SL-12 R/B(AUX MOTOR) (16255)

COSPAR: 1985-107E | Alt Name: DM-56L SOZ-2

DECAYED

Image

Additional Sources

Launch Details

Launch Date

November 15, 1985

Launch Site

Tyuratam Missile and Space Complex

Launch Pad

LC200/39

Launch Vehicle

Proton-K/DM

Orbital Elements

NORAD ID

16255

International Designator

1985-107E

Decay Date

6/7/1986

Basic Satellite Info

Name

SL-12 R/B(AUX MOTOR)

Alternative Name

DM-56L SOZ-2

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

Launch Mass

120

Shape

Cyl

Radar Cross Section

1.05

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.

Blue Origin Targets New Glenn Return Before Year-End After Pad Explosion | KeepTrack Space Brief

Blue Origin aiming for 2nd New Glenn launch by end of 2026 after LC-36 pad explosion at Cape Canaveral. Repair timeline still unclear; mission critical for national security payloads.

Rheinmetall Weighs Bid for Mynaric Amid Rocket Lab Acquisition | KeepTrack Space Brief

German defense giant Rheinmetall may bid for laser-comm firm Mynaric, challenging Rocket Lab's plans. SpaceX sets Falcon 9 reuse record. Juno reveals Europa ice sheet data.

SpaceX Launches 500th Starlink Satellite of 2026, Microsoft Partnership Announced | KeepTrack X Report

SpaceX launches 500th Starlink satellite of 2026 on 540th reused booster flight. Microsoft partners with Starlink for rural internet expansion. NASA reveals first ISS medical evacuation details.

Space Brief 19 Nov 2024

Today's brief covers the investigation into Musk-Putin calls, SpaceX launch restrictions impacts, Pentagon's space investment strategies, ABL Space's pivot in focus, and Israel's defense export developments.

SpaceX Starfall Reentry Vehicle Plans Revealed by FAA | KeepTrack X Report

FAA documents expose SpaceX's Starfall reentry vehicle program, targeting in-space manufacturing support as the Starlink constellation holds 10,397 working satellites.

Space Brief 25 Aug 2024

Today's Space Brief covers NASA's decision on Starliner, SpaceX's preparations for the Polaris Dawn mission, and updates on various space activities. Also featured is an in-depth look at the Hubble Space Telescope.

Space Brief 4 Sep 2024

Today's brief highlights SpaceX's Starlink launch, the sale of Telesat's remote communications services, advancements in hypersonic missile tracking, and more on satellite imagery from the NGA.

X Report 4 Jul 2025

SpaceX continues to make strides in satellite deployment with a successful launch. The European Space Agency's new satellite enhances global atmospheric forecasting, showcasing the expanding role of launches in improving environmental monitoring.