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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

Last TLE update

12 hours ago

Origin

China Aerospace Science and Technology Corporation (CASC) (Unknown / CHBZ)

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

TLE from 12 hours ago

0 CBERS 1
1 25940U 99057A   25199.49266046  .00000140  00000-0  63149-4 0  9995
2 25940  98.8400 194.7727 0003789 260.6534  99.4223 14.36795477349593

Epoch: 2025-07-18T11:49Z

TLE epoch observation values (Epoch: 2025-07-18T11:49:25.863Z)

Latitude

-0.00004°

Longitude

80.87161°

Altitude

772.483 km

Speed

7.468 km/s

True Right ascension

12h 59m 05s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

50.09967°

Longitude

70.72023°

Altitude

779.441 km

Speed

7.468 km/s

Apparent Right ascension

03h 27m 52s

Apparent Declination

73° 00' 25"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

12:33:11

Azimuth

346.928° N

Elevation

26.841°

Doppler factor

Orbital elements

Apogee altitude

768.955 km

Perigee altitude

763.541 km

Semi-major axis

7,144.385 km

Eccentricity

0.00038

Inclination

98.84°

RAAN

194.7727°

Arg. of periapsis

260.6534°

True anomaly

99.46513°

Mean anomaly

99.4223°

Eccentric anomaly

99.44372°

Mean motion

3.59415 °/min

Orbital period

100.16 mins

BSTAR

0.000063149

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

CZ-4 DEB, 26138 (Decayed)

CZ-4 DEB, 26139 (Decayed)

CZ-4 DEB, 26140

CZ-4 DEB, 26141 (Decayed)

CZ-4 DEB, 26142

CZ-4 DEB, 26143

CZ-4 DEB, 26144 (Decayed)

CZ-4 DEB, 26145 (Decayed)

CZ-4 DEB, 26148 (Decayed)

CZ-4 DEB, 26149 (Decayed)

CZ-4 DEB, 26150

CZ-4 DEB, 26151

CZ-4 DEB, 26152

CZ-4 DEB, 26153 (Decayed)

CBERS 1 Visibility forecast

Observer location: undefined°, undefined°

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.
7 mins	2025-07-19 11:49:31.427Z	45.627° ENE	2025-07-19 11:52:31.427Z	92.712° ESE	25.981°	2025-07-19 11:56:31.427Z	152.836° SSE
7 mins	2025-07-19 13:28:31.427Z	344.493° N	2025-07-19 13:31:31.427Z	295.764° NW	27.681°	2025-07-19 13:35:31.427Z	234.671° WSW
8 mins	2025-07-19 23:03:31.427Z	132.298° SE	2025-07-19 23:07:31.427Z	58.39° ENE	32.627°	2025-07-19 23:11:31.427Z	2.89° NNE

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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Authenticating...

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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

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