JCSAT-4A (25630)

COSPAR: 1999-006A | Alt Name: JCSAT 4A

Image

Additional Sources

Launch Details

Launch Date

February 16, 1999

Launch Site

Cape Canaveral Space Force Station

Launch Pad

SLC36A

Launch Vehicle

Atlas IIAS

Orbital Elements

NORAD ID

25630

International Designator

1999-006A

Epoch

Sat, 04 Jul 2026 00:02:48 GMT

Apogee

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Perigee

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Inclination

9.72°

Right Ascension

55.77°

Eccentricity

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Argument of Perigee

45.09°

Period

1457.30 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

JCSAT-4A

Alternative Name

JCSAT 4A

Type

Payload

Status

Non-operational

Owner

JSAT

Country

Japan

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs

1 25630U 99006A   26185.00195141 -.00000219  00000-0  00000-0 0  9996

2 25630   9.7203  55.7714 0023992  45.0851 149.7541  0.98812847 16371

Source: Celestrak

Summary

JCSAT-4A (also known as JCSAT 4A) is a communication satellite launched on February 16, 1999, from the Cape Canaveral Air Force Station's SLC36A pad using an Atlas IIAS launch vehicle. The spacecraft measures 6 meters in length and has a diameter of 3.4 meters with a span of 26 meters when its solar arrays are deployed. Its dry mass is 1226 kilograms, and it was launched with a total mass of 2900 kilograms. JCSAT-4A is equipped with 32 active Ku-band transponders for communication purposes and uses two deployable solar arrays along with batteries for power supply. The satellite's shape consists of a box structure augmented by two panels, and it was manufactured by HSES under the HS-601 bus configuration for JSAT Corporation, designed to provide communication services.

Physical Characteristics

Length

Diameter

3.4

Span

Dry Mass

1226

Launch Mass

2900

Shape

Box + 2 Pan

Radar Cross Section

31.6228

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

JCSAT 6

Purpose

Communication

Mission

Communication

Manufacturer

HSES

Life Expectancy

Unknown

Bus

HS-601

Configuration

HS-601

Motor

R-4D-11-300

Equipment

32 active Ku-band transponders

Power System

2 deployable solar arrays, batteries

ADCS

Unknown

Transmitter Frequency

Unknown

Map

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Longitude

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