ATLAS CENTAUR R/B(2) (11003)

COSPAR: N/A | Alt Name: Centaur AC-51
DECAYED

Image
ATLAS CENTAUR R/B(2) Satellite Image
Additional Sources
Launch Details

Launch Date

August 8, 1978

Launch Pad

Unknown

Launch Vehicle

Unknown

Orbital Elements

NORAD ID

11003

International Designator

N/A

Decay Date

Unknown

Basic Satellite Info

Name

ATLAS CENTAUR R/B(2)

Alternative Name

Centaur AC-51

Type

Rocket Body

Status

Space Junk

Owner

LERC

Country

United States

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

10.1

Diameter

3.1

Span

10.1

Dry Mass

1840

Launch Mass

1840

Shape

Cyl

Radar Cross Section

Unknown

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

Centaur D-1AR AC-51

Purpose

Unknown

Mission

Unknown

Manufacturer

GDC

Life Expectancy

Unknown

Bus

Centaur

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.

The Space Station Space Race

The Space Station Space Race

As the International Space Station nears retirement, private companies are stepping up to fill the void with their own space stations. Discover the key players and the potential impact on space exploration.

X Report 20 Jul 2025

X Report 20 Jul 2025

SpaceX successfully launched 24 Starlink satellites, enhancing its constellation while continuing its leadership in satellite deployment for global internet coverage.

X Report 26 Aug 2025

X Report 26 Aug 2025

SpaceX's ongoing challenges with the Starship Flight 10 launch are prominent today, as weather and technical issues continue to push back the schedule. Meanwhile, successful cargo missions to the ISS highlight the company's ongoing commitment to space operations.

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.

Space Brief 6 Dec 2025

Space Brief 6 Dec 2025

Discover the latest developments in hypersonic missile production, defense innovation strategies, and satellite infrastructure resilience impacting military operations.

Firefly Alpha Returns to Flight After Anomaly | KeepTrack Space Brief

Firefly Alpha Returns to Flight After Anomaly | KeepTrack Space Brief

Firefly Aerospace launches return-to-flight Firefly Alpha on March 10 after Flight 6 anomaly. SpaceX also launches EchoStar 25 GEO satellite and multiple Starlink batches this week.

Space Brief 28 Aug 2024

Space Brief 28 Aug 2024

A Falcon 9 booster fails to land, increasing GPS and PNT significance for national security, and NASA's SLS mobile launch platform costs soar.

X Report 2 Oct 2025

X Report 2 Oct 2025

Today's briefing covers Starlink's role in disaster recovery in the Philippines, insights into the evolving direct-to-device market, and news of European plans for a reusable upper stage rocket inspired by SpaceX's Starship.