SL-8 R/B (21015)

COSPAR: 1990-111B | Alt Name: Kosmos-3M 26-203 Stage 2

Image
SL-8 R/B Satellite Image
Additional Sources
Launch Details

Launch Date

December 10, 1990

Launch Site

PLMSC

Launch Pad

LC133/3

Launch Vehicle

Kosmos 11K65M

Orbital Elements

NORAD ID

21015

International Designator

1990-111B

Epoch

Sat, 04 Jul 2026 00:52:28 GMT

Apogee

Calculating...

Perigee

Calculating...

Inclination

74.05°

Right Ascension

194.15°

Eccentricity

Calculating...

Argument of Perigee

357.33°

Period

100.19 min

Mean Motion

14.37 rev/day

Latitude

Calculating...

Longitude

Calculating...

Altitude

Calculating...

Velocity

Calculating...

Polar Plot
3D Visualization
Basic Satellite Info

Name

SL-8 R/B

Alternative Name

Kosmos-3M 26-203 Stage 2

Type

Rocket Body

Status

Space Junk

Owner

RVSN

Country

USSR

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs
1 21015U 90111B   26185.03643967  .00000097  00000-0  41077-4 0  9990
2 21015  74.0478 194.1495 0021626 357.3254   2.7781 14.37326639960228

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

5.7404

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

S3M

Purpose

Unknown

Mission

Unknown

Manufacturer

POL

Life Expectancy

Unknown

Bus

S3

Configuration

Unknown

Motor

Unknown

Equipment

Unknown

Power System

Unknown

ADCS

Unknown

Transmitter Frequency

Unknown

Map
This tool will help you track the satellite's position and predict its upcoming passes over your location. Simply input the coordinates or click the geolocation button to get started.
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration

Satellite Articles

View All Posts »

Learn more about satellites and other related topics.

X Report 15 Dec 2024

X Report 15 Dec 2024

SpaceX faces a launch delay at Cape Canaveral and continues to advance Starship development.

Space Brief 7 Dec 2025

Space Brief 7 Dec 2025

Today's highlights include a record-breaking event at the International Space Station, significant funding for hypersonic missile production, and several key military developments impacting space strategy.

X Report 7 Mar 2025

X Report 7 Mar 2025

Starship Flight 8 ends with mixed results as SpaceX successfully catches Super Heavy booster but loses the upper stage in a fiery breakup.

X Report 3 Jun 2025

X Report 3 Jun 2025

SpaceX gears up for an exciting week with multiple launches, including a crewed mission and the rescheduled Starlink delivery. Meanwhile, ULA faces criticism from the Space Force over delays in its Vulcan rocket program.

Space Brief 2 Sep 2025

Space Brief 2 Sep 2025

Today's brief covers key topics such as SpaceX's latest Starlink launch, the European Space Agency's new initiatives, and Space Force's integration of AI into its operations.

X Report 22 Nov 2025

X Report 22 Nov 2025

Major challenges emerged with SpaceX's next-generation Starship booster testing, while Starlink deployments continued with successful launches.

Space Brief 4 Jul 2025

Space Brief 4 Jul 2025

Explore today's key space events including China's satellite launch, ULA's Vulcan rocket preparations, significant budget bills from Congress, and discussions on lunar business prospects.

X Report 11 Mar 2025

X Report 11 Mar 2025

A week of highs and lows for SpaceX, including weather-related delays and a return to Falcon launches.