RADUGA 21 (18631)

COSPAR: 1987-100A | Alt Name: Raduga

Image

Additional Sources

Launch Details

Launch Date

December 10, 1987

Launch Site

Tyuratam Missile and Space Complex

Launch Pad

LC200/40

Launch Vehicle

Proton-K/DM-2

Orbital Elements

NORAD ID

18631

International Designator

1987-100A

Epoch

Fri, 03 Jul 2026 08:24:13 GMT

Apogee

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Perigee

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Inclination

11.28°

Right Ascension

325.17°

Eccentricity

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Argument of Perigee

298.50°

Period

1434.93 min

Mean Motion

1.00 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

RADUGA 21

Alternative Name

Raduga

Type

Payload

Status

Non-operational

Owner

UNKS

Country

USSR

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs

1 18631U 87100A   26184.35015522 -.00000223  00000-0  00000-0 0  9997

2 18631  11.2828 325.1702 0000986 298.4976  59.9522  1.00353246141249

Source: Celestrak

Summary

RADUGA 21, also known as Raduga, is a communication satellite with the OBJECT_ID 1987-100A and NORAD_CAT_ID 18631. It was launched on December 10, 1987, from TYMSC LC200/40 using a Proton-K/DM-2 launch vehicle. The satellite measures 5.5 meters in length, has a diameter of 2.5 meters, and spans 9.5 meters. Its dry mass is 1800 kg with a launch mass of 1965 kg. It was manufactured by NPOPM and equipped with 3 Delta-1 C-Band transponders and 3 Delta-2 C-Band transponders for its communication mission. The satellite's power source includes two deployable solar arrays and batteries, and it features a step cylindrical shape with two panels (Step Cyl + 2 Pan). RADUGA 21 operated for approximately three years following its launch date.

Physical Characteristics

Length

5.5

Diameter

2.5

Span

9.5

Dry Mass

1800

Launch Mass

1965

Shape

Step Cyl + 2 Pan

Radar Cross Section

3.9811

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

Gran' No. 32L

Purpose

Communication

Mission

Communication

Manufacturer

NPOPM

Life Expectancy

3 years

Bus

Raduga

Configuration

KAUR-3

Motor

Unknown

Equipment

3 Delta-1 C-Band transponders, 3 Delta-2 C-Band transponders

Power System

2 deployable solar arrays, batteries

ADCS

Unknown

Transmitter Frequency

Unknown

Map

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