SL-6 R/B(1) (16923)

COSPAR: 1986-065B | Alt Name: Molniya-M 21-687 Blok-I
DECAYED

Image
SL-6 R/B(1) Satellite Image
Additional Sources
Launch Details

Launch Date

August 28, 1986

Launch Site

PLMSC

Launch Pad

LC16/2

Launch Vehicle

Molniya 8K78M

Orbital Elements

NORAD ID

16923

International Designator

1986-065B

Decay Date

10/22/1986

Basic Satellite Info

Name

SL-6 R/B(1)

Alternative Name

Molniya-M 21-687 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

7

Diameter

2.7

Span

7

Dry Mass

2700

Launch Mass

2700

Shape

Cyl

Radar Cross Section

15.19

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.

Space Brief 30 Aug 2025

Space Brief 30 Aug 2025

Today's briefing covers the latest satellite communications advancements, a secretive military launch by SpaceX, and new space defense organizational structures.

SpaceX and xAI Tapped for Pentagon's $100M Drone Contest | KeepTrack X Report

SpaceX and xAI Tapped for Pentagon's $100M Drone Contest | KeepTrack X Report

Pentagon selects SpaceX and xAI for $100M autonomous drone competition. Two Falcon 9 rockets launch Starlink sats from California and Florida. 11,215 total Starlink satellites launched.

The Evolution of Space Stations

The Evolution of Space Stations

A brief journey through the evolution of space stations, delving into Russia's Mir, the International Space Station, China's Tiangong, and envisioning the future of orbital habitats.

Space Brief 11 Sep 2025

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.

X Report 4 Aug 2025

X Report 4 Aug 2025

SpaceX achieves significant milestones with the launch of 28 Starlink satellites and the final landing of the LZ-1 pad, marking key moments in their ongoing mission to expand satellite connectivity.

Space Brief 12 Mar 2025

Space Brief 12 Mar 2025

Today's space news highlights include the proposed budget expansion for the U.S. Space Force, a new CubeSat milestone for ESA's asteroid mission, and challenges with SpaceX's Starlink launch. Also, we celebrate the one-year anniversary of the Aries SN1 satellite in orbit.

NRO Adds 3 New Partners to Commercial Imaging Program | KeepTrack Space Brief

NRO Adds 3 New Partners to Commercial Imaging Program | KeepTrack Space Brief

NRO expands commercial imaging with HEO, SatVu, and Sierra Nevada. ChatGPT rolls out to 3 million military users via GenAI.mil. C-130J deliveries paused.

Space Brief 25 Oct 2025

Space Brief 25 Oct 2025

Today's brief covers significant growth forecasts for global defense satellite communications, the integration of hypersonic missiles, cyber authority expansion in the Army, and more pivotal military developments.