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CBERS 1, 25940

Orbit data source: Space-Track

CBERS 1, 25940 is a CN and BR payload satellite in SSO that was launched on Thu, 14 Oct 1999 UTC via a CHANG ZHENG 4B launch vehicle from the Taiyaun Space Center, China (TSC). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.

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https://www.satcat.com/sats-embedded/25940?theme=dark&initialShowStats=false

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Identifier

25940, 1999-057A

Orbit

SSO

Country

CN / CHBZ

BR / CHBZ

Related business

China Aerospace Science and Technology Corporation (CASC) (CN)

Manufacturer

CAST

Mission

Civil Imaging

Bus & Motor

ZY, AOCS 20N

Mass

1,540 kg wet, ~1,450 kg dry

Launch date (UTC)

1999-10-14 (26 years ago)

Launch vehicle

CHANG ZHENG 4B

Launch site

Taiyaun Space Center, China (TSC)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 1 Pan, 4.5 m

Radar Cross Section

9.469 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 9 hours ago

TLE from 9 hours ago

0 CBERS 1
1 25940U 99057A   26090.26103623  .00000272  00000-0  10778-3 0  9997
2 25940  98.8518  97.6182 0004168 217.8246 142.2647 14.36972039386325

Epoch: 2026-03-31T06:15Z

TLE epoch observation values (Epoch: 2026-03-31T06:15:53.530Z)

Latitude

-0.00001°

Longitude

175.00439°

Altitude

773.81 km

Speed

7.466 km/s

True Right ascension

06h 30m 28s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

21:13:08

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

768.641 km

Perigee altitude

762.686 km

Semi-major axis

7,143.8 km

Eccentricity

0.00042

Inclination

98.8518°

RAAN

97.6182°

Arg. of periapsis

217.8246°

True anomaly

142.29392°

Mean anomaly

142.2647°

Eccentric anomaly

142.27931°

Mean motion

3.59459 °/min

Orbital period

100.15 mins

BSTAR

0.00010778

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Other satellites on launch #57 in the year 1999 (1999-10-14 UTC)

CZ-4 DEB, 26327 (Decayed)

CZ-4 DEB, 26275 (Decayed)

CZ-4 DEB, 26220

CZ-4 DEB, 26329

CZ-4 DEB, 26431 (Decayed)

CZ-4 DEB, 26169 (Decayed)

CZ-4 DEB, 26457 (Decayed)

CZ-4 DEB, 26757 (Decayed)

CZ-4 DEB, 26139 (Decayed)

CZ-4 DEB, 26454

CZ-4 DEB, 26426 (Decayed)

CZ-4 DEB, 26207

CZ-4 DEB, 26753 (Decayed)

CZ-4 DEB, 26661

CZ-4 DEB, 26133 (Decayed)

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CBERS 1 Visibility forecast

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Span	Click to sort rows by Start time (UTC) header in descending order	Start Az.	Max El. time (UTC)	Max El. Az.	Max El.	End time (UTC)	End Az.
6 mins	2026-03-31 23:08:30.920Z	99.196° ESE	2026-03-31 23:11:30.920Z	58.952° ENE	17.513°	2026-03-31 23:14:30.920Z	21.79° NNE
8 mins	2026-04-01 00:46:30.920Z	188.472° SSW	2026-04-01 00:49:30.920Z	244.927° WSW	38.635°	2026-04-01 00:54:30.920Z	335.873° NNW
8 mins	2026-04-01 12:56:30.920Z	32.033° NE	2026-04-01 12:59:30.920Z	86.224° E	36.96°	2026-04-01 13:04:30.920Z	174.835° S
5 mins	2026-04-01 14:36:30.920Z	325.206° NNW	2026-04-01 14:38:30.920Z	295.905° NW	18.595°	2026-04-01 14:41:30.920Z	256.087° W

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out CBERS 1, 25940 on other resources

View CBERS 1, 25940 on NASA - NSSDCA Website

View CBERS 1, 25940 on Heavens-Above

View CBERS 1, 25940 on Keep Track

View CBERS 1, 25940 on Celestrak

View CBERS 1, 25940 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

CBERS 1, 25940

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 9 hours ago

TLE from 9 hours ago

TLE epoch observation values (Epoch: 2026-03-31T06:15:53.530Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #57 in the year 1999 (1999-10-14 UTC)

CBERS 1 Visibility forecast

Co-orbital & Co-planar RSOs

Check out CBERS 1, 25940 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 9 hours ago