Showing default

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.

Loading next visibility...

Iframe embed code

<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

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

Identifier

25940, 1999-057A

Orbit

SSO

Country

Unknown / 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: 12 hours ago

TLE from 12 hours ago

0 CBERS 1
1 25940U 99057A   25365.01829557  .00000450  00000-0  16772-3 0  9993
2 25940  98.8487   4.8419 0005707 126.9568 233.2141 14.36915095373369

Epoch: 2025-12-31T00:26Z

TLE epoch observation values (Epoch: 2025-12-31T00:26:20.737Z)

Latitude

0.00003°

Longitude

-101.43775°

Altitude

774.087 km

Speed

7.466 km/s

True Right ascension

00h 19m 22s

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

12:07:51

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

769.929 km

Perigee altitude

761.775 km

Semi-major axis

7,143.989 km

Eccentricity

0.00057

Inclination

98.8487°

RAAN

4.8419°

Arg. of periapsis

126.9568°

True anomaly

233.16175°

Mean anomaly

233.2141°

Eccentric anomaly

233.18792°

Mean motion

3.59445 °/min

Orbital period

100.15 mins

BSTAR

0.00016772

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

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

CZ-4 DEB, 26251 (Decayed)

CBERS 1 DEB, 32466 (Decayed)

CZ-4 DEB, 26218 (Decayed)

CZ-4 DEB, 26657 (Decayed)

CZ-4 DEB, 26131 (Decayed)

CZ-4 DEB, 26285 (Decayed)

CZ-4 DEB, 35324

CZ-4 DEB, 26755 (Decayed)

CZ-4 DEB, 27688

CZ-4 DEB, 26228 (Decayed)

CZ-4 DEB, 26255 (Decayed)

CZ-4 DEB, 26305 (Decayed)

CZ-4 DEB, 26173 (Decayed)

CBERS 1 DEB, 31585 (Decayed)

CBERS 1 DEB, 30786 (Decayed)

Did you know?

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

Click here to try in Sandbox

CBERS 1 Visibility forecast

Loading observer location...
Set Observer location

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	2025-12-31 12:42:35.023Z	24.136° NE	2025-12-31 12:47:35.023Z	112.403° ESE	38.429°	2025-12-31 12:51:35.023Z	175.589° S
5 mins	2025-12-31 14:23:35.023Z	329.069° NNW	2025-12-31 14:25:35.023Z	302.011° NW	17.476°	2025-12-31 14:28:35.023Z	261.173° W
8 mins	2025-12-31 23:57:35.023Z	156.191° SSE	2026-01-01 00:01:35.023Z	68.908° E	43.753°	2026-01-01 00:05:35.023Z	351.611° N
6 mins	2026-01-01 12:08:35.023Z	52.423° ENE	2026-01-01 12:11:35.023Z	98.434° ESE	22.022°	2026-01-01 12:14:35.023Z	141.429° SSE

Items per page:

1–4 of 4 items

of 1 page

Co-orbital & Co-planar RSOs

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

Please sign-in to view Co-orbital & Co-planar RSOs.

Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

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

Authenticating...

Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in descending order

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: 12 hours ago

TLE from 12 hours ago

TLE epoch observation values (Epoch: 2025-12-31T00:26:20.737Z)

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: 12 hours ago