STTW-4 (20473)

COSPAR: 1990-011A | Alt Name: Zhongxing 3

Image

Additional Sources

Launch Details

Launch Date

February 4, 1990

Launch Site

XICLF

Launch Pad

LC3

Launch Vehicle

Chang Zheng 3

Orbital Elements

NORAD ID

20473

International Designator

1990-011A

Epoch

Fri, 03 Jul 2026 21:55:21 GMT

Apogee

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Perigee

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Inclination

14.15°

Right Ascension

346.29°

Eccentricity

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Argument of Perigee

161.22°

Period

1436.01 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

STTW-4

Alternative Name

Zhongxing 3

Type

Payload

Status

Non-operational

Owner

CHIS

Country

China

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs

1 20473U 90011A   26184.91344698 -.00000300  00000-0  00000-0 0  9996

2 20473  14.1476 346.2903 0002901 161.2232 201.2053  1.00277815133211

Source: Celestrak

Summary

STTW-4 (also known as Zhongxing 3) is a communication satellite launched by CHIS on February 4, 1990, from Xichang Satellite Launch Center using the Chang Zheng 3 launch vehicle. The satellite, manufactured by CAST, operates with a DFH-2 Bus configuration and has dimensions of 1.6 meters in length, 2.1 meters in diameter, and 2.1 meters in span. It weighs 460 kilograms at launch and is equipped with two C-band transponders for communication purposes. Power is provided by solar cells and batteries. The satellite features a cylindrical body augmented with antennas (Cyl + Ant) and has an RCS value of 15.8489.

Physical Characteristics

Length

1.6

Diameter

2.1

Span

2.1

Dry Mass

460

Launch Mass

460

Shape

Cyl + Ant

Radar Cross Section

15.8489

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

DFH 2A

Purpose

Communication

Mission

Communication

Manufacturer

CAST

Life Expectancy

Unknown

Bus

DFH-2

Configuration

DFH-2 Bus

Motor

AKM

Equipment

2 C-band transponders

Power System

Solar cells, batteries

ADCS

Unknown

Transmitter Frequency

Unknown

Map

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Latitude

Longitude

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Azimuth Elevation Time (Local)

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