INTELSAT 604 (IS-604) (20667)

COSPAR: 1990-056A | Alt Name: INTELSAT 604

Image
INTELSAT 604 (IS-604) Satellite Image
Additional Sources
Launch Details

Launch Date

June 23, 1990

Launch Pad

LC40

Launch Vehicle

Commercial Titan 3

Orbital Elements

NORAD ID

20667

International Designator

1990-056A

Epoch

Fri, 03 Jul 2026 18:12:02 GMT

Apogee

Calculating...

Perigee

Calculating...

Inclination

14.63°

Right Ascension

9.84°

Eccentricity

Calculating...

Argument of Perigee

316.93°

Period

1462.88 min

Mean Motion

0.98 rev/day

Latitude

Calculating...

Longitude

Calculating...

Altitude

Calculating...

Velocity

Calculating...

Polar Plot
3D Visualization
Basic Satellite Info

Name

INTELSAT 604 (IS-604)

Alternative Name

INTELSAT 604

Type

Payload

Status

Non-operational

Owner

INTEL

Country

INTELSAT

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs
1 20667U 90056A   26184.75835690 -.00000200  00000-0  00000-0 0  9998
2 20667  14.6298   9.8389 0005134 316.9266  45.6433  0.98436056 46642

Source: Celestrak

Summary
INTELSAT 604 (IS-604) is a communication satellite with a bus configuration HS-389, manufactured by HSES and launched on June 23, 1990, from LC40 at AFETR using a Commercial Titan 3 launch vehicle. It has dimensions of 11.8 meters in length and diameter, spans 11.8 meters, and had a launch mass of 4,286 kilograms with a dry mass of 1,906 kilograms. The satellite is equipped with 38 C-band transponders and 10 Ku-band transponders for communication purposes, powered by solar cells and batteries. It has an operational lifetime of 13 years and belongs to INTEL as its owner. Its shape is cylindrical with a radar cross-section (RCS) of 9.9624 square meters.
Physical Characteristics

Length

11.8

Diameter

3.6

Span

11.8

Dry Mass

1906

Launch Mass

4286

Shape

Cyl

Radar Cross Section

9.9624

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

INTELSAT VI F-4

Purpose

Communication

Mission

Communication

Manufacturer

HSES

Life Expectancy

13 years

Bus

HS-389

Configuration

HS-389

Motor

R-4D-12

Equipment

38 C-band transponders, 10 Ku-band transponders

Power System

Solar cells (body mounted and drop-skirt), batteries

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.

Space Brief 27 Apr 2025

Space Brief 27 Apr 2025

Today's highlights include SpaceX's dual Starlink launches, NASA's progress on the Dragonfly mission to Titan, and delays in Starlink's Indian market entry.

Space Brief 9 Sep 2025

Space Brief 9 Sep 2025

Explore the latest advancements in satellite technology, military satellite applications, and collaborative efforts in hypersonic vehicle tracking. Discover the transformative power of new deals shaping global communication networks.

The Day a Giant Space Balloon United the Cold War

The Day a Giant Space Balloon United the Cold War

When a 135-foot inflatable mirror bounced a radio signal from England to Russia, it became the first joint US-Soviet space venture - and changed how we think about satellite communication.

Space Brief 1 Mar 2025

Space Brief 1 Mar 2025

Today's Space Brief covers reentries, the impact of NOAA dismissals on space weather tracking, a strategic academic partnership probing cosmic mysteries, and a newly unveiled space motto.

X Report 28 Mar 2025

X Report 28 Mar 2025

SpaceX sees another successful Starlink launch and faces strategic contract discussions as NASA pivots to reliable Dragon missions.

X Report 31 Mar 2025

X Report 31 Mar 2025

New experiments in space agriculture begin with Fram2 mission, a historic polar orbit flight, and a Starlink launch postponement.

Jonathan's Space Report

Jonathan's Space Report

Jonathan's Space Report is a comprehensive resource for space launch and satellite data, compiled by astrophysicist Dr. Jonathan McDowell.

Lagrange Points

Lagrange Points

Five spots in the Earth-Sun system where the gravitational tug of two massive bodies and the pull of circular motion all cancel out, creating gravitational parking spaces where spacecraft can sit for decades with almost no fuel.