

X Report 9 May 2025

SpaceX makes strides in various sectors, from Starlink expanding services on United Airlines to new hardware aimed at enhancing home connectivity.