SPACENET 4 R/B [PAM-D] (21229)

COSPAR: 1991-028C | Alt Name: Delta 204 Stage 3

Image

Additional Sources

Launch Details

Launch Date

April 13, 1991

Launch Site

Cape Canaveral Space Force Station

Launch Pad

LC17B

Launch Vehicle

Delta 7925

Orbital Elements

NORAD ID

21229

International Designator

1991-028C

Epoch

Fri, 03 Jul 2026 08:34:07 GMT

Apogee

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Perigee

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Inclination

22.03°

Right Ascension

274.54°

Eccentricity

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Argument of Perigee

246.50°

Period

655.43 min

Mean Motion

2.20 rev/day

Latitude

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Longitude

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Altitude

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Velocity

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Polar Plot

3D Visualization

Basic Satellite Info

Name

SPACENET 4 R/B [PAM-D]

Alternative Name

Delta 204 Stage 3

Type

Rocket Body

Status

Space Junk

Owner

MDAC

Country

United States

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs

1 21229U 91028C   26184.35702752 -.00000046  00000-0  00000-0 0  9999

2 21229  22.0319 274.5420 6903879 246.5023  23.1024  2.19703360282648

Source: Celestrak

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

2.3

Diameter

1.1

Span

2.3

Dry Mass

132

Launch Mass

2141

Shape

Sphere + Cone

Radar Cross Section

3.0144

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

Star 48B S/N 10067-18

Purpose

Unknown

Mission

Unknown

Manufacturer

THKE

Life Expectancy

Unknown

Bus

Star 48

Configuration

Unknown

Motor

Unknown

Equipment

Unknown

Power System

Unknown

ADCS

Unknown

Transmitter Frequency

Unknown

Map

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