CBERS 1 (ZY 1A) (25940)

COSPAR: 1999-057A | Alt Name: Zi Yuan 1-01

Image

Additional Sources

Launch Details

Launch Date

October 14, 1999

Launch Site

TAISC

Launch Pad

LC7

Launch Vehicle

Chang Zheng 4B

Orbital Elements

NORAD ID

25940

International Designator

1999-057A

Epoch

Sat, 04 Jul 2026 00:38:34 GMT

Apogee

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Perigee

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Inclination

98.85°

Right Ascension

195.06°

Eccentricity

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Argument of Perigee

319.24°

Period

100.21 min

Mean Motion

14.37 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

CBERS 1 (ZY 1A)

Alternative Name

Zi Yuan 1-01

Type

Payload

Status

Unknown

Owner

CAST/INPE

Country

China

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs

1 25940U 99057A   26185.02678853  .00000193  00000-0  81039-4 0  9999

2 25940  98.8484 195.0619 0004089 319.2371  40.8508 14.37010949399937

Source: Celestrak

Summary

CBERS 1 (ZY 1A), also known as Zi Yuan 1-01, is an Earth Observation satellite launched on October 14, 1999, from TAISC Launch Pad LC7 using the Chang Zheng 4B launch vehicle. The spacecraft has a length of 1.8 meters and a diameter of 2 meters with a span of 9 meters. It operates on the Phoenix-Eye-1 bus configuration and was manufactured by CAST for use in Earth Observation missions under ownership of CAST/INPE. Equipped with various sensors including CCD, WFI, IRMSS (#01, 02), and HRC (#02B) along with a deployable solar array and batteries for power supply, the satellite has a launch mass of 1540 kg and a dry mass of 1450 kg. Its shape is described as Box + Pan with an RCS value of 3.2248, and its mission lifetime was planned to be around 2 years.

Physical Characteristics

Length

1.8

Diameter

Span

Dry Mass

1450

Launch Mass

1540

Shape

Box + Pan

Radar Cross Section

3.2248

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

ZY-1 01

Purpose

Earth Observation

Mission

Earth Observation

Manufacturer

CAST

Life Expectancy

2 years

Bus

Configuration

Phoenix-Eye-1 bus

Motor

AOCS 20N

Equipment

CCD, WFI, IRMSS (#01, 02), HRC (#02B)

Power System

Deployable solar array, batteries

ADCS

Unknown

Transmitter Frequency

Unknown

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