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

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Identifier

37931, 2011-068B

Orbit

SSO

Last TLE update

11 hours ago

Origin

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

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

TLE from 11 hours ago

0 SHIYAN 4 (SY-4)
1 37931U 11068B   25197.97731500  .00000108  00000-0  57887-4 0  9993
2 37931  98.7115 211.3954 0023905  51.2835   4.9866 14.30946438710951

Epoch: 2025-07-16T23:27Z

TLE epoch observation values (Epoch: 2025-07-16T23:27:20.015Z)

Latitude

55.41661°

Longitude

-88.25957°

Altitude

780.669 km

Speed

7.478 km/s

True Right ascension

13h 14m 29s

True Declination

55° 15' 22"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-70.56207°

Longitude

-49.43429°

Altitude

823.96 km

Speed

7.435 km/s

Apparent Right ascension

12h 41m 52s

Apparent Declination

-60° 11' 01"

Sunlit

Object is in full shadow

Visualization observer readout

Local Sidereal Time

23:17:47

Azimuth

205.878° SW

Elevation

-65.883°

Doppler factor

Orbital elements

Apogee altitude

802.838 km

Perigee altitude

768.588 km

Semi-major axis

7,163.85 km

Eccentricity

0.00239

Inclination

98.7115°

RAAN

211.3954°

Arg. of periapsis

51.2835°

True anomaly

Unknown

Mean anomaly

4.9866°

Eccentric anomaly

Unknown

Mean motion

3.57951 °/min

Orbital period

100.57 mins

BSTAR

0.000057887

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

CHUANG XIN 1-03, 37930

SHIYAN 4 (SY-4) 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.
9 mins	2025-07-17 13:12:14.429Z	32.785° NE	2025-07-17 13:16:14.429Z	91.748° ESE	31.759°	2025-07-17 13:21:14.429Z	166.38° S
6 mins	2025-07-17 14:53:14.429Z	333.004° NNW	2025-07-17 14:55:14.429Z	302.522° NW	22.911°	2025-07-17 14:59:14.429Z	244.743° WSW
8 mins	2025-07-18 00:30:14.429Z	142.595° SSE	2025-07-18 00:33:14.429Z	89.743° E	38.697°	2025-07-18 00:38:14.429Z	356.665° N
5 mins	2025-07-18 02:11:14.429Z	239.416° WSW	2025-07-18 02:13:14.429Z	265.879° W	15.93°	2025-07-18 02:16:14.429Z	303.913° NW

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 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

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