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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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<iframe src="https://www.satcat.com/sats-embedded/25940?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

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: 15 hours ago

TLE from 15 hours ago

0 CBERS 1
1 25940U 99057A   26226.03784478  .00000067  00000-0  38365-4 0  9991
2 25940  98.8503 237.2328 0004885 174.2959 185.8283 14.37023920405829

Epoch: 2026-08-14T00:54Z

TLE epoch observation values (Epoch: 2026-08-14T00:54:29.788Z)

Latitude

-0.00004°

Longitude

-98.86013°

Altitude

774.755 km

Speed

7.465 km/s

True Right ascension

15h 48m 55s

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

06:20:56

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

768.981 km

Perigee altitude

762.001 km

Semi-major axis

7,143.628 km

Eccentricity

0.00049

Inclination

98.8503°

RAAN

237.2328°

Arg. of periapsis

174.2959°

True anomaly

185.82262°

Mean anomaly

185.8283°

Eccentric anomaly

185.82546°

Mean motion

3.59472 °/min

Orbital period

100.15 mins

BSTAR

0.000038365

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

CZ-4 DEB, 26275 (Decayed)

CBERS 1 DEB, 32076 (Decayed)

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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

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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.
9 mins	2026-08-15 00:25:05.282Z	149.486° SSE	2026-08-15 00:30:05.282Z	54.118° ENE	39.942°	2026-08-15 00:34:05.282Z	356.064° N
5 mins	2026-08-15 12:37:05.282Z	60.123° ENE	2026-08-15 12:39:05.282Z	87.624° E	17.978°	2026-08-15 12:42:05.282Z	129.66° SE
8 mins	2026-08-15 14:15:05.282Z	356.573° N	2026-08-15 14:19:05.282Z	274.113° WNW	35.907°	2026-08-15 14:23:05.282Z	217.957° SW

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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: 15 hours ago

TLE from 15 hours ago

TLE epoch observation values (Epoch: 2026-08-14T00:54:29.788Z)

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: 15 hours ago