EUTELSAT 1-F4 (ECS 4) (18351)

COSPAR: 1987-078B | Alt Name: Eutelsat I F-4

Image

Additional Sources

Launch Details

Launch Date

September 16, 1987

Launch Site

FRGUI

Launch Pad

ELA1

Launch Vehicle

Ariane 3

Orbital Elements

NORAD ID

18351

International Designator

1987-078B

Epoch

Sat, 04 Jul 2026 01:13:27 GMT

Apogee

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Perigee

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Inclination

13.82°

Right Ascension

342.01°

Eccentricity

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Argument of Perigee

45.72°

Period

1459.13 min

Mean Motion

0.99 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

EUTELSAT 1-F4 (ECS 4)

Alternative Name

Eutelsat I F-4

Type

Payload

Status

Non-operational

Owner

EUTEL

Country

EUTELSAT

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs

1 18351U 87078B   26185.05101251 -.00000027  00000-0  00000-0 0  9995

2 18351  13.8163 342.0082 0010308  45.7246 127.7588  0.98688848126928

Source: Celestrak

Summary

EUTELSAT 1-F4 (ECS 4), also known as Eutelsat I F-4, is a communication satellite launched on September 16, 1987, from the Guiana Space Centre using an Ariane 3 launch vehicle. The spacecraft has dimensions of 2.4 meters in length and 2.2 meters in diameter with a span of 13.8 meters. It was manufactured by BAES and equipped with either 10 or 12 Ku-band transponders, depending on its operational phase. The satellite has a dry mass of 539 kilograms and a launch mass of 655 kilograms. Its power is provided by two deployable solar arrays and batteries, and it was designed to operate for approximately seven years in a communication mission. The motor used was the Mage 2, and its shape is described as Box + 2 Pan with an RCS value of 3.981. Owned by EUTEL, this satellite operated from launch until its stable date on September 16, 1987.

Physical Characteristics

Length

2.4

Diameter

2.2

Span

13.8

Dry Mass

539

Launch Mass

655

Shape

Box + 2 Pan

Radar Cross Section

3.981

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

ECS 4

Purpose

Communication

Mission

Communication

Manufacturer

BAES

Life Expectancy

7 years

Bus

ECS

Configuration

ECS-Bus

Motor

Mage 2

Equipment

10 (+2) Ku-band transponders (#1); 12 (+2) Ku-band transponders (# 2-5)

Power System

2 deployable solar arrays, batteries

ADCS

Unknown

Transmitter Frequency

Unknown

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