COSMOS 859 DEB (09491)

COSPAR: 1976-099D | Alt Name: KDU
DECAYED

Image
COSMOS 859 DEB Satellite Image
Additional Sources
Launch Details

Launch Date

October 10, 1976

Launch Pad

LC31

Launch Vehicle

Soyuz-U

Orbital Elements

NORAD ID

09491

International Designator

1976-099D

Decay Date

10/24/1976

Basic Satellite Info

Name

COSMOS 859 DEB

Alternative Name

KDU

Type

Debris

Status

Space Junk

Owner

GUKOSR

Country

USSR

Constellation

N/A

Related Satellites

Major Events

N/A

Summary
Space debris, also known as space junk, encompasses all non-functional objects orbiting Earth such as defunct satellites, spent rocket stages, and fragments from collisions or disintegrations. Over time, this debris can accumulate and create an increasingly hazardous environment in orbit. Even tiny fragments, traveling at extremely high velocities, can inflict significant damage on operational satellites and spacecraft. If left unmanaged, the density of debris raises the risk of catastrophic collisions and further fragmentation, compounding the problem and threatening the safety and sustainability of space activities.
Physical Characteristics

Length

1

Diameter

0.4

Span

1

Dry Mass

140

Launch Mass

425

Shape

Frust

Radar Cross Section

Unknown

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

KDU

Purpose

Unknown

Mission

Unknown

Manufacturer

TSSKB

Life Expectancy

Unknown

Bus

Zenit KDU

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.

CelesTrak.org

CelesTrak.org

An in-depth look at CelesTrak, the leading non-profit provider of orbital element sets and collision assessment tools, trusted by space professionals worldwide.

Space Brief 10 Jul 2025

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.

The Day Fiery Failure Launched NASA

The Day Fiery Failure Launched NASA

Sixty-eight years ago, America's first satellite exploded on the launchpad in front of the entire world. But from the ashes of Vanguard TV-3 came the determination that would eventually win the Space Race.

Space Brief 3 Jun 2025

Space Brief 3 Jun 2025

Today's highlights include China's remote-sensing satellite launch, U.S. Space Force's investment in missile-tracking satellites, and NASA's MAVEN milestone on Mars.

GAO Warns Space Force Satellite Costs Rising, Workforce Cuts Add Risk | KeepTrack Space Brief

GAO Warns Space Force Satellite Costs Rising, Workforce Cuts Add Risk | KeepTrack Space Brief

GAO flags growing cost problems across Space Force satellite portfolio with workforce reductions compounding risks to missile-warning constellations like NGG and SWAT.

Space Brief 20 Aug 2025

Space Brief 20 Aug 2025

Today's Space Brief highlights Globalstar's new military focus, technological innovations in the Army's tactical systems, and a deeper look at key military satellite communications developments.

X Report 27 Aug 2025

X Report 27 Aug 2025

SpaceX successfully completes a critical test flight of its Starship vehicle while gearing up for another Starlink satellite launch, showcasing significant advancements in their launch capabilities.

X Report 24 May 2025

X Report 24 May 2025

SpaceX experiences a setback with Starship Flight 8 while continuing its Starlink deployment efforts with a successful launch from California.