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YAOGAN-39 01B, 57728

Orbit data source: Space-Track

YAOGAN-39 01B, 57728 is a payload satellite owned by PLA GAD (CN) in LEO that was launched on Thu, 31 Aug 2023 UTC via a CHANG ZHENG 2D launch vehicle from the Xichang Space Center, China (XSC). 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/57728?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/57728?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

57728, 2023-130B

Orbit

LEO

Country

CN / PRC

Related business

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

Manufacturer

SAST

Mission

Operational Defense Sigint

Bus & Motor

Unknown

Mass

~300 kg wet, ~300 kg dry

Launch date (UTC)

2023-08-31 (3 years ago)

Launch vehicle

CHANG ZHENG 2D

Launch site

Xichang Space Center, China (XSC)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan, 2.5 m

Radar Cross Section

11.063 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 1 day ago

TLE from 1 day ago

0 YAOGAN-39 01B
1 57728U 23130B   26172.33957772  .00003411  00000-0  17371-3 0  9990
2 57728  34.9932 126.2863 0008318 123.7221 236.4285 15.16286924156115

Epoch: 2026-06-21T08:08Z

TLE epoch observation values (Epoch: 2026-06-21T08:08:59.515Z)

Latitude

-0°

Longitude

94.49705°

Altitude

519.158 km

Speed

7.604 km/s

True Right ascension

08h 25m 08s

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

21:34:23

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

526.054 km

Perigee altitude

514.578 km

Semi-major axis

6,898.453 km

Eccentricity

0.00083

Inclination

34.9932°

RAAN

126.2863°

Arg. of periapsis

123.7221°

True anomaly

236.34913°

Mean anomaly

236.4285°

Eccentric anomaly

236.38881°

Mean motion

3.78805 °/min

Orbital period

95.04 mins

BSTAR

0.00017371

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Other satellites on launch #130 in the year 2023 (2023-08-31 UTC)

CZ-2D R/B, 57729 (Decayed)

YAOGAN-39 01A, 57727

YAOGAN-39 01C, 57731

CZ-2D DEB, 57730 (Decayed)

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

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YAOGAN-39 01B 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	2026-06-23 01:32:21.877Z	225.259° WSW	2026-06-23 01:34:21.877Z	180.49° SSW	29.142°	2026-06-23 01:37:21.877Z	111.24° ESE
5 mins	2026-06-23 03:12:21.877Z	242.745° WSW	2026-06-23 03:14:21.877Z	194.669° SSW	31.152°	2026-06-23 03:17:21.877Z	123.516° SE

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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-39 01B, 57728 on other resources

View YAOGAN-39 01B, 57728 on NASA - NSSDCA Website

View YAOGAN-39 01B, 57728 on Heavens-Above

View YAOGAN-39 01B, 57728 on Keep Track

View YAOGAN-39 01B, 57728 on Celestrak

View YAOGAN-39 01B, 57728 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-39 01B, 57728

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-06-21T08:08:59.515Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #130 in the year 2023 (2023-08-31 UTC)

YAOGAN-39 01B Visibility forecast

Co-orbital & Co-planar RSOs

Check out YAOGAN-39 01B, 57728 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago