SL-8 R/B (21667)

COSPAR: 1991-059B | Alt Name: Kosmos-3M 78-429 Stage 2

Image

Additional Sources

Launch Details

Launch Date

August 22, 1991

Launch Site

PLMSC

Launch Pad

LC132/1

Launch Vehicle

Kosmos 11K65M

Orbital Elements

NORAD ID

21667

International Designator

1991-059B

Epoch

Fri, 03 Jul 2026 22:09:22 GMT

Apogee

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Perigee

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Inclination

82.91°

Right Ascension

68.63°

Eccentricity

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Argument of Perigee

46.29°

Period

104.71 min

Mean Motion

13.75 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

SL-8 R/B

Alternative Name

Kosmos-3M 78-429 Stage 2

Type

Rocket Body

Status

Space Junk

Owner

RVSN

Country

USSR

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs

1 21667U 91059B   26184.92317323  .00000047  00000-0  33102-4 0  9991

2 21667  82.9052  68.6348 0021770  46.2892 324.6438 13.75281173749483

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

4.2

Diameter

2.4

Span

4.2

Dry Mass

1434

Launch Mass

1434

Shape

Cyl

Radar Cross Section

4.1298

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

S3M

Purpose

Unknown

Mission

Unknown

Manufacturer

POL

Life Expectancy

Unknown

Bus

Configuration

Unknown

Motor

Unknown

Equipment

Unknown

Power System

Unknown

ADCS

Unknown

Transmitter Frequency

Unknown

Map

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