DELTA 2 R/B(1) (21554)

COSPAR: 1991-047C | Alt Name: Delta 206
DECAYED

Image
DELTA 2 R/B(1) Satellite Image
Additional Sources
Launch Details

Launch Date

July 4, 1991

Launch Pad

LC17A

Launch Vehicle

Delta 7925

Orbital Elements

NORAD ID

21554

International Designator

1991-047C

Decay Date

10/26/1991

Basic Satellite Info

Name

DELTA 2 R/B(1)

Alternative Name

Delta 206

Type

Rocket Body

Status

Space Junk

Owner

MDAC

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

7

Diameter

2.4

Span

7

Dry Mass

924

Launch Mass

6930

Shape

Cyl + Cone

Radar Cross Section

11.29

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

Delta SSPS AJ10-118K

Purpose

Unknown

Mission

Unknown

Manufacturer

MDAC

Life Expectancy

Unknown

Bus

Delta/0020

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.

X Report 18 Sep 2025

X Report 18 Sep 2025

SpaceX gears up for a busy week with new Starship testing and enhanced Starlink capabilities on the horizon.

Space Brief 18 Aug 2025

Space Brief 18 Aug 2025

Today's Space Brief covers significant satellite launches by SpaceX, an automated collision avoidance system development, Rocket Lab's strategic acquisition, and the rise of corporate-named satellites in orbit.

Space Brief 14 Feb 2025

Space Brief 14 Feb 2025

Key developments include Redwire's contract for a US Space Force mission, UK's steps toward its first orbital launch, and a detailed military satellite spotlight.

The $30 Million Toilet That Keeps Breaking on the Way to the Moon

The $30 Million Toilet That Keeps Breaking on the Way to the Moon

Sixty years of space toilet engineering, a decade of development, and a $30 million contract - and the Artemis II crew still had to pee in bags on Day 1.

NASA Pressures Blue Origin on HLS After New Glenn Explosion | KeepTrack Space Brief

NASA Pressures Blue Origin on HLS After New Glenn Explosion | KeepTrack Space Brief

NASA demands Blue Origin find alternate launcher for Artemis moon landers after New Glenn test explosion damaged Cape Canaveral LC-36. Schedule risk to lunar missions.

Space Brief 23 Oct 2025

Space Brief 23 Oct 2025

Today's updates cover Vantor's satellites overcoming tracking challenges, a startup's ambitious missile defense test, and more pivotal space events.

Space Brief 18 Jul 2025

Space Brief 18 Jul 2025

Today's highlights include Space Force prioritizing military missions, testing new GPS satellite software, and international defense collaborations impacting space assets.

White House Orders Space Nuclear Power by 2028 | KeepTrack Space Brief

White House Orders Space Nuclear Power by 2028 | KeepTrack Space Brief

White House directs NASA and Pentagon to field space nuclear power systems by 2028, with DoD demonstration required by 2031. Game-changer for military satellite power budgets.