DECAYED

OBJECT T, 57021 (Decayed)

Orbit data source: Space-Track

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Recently launched and/or uncataloged satellites may have evolving metadata. Metadata may include but not limited to: Owner, Maufacturer, Bus, Motor, and Mission.

OBJECT T, 57021 was a Chinese satellite in LEO that was launched on Thu, 15 Jun 2023 UTC via a CHANG ZHENG 2D launch vehicle from the Taiyaun Space Center, China (TSC). Unknown objects in Earth's orbit typically refer to objects detected orbiting the Earth but have not yet been identified or cataloged. These objects could be anything from previously untracked satellites, spent rocket stages, debris from satellite collisions, or even natural meteoroids temporarily captured by Earth's gravity. This object's orbit decayed before it could be identified.

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Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/57021?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/57021?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

57021, 2023-085T

Orbit

Decayed

Country

CN / PRC

Related business

None

Manufacturer

Unknown

Mission

Decayed Commercial Imaging

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

2023-06-15 (3 years ago)

Launch vehicle

CHANG ZHENG 2D

Launch site

Taiyaun Space Center, China (TSC)

Object type

Unknown

Shape & HBR

Box, 0.8 m

Radar Cross Section

2.000 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history
Last TLE update: 8 months ago

TLE from 8 months ago

0 OBJECT T
1 57021U 23085T   25303.07126508  .12630116  25644-5  75265-3 0  9999
2 57021  97.4450  65.7657 0009752 278.3298  81.6896 16.41236719132738

Epoch: 2025-10-30T01:42Z

TLE epoch observation values (Epoch: 2025-10-30T01:42:37.302Z)

Latitude

-0.00006°

Longitude

1.47497°

Altitude

164.85 km

Speed

7.808 km/s

True Right ascension

04h 23m 03s

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

21:34:36

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

165.698 km

Perigee altitude

152.947 km

Semi-major axis

6,537.46 km

Eccentricity

0.00098

Inclination

97.445°

RAAN

65.7657°

Arg. of periapsis

278.3298°

True anomaly

81.8002°

Mean anomaly

81.6896°

Eccentric anomaly

81.7449°

Mean motion

4.1061 °/min

Orbital period

87.67 mins

BSTAR

0.00075265

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Other satellites on launch #85 in the year 2023 (2023-06-15 UTC)

OBJECT AD, 57031

OBJECT J, 57012

OBJECT D, 57007 (Decayed)

OBJECT AK, 57037

OBJECT C, 57006 (Decayed)

OBJECT L, 57014

OBJECT N, 57016 (Decayed)

OBJECT B, 57005 (Decayed)

OBJECT F, 57009 (Decayed)

OBJECT K, 57013 (Decayed)

OBJECT E, 57008 (Decayed)

OBJECT AL, 57038

OBJECT Z, 57027 (Decayed)

OBJECT AN, 57040 (Decayed)

OBJECT AB, 57029 (Decayed)

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OBJECT T Visibility

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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.
This satellite is decayed.

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 OBJECT T, 57021 (Decayed) on other resources

View OBJECT T, 57021 (Decayed) on Celestrak

View OBJECT T, 57021 (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.

OBJECT T, 57021 (Decayed)

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 months ago

TLE from 8 months ago

TLE epoch observation values (Epoch: 2025-10-30T01:42:37.302Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #85 in the year 2023 (2023-06-15 UTC)

OBJECT T Visibility

Co-orbital & Co-planar RSOs

Check out OBJECT T, 57021 (Decayed) on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 months ago