DECAYED

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SZ-21, 66263 (Decayed)

Orbit data source: Space-Track

SZ-21, 66263 was a payload satellite owned by ZZHGB (CN) in LEO that was launched on Fri, 31 Oct 2025 UTC via a CHANG ZHENG 2F 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/66263?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/66263?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

66263, 2025-246A

Orbit

Decayed

Country

CN / PRC

Related business

China Manned Space Agency (CN)

Manufacturer

CALT

Mission

Decayed Civil Spaceship

Bus & Motor

SHENZHOU, Unknown motor

Mass

~8,100 kg wet, 3,258 kg dry

Launch date (UTC)

2025-10-31 (4 months ago)

Launch vehicle

CHANG ZHENG 2F

Launch site

Jiuquan Satellite Launch Center, China (JSC)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl + 2 Pan, 14.5 m

Radar Cross Section

39.234 m²

Expand to show TLE details & history
Last TLE update: 3 months ago

TLE from 3 months ago

0 SZ-21
1 66263U 25246A   25333.25988665  .00015582  00000-0  20255-3 0  9995
2 66263  41.4663  98.4914 0010669 292.2705  67.7001 15.58389811258132

Epoch: 2025-11-29T06:14Z

TLE epoch observation values (Epoch: 2025-11-29T06:14:14.206Z)

Latitude

-0.00004°

Longitude

-63.45849°

Altitude

389.182 km

Speed

7.68 km/s

True Right ascension

06h 33m 57s

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

06:56:49

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

401.774 km

Perigee altitude

387.322 km

Semi-major axis

6,772.685 km

Eccentricity

0.00107

Inclination

41.4663°

RAAN

98.4914°

Arg. of periapsis

292.2705°

True anomaly

67.81327°

Mean anomaly

67.7001°

Eccentric anomaly

67.75668°

Mean motion

3.89405 °/min

Orbital period

92.45 mins

BSTAR

0.00020255

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Other satellites on launch #246 in the year 2025 (2025-10-31 UTC)

SZ-21 MODULE, 66515

CZ-2F R/B, 66264 (Decayed)

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SZ-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.
4 mins	2026-03-03 16:51:37.847Z	243.818° WSW	2026-03-03 16:53:37.847Z	117.085° SE	42.335°	2026-03-03 16:55:37.847Z	80.365° E
4 mins	2026-03-03 18:28:37.847Z	285.033° WNW	2026-03-03 18:30:37.847Z	42.943° NE	39.58°	2026-03-03 18:32:37.847Z	80.279° E
4 mins	2026-03-03 20:05:37.847Z	275.75° WNW	2026-03-03 20:06:37.847Z	255.812° W	40.134°	2026-03-03 20:09:37.847Z	113.787° 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 SZ-21, 66263 (Decayed) on other resources

View SZ-21, 66263 (Decayed) on Celestrak

View SZ-21, 66263 (Decayed) on Gunter's Space Page

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

SZ-21, 66263 (Decayed)

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 3 months ago

TLE from 3 months ago

TLE epoch observation values (Epoch: 2025-11-29T06:14:14.206Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #246 in the year 2025 (2025-10-31 UTC)

SZ-21 Visibility forecast

Co-orbital & Co-planar RSOs

Check out SZ-21, 66263 (Decayed) on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 3 months ago