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YAOGAN 21, 40143

Orbit data source: Space-Track

YAOGAN 21, 40143 is a payload satellite owned by PLA GAD (CN) in SSO that was launched on Mon, 08 Sep 2014 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/40143?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/40143?theme=dark&initialShowStats=false

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Identifier

40143, 2014-053A

Orbit

SSO

Country

CN / PRC

Related business

Equipment Development Department of the Central Military Commission (PLA) (CN)

Manufacturer

CAST

Mission

Operational Defense Imaging

Bus & Motor

JB-10, Unknown motor

Mass

~3,000 kg wet, ~3,000 kg dry

Launch date (UTC)

2014-09-08 (12 years ago)

Launch vehicle

CHANG ZHENG 4B

Launch site

Taiyaun Space Center, China (TSC)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan, 4.0 m

Radar Cross Section

9.231 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 12 hours ago

TLE from 12 hours ago

0 YAOGAN 21
1 40143U 14053A   26265.93630675  .00003348  00000-0  12715-3 0  9992
2 40143  97.1400 302.0070 0009675 102.5223 257.7100 15.27433601669879

Epoch: 2026-09-22T22:28Z

TLE epoch observation values (Epoch: 2026-09-22T22:28:16.903Z)

Latitude

0.00002°

Longitude

-36.85806°

Altitude

488.015 km

Speed

7.62 km/s

True Right ascension

20h 08m 01s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow 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

03:46:45

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

487.068 km

Perigee altitude

473.797 km

Semi-major axis

6,858.569 km

Eccentricity

0.00097

Inclination

97.14°

RAAN

302.007°

Arg. of periapsis

102.5223°

True anomaly

257.6017°

Mean anomaly

257.71°

Eccentric anomaly

257.65585°

Mean motion

3.82114 °/min

Orbital period

94.21 mins

BSTAR

0.00012715

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Other satellites on launch #53 in the year 2014 (2014-09-08 UTC)

CZ-4B R/B, 40145 (Decayed)

TIANTUO 2, 40144 (Decayed)

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YAOGAN 21 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.
5 mins	2026-09-23 14:46:03.376Z	42.383° NE	2026-09-23 14:48:03.376Z	82.58° E	26.548°	2026-09-23 14:51:03.376Z	151.565° SSE
6 mins	2026-09-24 02:54:03.376Z	190.6° SSW	2026-09-24 02:57:03.376Z	283.48° WNW	44.434°	2026-09-24 03:00:03.376Z	336° 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 YAOGAN 21, 40143 on other resources

View YAOGAN 21, 40143 on NASA - NSSDCA Website

View YAOGAN 21, 40143 on Heavens-Above

View YAOGAN 21, 40143 on Keep Track

View YAOGAN 21, 40143 on Celestrak

View YAOGAN 21, 40143 on Gunter's Space Page

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

YAOGAN 21, 40143

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: 2026-09-22T22:28:16.903Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #53 in the year 2014 (2014-09-08 UTC)

YAOGAN 21 Visibility forecast

Co-orbital & Co-planar RSOs

Check out YAOGAN 21, 40143 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 12 hours ago