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SHIYAN 4 (SY-4), 37931

Orbit data source: Space-Track

SHIYAN 4 (SY-4), 37931 is a payload satellite owned by CASC (CN) in SSO that was launched on Sun, 20 Nov 2011 UTC via a CHANG ZHENG 2D launch vehicle from the Jiuquan Satellite Launch Center, China (JSC). 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/37931?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

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https://www.satcat.com/sats-embedded/37931?theme=dark&initialShowStats=false

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Identifier

37931, 2011-068B

Orbit

SSO

Country

CN / PRC

Related business

China Aerospace Science and Technology Corporation (CASC) (CN)

Manufacturer

DFHS/HARB

Mission

Operational Civil Imaging

Bus & Motor

SY, Unknown motor

Mass

~200 kg wet, ~200 kg dry

Launch date (UTC)

2011-11-20 (14 years ago)

Launch vehicle

CHANG ZHENG 2D

Launch site

Jiuquan Satellite Launch Center, China (JSC)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan, 1.5 m

Radar Cross Section

2.045 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 9 hours ago

TLE from 9 hours ago

0 SHIYAN 4 (SY-4)
1 37931U 11068B   26095.30764537  .00000232  00000-0  10492-3 0  9992
2 37931  98.7010 114.2458 0022908   2.7452   8.1983 14.31101438748471

Epoch: 2026-04-05T07:23Z

TLE epoch observation values (Epoch: 2026-04-05T07:23:00.559Z)

Latitude

10.8032°

Longitude

168.21402°

Altitude

773.975 km

Speed

7.476 km/s

True Right ascension

07h 30m 19s

True Declination

10° 44' 25"

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

21:59:48

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

801.605 km

Perigee altitude

768.785 km

Semi-major axis

7,163.332 km

Eccentricity

0.00229

Inclination

98.701°

RAAN

114.2458°

Arg. of periapsis

2.7452°

True anomaly

8.23584°

Mean anomaly

8.1983°

Eccentric anomaly

8.21706°

Mean motion

3.5799 °/min

Orbital period

100.56 mins

BSTAR

0.00010492

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Other satellites on launch #68 in the year 2011 (2011-11-20 UTC)

CZ-2D DEB, 38327

CHUANG XIN 1-03, 37930

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SHIYAN 4 (SY-4) 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.
7 mins	2026-04-06 00:15:24.112Z	118.946° SE	2026-04-06 00:19:24.112Z	57.532° ENE	24.84°	2026-04-06 00:22:24.112Z	15.421° NNE
7 mins	2026-04-06 01:55:24.112Z	211.371° SW	2026-04-06 01:58:24.112Z	266.599° W	28.861°	2026-04-06 02:02:24.112Z	324.551° NNW
8 mins	2026-04-06 14:07:24.112Z	14.488° NNE	2026-04-06 14:11:24.112Z	178.715° S	44.722°	2026-04-06 14:15:24.112Z	193.891° SSW

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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 SHIYAN 4 (SY-4), 37931 on other resources

View SHIYAN 4 (SY-4), 37931 on NASA - NSSDCA Website

View SHIYAN 4 (SY-4), 37931 on Heavens-Above

View SHIYAN 4 (SY-4), 37931 on Keep Track

View SHIYAN 4 (SY-4), 37931 on Celestrak

View SHIYAN 4 (SY-4), 37931 on Gunter's Space Page

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

SHIYAN 4 (SY-4), 37931

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 9 hours ago

TLE from 9 hours ago

TLE epoch observation values (Epoch: 2026-04-05T07:23:00.559Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #68 in the year 2011 (2011-11-20 UTC)

SHIYAN 4 (SY-4) Visibility forecast

Co-orbital & Co-planar RSOs

Check out SHIYAN 4 (SY-4), 37931 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 9 hours ago