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TJS-21, 66586

Orbit data source: Space-Track

TJS-21, 66586 is a Chinese payload satellite in HEO that was launched on Fri, 21 Nov 2025 UTC via a CHANG ZHENG 3B 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/66586?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/66586?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

66586, 2025-269A

Orbit

HEO

Country

CN / PRC

Related business

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

Manufacturer

SAST

Mission

Operational Defense Technology

Bus & Motor

TJS11, Unknown motor

Mass

~4,000 kg wet, ~2,500 kg dry

Launch date (UTC)

2025-11-21 (3 months ago)

Launch vehicle

CHANG ZHENG 3B

Launch site

Xichang Space Center, China (XSC)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan + 1 Dish, 14.5 m

Radar Cross Section

63.841 m²

Expand to show TLE details & history
Last TLE update: 4 weeks ago

TLE from 4 weeks ago

0 TJS-21
1 66586U 25269A   26027.58369885  .00001137  00000-0  00000-0 0  9996
2 66586  63.2881 157.5048 6815813 269.5601  18.6566  2.00648686  1353

Epoch: 2026-01-27T14:00Z

TLE epoch observation values (Epoch: 2026-01-27T14:00:31.580Z)

Latitude

0.00004°

Longitude

-179.4954°

Altitude

7,937.111 km

Speed

6.378 km/s

True Right ascension

10h 29m 59s

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

12:04:42

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

38,271.246 km

Perigee altitude

2,076.523 km

Semi-major axis

26,552.022 km

Eccentricity

0.68158

Inclination

63.2881°

RAAN

157.5048°

Arg. of periapsis

269.5601°

True anomaly

90.50672°

Mean anomaly

18.6566°

Eccentric anomaly

47.40458°

Mean motion

0.50165 °/min

Orbital period

717.64 mins

BSTAR

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Other satellites on launch #269 in the year 2025 (2025-11-21 UTC)

CZ-3B R/B, 66587 (Decayed)

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TJS-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.
611 mins	2026-02-22 12:17:03.614Z	270.807° WNW	2026-02-22 19:11:03.614Z	318.698° NNW	33.807°	2026-02-22 22:28:03.614Z	254.478° W
304 mins	2026-02-23 02:30:03.614Z	34.208° NE	2026-02-23 04:52:03.614Z	26.521° NE	16.192°	2026-02-23 07:34:03.614Z	29.221° NE

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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 TJS-21, 66586 on other resources

View TJS-21, 66586 on NASA - NSSDCA Website

View TJS-21, 66586 on Heavens-Above

View TJS-21, 66586 on Keep Track

View TJS-21, 66586 on Celestrak

View TJS-21, 66586 on Gunter's Space Page

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

TJS-21, 66586

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 4 weeks ago

TLE from 4 weeks ago

TLE epoch observation values (Epoch: 2026-01-27T14:00:31.580Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #269 in the year 2025 (2025-11-21 UTC)

TJS-21 Visibility forecast

Co-orbital & Co-planar RSOs

Check out TJS-21, 66586 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 4 weeks ago