SL-12 R/B (12928)

COSPAR: 1981-106B | Alt Name: D-1-5L SOZ-1
DECAYED

Image
SL-12 R/B Satellite Image
Additional Sources
Launch Details

Launch Date

October 30, 1981

Launch Pad

LC200/40

Launch Vehicle

Proton-K/D-1

Orbital Elements

NORAD ID

12928

International Designator

1981-106B

Decay Date

10/31/1981

Basic Satellite Info

Name

SL-12 R/B

Alternative Name

D-1-5L 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

Diameter

0.6

Span

1

Dry Mass

56

Launch Mass

110

Shape

Cyl

Radar Cross Section

Unknown

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.

Suborbital Tourism Scorecard 2026, the Edge of Space Goes Quiet

Suborbital Tourism Scorecard 2026, the Edge of Space Goes Quiet

Twenty-two years after SpaceShipOne, the two companies that defined suborbital tourism are both sitting on the ground. Blue Origin parked New Shepard in January, Virgin Galactic has not flown a customer since 2024, and the math behind the whole business is finally getting an honest look.

Top 10 Features You Didn't Know About Starlink

Top 10 Features You Didn't Know About Starlink

Discover the hidden gems and lesser-known aspects of SpaceX's revolutionary Starlink satellite internet service, from Easter eggs to advanced technical features.

L3Harris, Sierra Space Win $1.75B Missile-Tracking Satellite Contract | KeepTrack Space Brief

L3Harris, Sierra Space Win $1.75B Missile-Tracking Satellite Contract | KeepTrack Space Brief

L3Harris and Sierra Space awarded $1.75 billion to build 36 missile-tracking satellites for SDA's Tracking Layer constellation. Hypersonic and ballistic missile detection from low Earth orbit.

X Report 3 Apr 2025

X Report 3 Apr 2025

Exciting advancements from SpaceX's Fram2 mission and the pivotal role of biotech in space exploration.

Pentagon Pauses LEO Constellation as Acquisition Reviews Continue | KeepTrack Space Brief

Pentagon Pauses LEO Constellation as Acquisition Reviews Continue | KeepTrack Space Brief

Pentagon puts LEO constellation layers on hold during acquisition review. SpaceX and xAI join $100M autonomous drone contest. China's Zenk Space completes first stage static fire.

Space Brief 27 Aug 2024

Space Brief 27 Aug 2024

Today's highlights include the destruction of ABL Space Systems' rocket due to engine leaks, Firefly Aerospace's lunar lander pre-launch tests, and insights on U.S. military's space domain awareness enhancements.

Space Brief 6 Dec 2024

Space Brief 6 Dec 2024

Today's brief covers various military applications of climate-monitoring satellites, new defense strategies against unmanned threats, and the potential impacts of geopolitical tensions on orbit.

Starlink Adds $10/Mo Hardware Fee & Price Hike | KeepTrack X Report

Starlink Adds $10/Mo Hardware Fee & Price Hike | KeepTrack X Report

Starlink shifts to monthly hardware rental fees while SpaceX preps Booster 20 for Flight 13 — 10,558 satellites now operational worldwide.