SL-6 R/B(2) (16125)

COSPAR: 1985-091D | Alt Name: Blok-ML

DECAYED

Image

Additional Sources

Launch Details

Launch Date

October 3, 1985

Launch Site

PLMSC

Launch Pad

LC43/4

Launch Vehicle

Molniya 8K78M

Orbital Elements

NORAD ID

16125

International Designator

1985-091D

Decay Date

2/19/2001

Basic Satellite Info

Name

SL-6 R/B(2)

Alternative Name

Blok-ML

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

3.3

Diameter

2.3

Span

3.3

Dry Mass

900

Launch Mass

4500

Shape

Cyl

Radar Cross Section

7.3932

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

Blok-ML

Purpose

Unknown

Mission

Unknown

Manufacturer

NPOE

Life Expectancy

Unknown

Bus

Blok-L

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.

SpaceX to Launch 11,000th Starlink Satellite, Crew-12 Moved Up to Feb 11 | KeepTrack X Report

SpaceX set to launch 11,000th Starlink satellite on Starlink 17-19 from Vandenberg. NASA moves Crew-12 launch to Feb 11 after ISS medical evacuation. Starship V3 targets mid-March first flight.

Space Brief 22 Jun 2025

Today's briefing covers a last-minute abort of a SpaceX Starlink launch, NASA's preparation for hypersonic tests, Airbus's progress in its space business, and more exciting developments in satellite tracking and reusable spaceflight.

Space Brief 8 Aug 2025

Today's brief highlights significant shifts in military space spending due to the Golden Dome program, the U.S. Space Force's advancements in tactical satellite communications, and NASA's race to nuclear power in space.

Space Brief 10 Jul 2025

Today's highlights include strategic shifts in the defense sector, innovations in solar technology for space, and developments in satellite-related military projects.

Space Brief 2 Nov 2025

Today's briefing covers India's military communications satellite launch, SpaceX's Starlink mission milestone, Latvia's agreement to the Artemis Accords, and more significant updates in space technology and satellite launches.

Space Brief 17 Apr 2025

Today's brief covers the redeployment of decommissioned missile technologies to orbital duties, Germany's plans for a sovereign communications network, and fresh developments in hypersonic testing through Rocket Lab.

SpaceX Orbital Data Center Plans Draw Astronomer Fury | KeepTrack X Report

SpaceX's orbital data center constellation and TERAFAB's $25B AI chip factory spark backlash as Starlink surpasses 10,116 working satellites.

SpaceX Hits 50 Launches, Falcon Heavy Scrub, X Report 28 Apr 2026

SpaceX hit 50 launches in 2026 on April 26. Falcon Heavy's ViaSat-3 mission, only its 12th flight, scrubbed on weather at Kennedy; new date pending.