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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 (27 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: 6 hours ago

TLE from 6 hours ago

0 CBERS 1
1 25940U 99057A   26127.86127978  .00000147  00000-0  65344-4 0  9994
2 25940  98.8498 136.2846 0005985 112.3556 247.8264 14.36988845391729

Epoch: 2026-05-07T20:40Z

TLE epoch observation values (Epoch: 2026-05-07T20:40:14.572Z)

Latitude

-0.00007°

Longitude

-39.47745°

Altitude

773.015 km

Speed

7.467 km/s

True Right ascension

09h 05m 08s

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

10:47:39

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

769.883 km

Perigee altitude

761.332 km

Semi-major axis

7,143.744 km

Eccentricity

0.0006

Inclination

98.8498°

RAAN

136.2846°

Arg. of periapsis

112.3556°

True anomaly

247.76291°

Mean anomaly

247.8264°

Eccentric anomaly

247.79465°

Mean motion

3.59463 °/min

Orbital period

100.15 mins

BSTAR

0.000065344

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

CZ-4 DEB, 26326 (Decayed)

CZ-4 DEB, 35321 (Decayed)

CZ-4 DEB, 35328 (Decayed)

CZ-4B DEB, 49250 (Decayed)

CZ-4 DEB, 26431 (Decayed)

CZ-4 DEB, 26453 (Decayed)

CZ-4 DEB, 26322 (Decayed)

CZ-4 DEB, 26653 (Decayed)

CBERS 1 DEB, 32468 (Decayed)

CBERS 1 DEB, 39596 (Decayed)

CZ-4 DEB, 26242 (Decayed)

CZ-4 DEB, 26441 (Decayed)

CZ-4 DEB, 26285 (Decayed)

CZ-4 DEB, 26751 (Decayed)

CZ-4 DEB, 26428 (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	2026-05-08 12:19:19.766Z	56.692° ENE	2026-05-08 12:22:19.766Z	98.07° ESE	17.813°	2026-05-08 12:25:19.766Z	135.989° SSE
7 mins	2026-05-08 13:58:19.766Z	352.561° N	2026-05-08 14:01:19.766Z	286.585° WNW	36.626°	2026-05-08 14:05:19.766Z	218.939° SW
6 mins	2026-05-08 23:34:19.766Z	106.636° ESE	2026-05-08 23:36:19.766Z	74.493° E	24.027°	2026-05-08 23:40:19.766Z	14.538° NNE
7 mins	2026-05-09 01:12:19.766Z	205.627° SW	2026-05-09 01:15:19.766Z	255.653° W	29.605°	2026-05-09 01:19:19.766Z	322.546° NNW

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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: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2026-05-07T20:40:14.572Z)

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: 6 hours ago